--- DOAJ_listed: '1' OA_place: publisher OA_type: gold PlanS_conform: '1' _id: '20974' abstract: - lang: eng text: "Thus far, Lyman-α damping wings towards quasars have been used to probe the global ionization state of the foreground intergalactic medium (IGM). A new parametrization has demonstrated that the damping wing signature also carries local information about the distribution of neutral hydrogen (H I) in front of the quasar before it started shining. Leveraging a recently introduced Bayesian JAX-based Hamiltonian Monte Carlo inference framework, we derive constraints on the Lorentzian-weighted H I column density NDW H I , the quasar’s distance rpatch to the first neutral patch, and its lifetime tQ based on James Webb Space\r\nTelescope (JWST) Near Infrared Spectrograph (NIRSpec) spectra of the two z ∼ 7.5 quasars J1007+2115 and J1342+0928. After folding in model-dependent topology information, we find that J1007+2115 (and J1342+0928) is most likely to reside in a (xH1)= 0.32+0.22 −0.20 (0.58+0.23 −0.23) neutral IGM while shining for a remarkably short lifetime of log10 tQ/yr = 4.14+0.74 −0.18 (an intermediate lifetime of 5.64+0.25 −0.43) along a sightline with log10 NDW\r\nH I /cm−2 = 19.70+0.35 −0.86 (20.24+0.25 −0.22) and rpatch = 28.9+54.0 −14.4 cMpc\r\n(10.9+5.6−5.9 cMpc). In light of the potential presence of local absorbers in the foreground of J1342+0928 as has been recently suggested, we also demonstrate how the Lorentzian-weighted column density NDW H I provides a natural means for quantifying their contribution to the observed damping wing signal." acknowledgement: 'We acknowledge helpful conversations with the ENIGMA group at UC Santa Barbara and Leiden University. This work is based on observations made with the NASA/ESA/CSA JWST. The data were obtained from the Mikulski Archive for Space Telescopes at the Space Telescope Science Institute, which is operated by the Association of Universities for Research in Astronomy, Inc., under NASA contract NAS 5-03127 for JWST. These observations are associated with programmes #1219 and #1764. This work made use of numpy (C. R. Harris et al. 2020), scipy (P. Virtanen et al. 2020), jax (J. Bradbury et al. 2018), numpyro (E. Bingham et al. 2018; D. Phan, N. Pradhan & M. Jankowiak 2019), sklearn (F. Pedregosa et al. 2011), astropy (Astropy Collaboration 2013, 2018, 2022), PypeIt (J. Prochaska et al. 2020), skycalc_ipy (K. Leschinski 2021), h5py (A. Collette 2013), matplotlib (J. D. Hunter 2007), corner.py (D. Foreman-Mackey 2016), and IPython (F. Pérez & B. E. Granger 2007). TK and JFH acknowledge support from the European Research Council (ERC) under the European Union’s Horizon 2020 research and innovation programme (grant agreement no. 885301). JFH acknowledges support from NSF grant no. 2307180. SEIB was supported by the Deutsche Forschungsgemeinschaft (DFG) under Emmy Noether grant number BO 5771/1-1. FW acknowledges support from NSF award AST-2513040.' article_number: staf2219 article_processing_charge: Yes article_type: original arxiv: 1 author: - first_name: Timo full_name: Kist, Timo last_name: Kist - first_name: Joseph F. full_name: Hennawi, Joseph F. last_name: Hennawi - first_name: Frederick B. full_name: Davies, Frederick B. last_name: Davies - first_name: Eduardo full_name: Bañados, Eduardo last_name: Bañados - first_name: Sarah E.I. full_name: Bosman, Sarah E.I. last_name: Bosman - first_name: Zheng full_name: Cai, Zheng last_name: Cai - first_name: Anna Christina full_name: Eilers, Anna Christina last_name: Eilers - first_name: Xiaohui full_name: Fan, Xiaohui last_name: Fan - first_name: Zoltán full_name: Haiman, Zoltán id: 7c006e8c-cc0d-11ee-8322-cb904ef76f36 last_name: Haiman orcid: 0000-0003-3633-5403 - first_name: Hyunsung D. full_name: Jun, Hyunsung D. last_name: Jun - first_name: Yichen full_name: Liu, Yichen last_name: Liu - first_name: Jinyi full_name: Yang, Jinyi last_name: Yang - first_name: Feige full_name: Wang, Feige last_name: Wang citation: ama: Kist T, Hennawi JF, Davies FB, et al. First constraints on the local ionization topology in front of two quasars at z ∼ 7.5. Monthly Notices of the Royal Astronomical Society. 2026;545(3). doi:10.1093/mnras/staf2219 apa: Kist, T., Hennawi, J. F., Davies, F. B., Bañados, E., Bosman, S. E. I., Cai, Z., … Wang, F. (2026). First constraints on the local ionization topology in front of two quasars at z ∼ 7.5. Monthly Notices of the Royal Astronomical Society. Oxford University Press. https://doi.org/10.1093/mnras/staf2219 chicago: Kist, Timo, Joseph F. Hennawi, Frederick B. Davies, Eduardo Bañados, Sarah E.I. Bosman, Zheng Cai, Anna Christina Eilers, et al. “First Constraints on the Local Ionization Topology in Front of Two Quasars at z ∼ 7.5.” Monthly Notices of the Royal Astronomical Society. Oxford University Press, 2026. https://doi.org/10.1093/mnras/staf2219. ieee: T. Kist et al., “First constraints on the local ionization topology in front of two quasars at z ∼ 7.5,” Monthly Notices of the Royal Astronomical Society, vol. 545, no. 3. Oxford University Press, 2026. ista: Kist T, Hennawi JF, Davies FB, Bañados E, Bosman SEI, Cai Z, Eilers AC, Fan X, Haiman Z, Jun HD, Liu Y, Yang J, Wang F. 2026. First constraints on the local ionization topology in front of two quasars at z ∼ 7.5. Monthly Notices of the Royal Astronomical Society. 545(3), staf2219. mla: Kist, Timo, et al. “First Constraints on the Local Ionization Topology in Front of Two Quasars at z ∼ 7.5.” Monthly Notices of the Royal Astronomical Society, vol. 545, no. 3, staf2219, Oxford University Press, 2026, doi:10.1093/mnras/staf2219. short: T. Kist, J.F. Hennawi, F.B. Davies, E. Bañados, S.E.I. Bosman, Z. Cai, A.C. Eilers, X. Fan, Z. Haiman, H.D. Jun, Y. Liu, J. Yang, F. Wang, Monthly Notices of the Royal Astronomical Society 545 (2026). date_created: 2026-01-11T23:01:34Z date_published: 2026-01-01T00:00:00Z date_updated: 2026-01-12T09:45:54Z day: '01' ddc: - '520' department: - _id: ZoHa doi: 10.1093/mnras/staf2219 external_id: arxiv: - '2508.21818' file: - access_level: open_access checksum: 68f04ab0fdcee4f12341d116c5f794cd content_type: application/pdf creator: dernst date_created: 2026-01-12T09:43:07Z date_updated: 2026-01-12T09:43:07Z file_id: '20979' file_name: 2026_MonthNoticesRAS_Kist.pdf file_size: 2174272 relation: main_file success: 1 file_date_updated: 2026-01-12T09:43:07Z fulldoi: https://doi.org/10.1093/mnras/staf2219 has_accepted_license: '1' intvolume: ' 545' issue: '3' language: - iso: eng license: https://creativecommons.org/licenses/by/4.0/ month: '01' oa: 1 oa_version: Published Version publication: Monthly Notices of the Royal Astronomical Society publication_identifier: eissn: - 1365-2966 issn: - 0035-8711 publication_status: published publisher: Oxford University Press quality_controlled: '1' scopus_import: '1' status: public title: First constraints on the local ionization topology in front of two quasars at z ∼ 7.5 tmp: image: /images/cc_by.png legal_code_url: https://creativecommons.org/licenses/by/4.0/legalcode name: Creative Commons Attribution 4.0 International Public License (CC-BY 4.0) short: CC BY (4.0) type: journal_article user_id: 2DF688A6-F248-11E8-B48F-1D18A9856A87 volume: 545 year: '2026' ... --- DOAJ_listed: '1' OA_place: publisher OA_type: gold PlanS_conform: '1' _id: '21038' abstract: - lang: eng text: "Little Red Dots (LRDs) are compact sources at z > 5 discovered through James Webb Space Telescope spectroscopy. Their spectra exhibit broad Balmer emission lines (>~1000 km s^−1), alongside absorption features and a pronounced Balmer break – evidence for a dense, neutral hydrogen medium, in which the n = 2 state is significantly populated. When interpreted as arising\r\nfrom active galactic nucleus broad-line regions, inferred black hole masses from local scaling relations exceed expectations given their stellar masses, challenging models of early black hole–galaxy co-evolution. However, radiative transfer effects in dense media may also impact the formation of hydrogen emission lines. We model three scattering processes shaping hydrogen\r\nline profiles: resonance scattering by hydrogen in the n = 2 state, Raman scattering of ultraviolet (UV) radiation by ground-state hydrogen, and Thomson scattering by free electrons. Using 3D Monte Carlo radiative transfer simulations, we examine their imprint on line shapes and ratios. Resonance scattering produces strong deviations from Case B flux ratios, clear differences\r\nbetween Hα and Hβ, and encodes gas kinematics in line profiles but cannot broaden Hβ due to conversion to Paα. While Raman scattering can yield broad wings, scattering of the UV continuum is disfavoured given the absence of strong full width at half-maximum variations across transitions. Raman scattering of higher Lyman-series emission can produce Hα/Hβ wing\r\nwidth ratios of >~1.28, agreeing with observations. Thomson scattering can reproduce the observed >~ 1000 km s^−1 wings under plausible conditions – e.g. Te ∼ 10^4 K and Ne ∼ 10^24 cm^−2 – and lead to black hole mass overestimates by factors 10. Our results provide a framework for interpreting hydrogen lines in LRDs and similar systems." acknowledgement: "The authorsthank the anonymousreferee for constructive comments, which improved the clarity of this paper. SJC acknowledges support from the ERC synergy grant 101166930 – RECAP. MG thanks the Max Planck Society for support through the Max Planck Research Group, and the European Union forsupport through ERC-2024-STG 101165038 (ReMMU). JM acknowledges funding by the European Union (ERC, AGENTS, 101076224). CAM acknowledges support\r\nby the European Union ERC grant RISES (101163035), Carlsberg Foundation (CF22-1322), and VILLUM FONDEN (37459). Computations were performed on HPC systems Freya and Orion at the Max Planck Computing and Data Facility." article_number: staf2131 article_processing_charge: Yes article_type: original arxiv: 1 author: - first_name: Seok Jun full_name: Chang, Seok Jun last_name: Chang - first_name: Max full_name: Gronke, Max last_name: Gronke - first_name: Jorryt J full_name: Matthee, Jorryt J id: 7439a258-f3c0-11ec-9501-9df22fe06720 last_name: Matthee orcid: 0000-0003-2871-127X - first_name: Charlotte full_name: Mason, Charlotte last_name: Mason citation: ama: Chang SJ, Gronke M, Matthee JJ, Mason C. Impact of resonance, Raman, and Thomson scattering on hydrogen line formation in Little Red Dots. Monthly Notices of the Royal Astronomical Society. 2026;545(4). doi:10.1093/mnras/staf2131 apa: Chang, S. J., Gronke, M., Matthee, J. J., & Mason, C. (2026). Impact of resonance, Raman, and Thomson scattering on hydrogen line formation in Little Red Dots. Monthly Notices of the Royal Astronomical Society. Oxford University Press. https://doi.org/10.1093/mnras/staf2131 chicago: Chang, Seok Jun, Max Gronke, Jorryt J Matthee, and Charlotte Mason. “Impact of Resonance, Raman, and Thomson Scattering on Hydrogen Line Formation in Little Red Dots.” Monthly Notices of the Royal Astronomical Society. Oxford University Press, 2026. https://doi.org/10.1093/mnras/staf2131. ieee: S. J. Chang, M. Gronke, J. J. Matthee, and C. Mason, “Impact of resonance, Raman, and Thomson scattering on hydrogen line formation in Little Red Dots,” Monthly Notices of the Royal Astronomical Society, vol. 545, no. 4. Oxford University Press, 2026. ista: Chang SJ, Gronke M, Matthee JJ, Mason C. 2026. Impact of resonance, Raman, and Thomson scattering on hydrogen line formation in Little Red Dots. Monthly Notices of the Royal Astronomical Society. 545(4), staf2131. mla: Chang, Seok Jun, et al. “Impact of Resonance, Raman, and Thomson Scattering on Hydrogen Line Formation in Little Red Dots.” Monthly Notices of the Royal Astronomical Society, vol. 545, no. 4, staf2131, Oxford University Press, 2026, doi:10.1093/mnras/staf2131. short: S.J. Chang, M. Gronke, J.J. Matthee, C. Mason, Monthly Notices of the Royal Astronomical Society 545 (2026). date_created: 2026-01-25T23:01:39Z date_published: 2026-02-01T00:00:00Z date_updated: 2026-02-12T12:56:33Z day: '01' ddc: - '520' department: - _id: JoMa doi: 10.1093/mnras/staf2131 external_id: arxiv: - '2508.08768' file: - access_level: open_access checksum: 52ba7d7b5b80af0c50f57e4c2acc3930 content_type: application/pdf creator: dernst date_created: 2026-02-12T12:44:33Z date_updated: 2026-02-12T12:44:33Z file_id: '21220' file_name: 2026_MonthNoticesRAS_Chang.pdf file_size: 5600366 relation: main_file success: 1 file_date_updated: 2026-02-12T12:44:33Z fulldoi: https://doi.org/10.1093/mnras/staf2131 has_accepted_license: '1' intvolume: ' 545' issue: '4' language: - iso: eng month: '02' oa: 1 oa_version: Published Version project: - _id: bd9b2118-d553-11ed-ba76-db24564edfea grant_number: '101076224' name: Young galaxies as tracers and agents of cosmic reionization publication: Monthly Notices of the Royal Astronomical Society publication_identifier: eissn: - 1365-2966 issn: - 0035-8711 publication_status: published publisher: Oxford University Press quality_controlled: '1' scopus_import: '1' status: public title: Impact of resonance, Raman, and Thomson scattering on hydrogen line formation in Little Red Dots tmp: image: /images/cc_by.png legal_code_url: https://creativecommons.org/licenses/by/4.0/legalcode name: Creative Commons Attribution 4.0 International Public License (CC-BY 4.0) short: CC BY (4.0) type: journal_article user_id: 2DF688A6-F248-11E8-B48F-1D18A9856A87 volume: 545 year: '2026' ... --- DOAJ_listed: '1' OA_place: publisher OA_type: gold _id: '21745' abstract: - lang: eng text: 'The small DAHe and DAe spectral classes comprise isolated, hydrogen-dominated atmosphere white dwarfs that exhibit variable photometric flux and Balmer line emission. These mysterious systems offer unique insight into the complex interplay between magnetic fields, stellar rotation and atmospheric activity in single white dwarfs. DAHe stars have detectable magnetic fields through Zeeman-split spectral lines, whereas DAe stars lack such splitting. We report the first discovery and characterization of magnetism in the DAe white dwarf WD J165335.21−100116.33 with new time-resolved spectropolarimetry from FORS2. We detect a weak but variable longitudinal magnetic field with values Bz > −9.2 ± 2.4 kG and Bz < −2.2 ± 1.0 kG. Independent ZTF and ATLAS photometry reveal a consistent period of P = 80.3070 ± 0.0007 h. Time-resolved optical spectroscopy obtained with six ground-based instruments demonstrates strong modulation in the strength of the Hα and Hβ Balmer line emission with P = 80.2922 ± 0.0108 h. The photometric flux and Balmer emission strength vary in antiphase, with the strongest magnetic detections coinciding with phases of low photometric flux and strong line emission. These characteristicssupport the theory that a magnetically active, temperature-inverted spot/region is producing an optically thin chromospheric emission region. Comparison with other DAe and DAHe white dwarfsreveals all systems have a strikingly similar antiphase phenomenology, reinforcing the theory that they are subject to a unified physical mechanism. With the detection of a weak magnetic field, we reclassify WD J165335.21−100116.33 as a low-field DAHe white dwarf. ' acknowledgement: "This project has received funding from the European Research Council under the European Union’s Horizon 2020 research and innovation programme (Grant agreement numbers 101002408). The observationsfrom the FOcal Reducer/low dispersion Spectrograph 2 (FORS2) instrument were collected at the European Southern Observatory (ESO) under ESO programme(s) 113.26ES.001. This work has made use of data from the European Space\r\nAgency (ESA) mission Gaia (https://www.cosmos.esa.int/gaia), processed by the Gaia Data Processing and Analysis Consortium (DPAC, https://www.cosmos.esa.int/web/gaia/dpac/conso\r\nrtium). Funding for the DPAC has been provided by national institutions, in particular the institutions participating in the Gaia Multilateral Agreement. Based on observations obtained with the Samuel Oschin Telescope 48-inch and the 60-inch Telescope at the Palomar Observatory as part of the Zwicky Transient Facility project. ZTF is supported by the National Science Foundation under Grants No. AST-1440341 and AST-2034437 and a collaboration including current partners Caltech, IPAC, the Weizmann Institute for Science, the Oskar Klein Center at Stockholm University, the University of Maryland, Deutsches Elektronen-Synchrotron and\r\nHumboldt University, the TANGO Consortium of Taiwan, the University of Wisconsin at Milwaukee, Trinity College Dublin, Lawrence Livermore National Laboratories, IN2P3, University\r\nof Warwick, Ruhr University Bochum, Northwestern University and former partners the University of Washington, Los Alamos National Laboratories, and Lawrence Berkeley National Laboratories. Operations are conducted by COO, IPAC, and UW. This work has made use of data from the Asteroid Terrestrialimpact Last Alert System (ATLAS) project. The Asteroid Terrestrial-impact Last Alert System (ATLAS) project is primarily funded to search for near earth asteroids through NASA grants NN12AR55G, 80NSSC18K0284, and 80NSSC18K1575; byproducts of the NEO search include images and catalogs from the survey area. This work was partially funded by Kepler/K2 grant J1944/80NSSC19K0112 and HST GO-15889, and STFC grants ST/T000198/1 and ST/S006109/1. The ATLAS science products have been made possible through the contributions of the University of Hawaii Institute for Astronomy, the Queen’s University Belfast, the Space Telescope Science Institute, the South African\r\nAstronomical Observatory, and The Millennium Institute of Astrophysics (MAS), Chile.\r\nThis work makes use of observations from the Las Cumbres Observatory global telescope network. Research at Lick Observatory is partially supported by a generous gift from Google. A major upgrade of the Kast spectrograph on the Shane 3 m telescope at Lick Observatory was made possible through generous gifts from William and Marina Kast as well as the Heising–Simons Foundation. The Isaac Newton Telescope is operated on the island of La Palma by the Isaac Newton Group of Telescopes in the Spanish Observatorio del Roque de los Muchachos of the Instituto de Astrofísica de Canarias.This paper includes data gathered with the 6.5 meter Magellan Telescopes located at Las Campanas Observatory, Chile. Observations reported here were obtained at the Multiple Mirror Telescope (MMT) Observatory, a joint facility of the Smithsonian Institution and the University of Arizona. Based on observations collected at Centro Astronómico Hispano en Andalucía (CAHA) at Calar Alto, operated jointly by Junta de Andalucía and Consejo Superior de Investigaciones Científicas (IAA-CSIC)." article_number: stag505 article_processing_charge: Yes article_type: original arxiv: 1 author: - first_name: Abbigail K. full_name: Elms, Abbigail K. last_name: Elms - first_name: Stefano full_name: Bagnulo, Stefano last_name: Bagnulo - first_name: Pier Emmanuel full_name: Tremblay, Pier Emmanuel last_name: Tremblay - first_name: Tim full_name: Cunningham, Tim last_name: Cunningham - first_name: James full_name: Munday, James last_name: Munday - first_name: John full_name: Landstreet, John last_name: Landstreet - first_name: Kareem full_name: El-Badry, Kareem last_name: El-Badry - first_name: Ilaria full_name: Caiazzo, Ilaria id: 8ae5b6e7-2a03-11ee-914d-b58ed7a3b47d last_name: Caiazzo orcid: 0000-0002-4770-5388 - first_name: Carl full_name: Melis, Carl last_name: Melis - first_name: Viktoria full_name: Pinter, Viktoria last_name: Pinter - first_name: Alycia full_name: Weinberger, Alycia last_name: Weinberger citation: ama: Elms AK, Bagnulo S, Tremblay PE, et al. Detection of a weak magnetic field in the Balmer emission line white dwarf WDJ1653−1001. Monthly Notices of the Royal Astronomical Society. 2026;548(1). doi:10.1093/mnras/stag505 apa: Elms, A. K., Bagnulo, S., Tremblay, P. E., Cunningham, T., Munday, J., Landstreet, J., … Weinberger, A. (2026). Detection of a weak magnetic field in the Balmer emission line white dwarf WDJ1653−1001. Monthly Notices of the Royal Astronomical Society. Oxford University Press. https://doi.org/10.1093/mnras/stag505 chicago: Elms, Abbigail K., Stefano Bagnulo, Pier Emmanuel Tremblay, Tim Cunningham, James Munday, John Landstreet, Kareem El-Badry, et al. “Detection of a Weak Magnetic Field in the Balmer Emission Line White Dwarf WDJ1653−1001.” Monthly Notices of the Royal Astronomical Society. Oxford University Press, 2026. https://doi.org/10.1093/mnras/stag505. ieee: A. K. Elms et al., “Detection of a weak magnetic field in the Balmer emission line white dwarf WDJ1653−1001,” Monthly Notices of the Royal Astronomical Society, vol. 548, no. 1. Oxford University Press, 2026. ista: Elms AK, Bagnulo S, Tremblay PE, Cunningham T, Munday J, Landstreet J, El-Badry K, Caiazzo I, Melis C, Pinter V, Weinberger A. 2026. Detection of a weak magnetic field in the Balmer emission line white dwarf WDJ1653−1001. Monthly Notices of the Royal Astronomical Society. 548(1), stag505. mla: Elms, Abbigail K., et al. “Detection of a Weak Magnetic Field in the Balmer Emission Line White Dwarf WDJ1653−1001.” Monthly Notices of the Royal Astronomical Society, vol. 548, no. 1, stag505, Oxford University Press, 2026, doi:10.1093/mnras/stag505. short: A.K. Elms, S. Bagnulo, P.E. Tremblay, T. Cunningham, J. Munday, J. Landstreet, K. El-Badry, I. Caiazzo, C. Melis, V. Pinter, A. Weinberger, Monthly Notices of the Royal Astronomical Society 548 (2026). date_created: 2026-04-19T22:07:42Z date_published: 2026-05-01T00:00:00Z date_updated: 2026-05-04T12:11:53Z day: '01' ddc: - '520' department: - _id: IlCa doi: 10.1093/mnras/stag505 external_id: arxiv: - '2603.12048' file: - access_level: open_access checksum: 75c48d70d10a9a48875f577e04da80bc content_type: application/pdf creator: dernst date_created: 2026-05-04T12:10:40Z date_updated: 2026-05-04T12:10:40Z file_id: '21794' file_name: 2026_MNRAS_Elms.pdf file_size: 4991495 relation: main_file success: 1 file_date_updated: 2026-05-04T12:10:40Z fulldoi: https://doi.org/10.1093/mnras/stag505 has_accepted_license: '1' intvolume: ' 548' issue: '1' language: - iso: eng month: '05' oa: 1 oa_version: Published Version publication: Monthly Notices of the Royal Astronomical Society publication_identifier: eissn: - 1365-2966 issn: - 0035-8711 publication_status: published publisher: Oxford University Press quality_controlled: '1' scopus_import: '1' status: public title: Detection of a weak magnetic field in the Balmer emission line white dwarf WDJ1653−1001 tmp: image: /images/cc_by.png legal_code_url: https://creativecommons.org/licenses/by/4.0/legalcode name: Creative Commons Attribution 4.0 International Public License (CC-BY 4.0) short: CC BY (4.0) type: journal_article user_id: 2DF688A6-F248-11E8-B48F-1D18A9856A87 volume: 548 year: '2026' ... --- DOAJ_listed: '1' OA_place: publisher OA_type: gold _id: '21780' abstract: - lang: eng text: It is predicted that half or more of all cataclysmic variables (CVs) should have evolved past the period minimum and now exist as so-called period bouncers where a white dwarf should be accreting from a Roche lobe filling substellar companion. However, this prediction stands in stark contrast to observations, where only a few per cent of CVs are found in this evolutionary phase. A potential solution to this discrepancy is that a magnetic field emerges from within the white dwarf after the system has reached the period minimum. The transfer of angular momentum from the spin of the white dwarf into the orbit then pushes the two stars apart, detaching them for potentially billions of years. Here we present the discovery of ZTF J021804.16+071152.93, a detached 0.69 +- 0.01 M⁠, 19 MG magnetic white dwarf plus 37 +- 5MJup brown dwarf binary with an orbital period of 1.7 h. The kinematics of the system indicate that it is a high probability member of the Galactic thick disc. However, this strongly disagrees with the much younger age of the system obtained from the white dwarf parameters, implying that the system may have been accreting in the past. This system is therefore consistent with having detached as a result of the emergence of the magnetic field of the white dwarf when the system was still mass transferring, and may represent the ultimate fate for many (perhaps even most) CVs. acknowledgement: "The results presented in this paper are based on observations collected at the European Southern Observatory under programme IDs 113.D-0277 and 114.D-0066 and on observations made with the Gran Telescopio Canarias (programme ID GTC119-23B), installed in the Spanish Observatorio del Roque de los Muchachos of the Instituto de Astrofísica de Canarias, on the island of La Palma.\r\n\r\nSGP acknowledges support by the Science and Technology Facilities Council (grant ST/B001174/1). ARM acknowledges support from MINECO under the PID2023-148661NB-I00 grant and by the AGAUR/Generalitat de Catalunya grant SGR-386/2021. RMO was funded by INTA through grant PRE-OBSERVATORIO and acknowledges support from project PID2023-146210NB-I00 funded by MICIU/AEI/10.13039/501100011033 and by ERDF/EU. MZ acknowledges support from FONDECYT (grants 1250525 and 1221059). VSD and HiPERCAM were funded by the Science and Technology Facilities Council (grant ST/Z000033/1). MRS thanks for support from FONDECYT (grant No. 1221059). This project received funding from the European Research Council under the European Union’s Horizon 2020 research and innovation programme (Grant agreement numbers 101002408-MOS100PC)." article_number: stag521 article_processing_charge: Yes article_type: original arxiv: 1 author: - first_name: S. G. full_name: Parsons, S. G. last_name: Parsons - first_name: A. J. full_name: Brown, A. J. last_name: Brown - first_name: S. L. full_name: Casewell, S. L. last_name: Casewell - first_name: S. P. full_name: Littlefair, S. P. last_name: Littlefair - first_name: Joannes C full_name: van Roestel, Joannes C id: 4d122fc8-6083-11f0-87a5-97d68b860333 last_name: van Roestel - first_name: A. full_name: Rebassa-Mansergas, A. last_name: Rebassa-Mansergas - first_name: R. full_name: Murillo-Ojeda, R. last_name: Murillo-Ojeda - first_name: M. full_name: Zorotovic, M. last_name: Zorotovic - first_name: M. R. full_name: Schreiber, M. R. last_name: Schreiber - first_name: S. full_name: Bagnulo, S. last_name: Bagnulo - first_name: M. A. full_name: Stroet, M. A. last_name: Stroet - first_name: N. full_name: Castro Segura, N. last_name: Castro Segura - first_name: V. S. full_name: Dhillon, V. S. last_name: Dhillon - first_name: M. J. full_name: Dyer, M. J. last_name: Dyer - first_name: J. A. full_name: Garbutt, J. A. last_name: Garbutt - first_name: M. J. full_name: Green, M. J. last_name: Green - first_name: D. full_name: Jarvis, D. last_name: Jarvis - first_name: M. R. full_name: Kennedy, M. R. last_name: Kennedy - first_name: P. full_name: Kerry, P. last_name: Kerry - first_name: J. full_name: Mccormac, J. last_name: Mccormac - first_name: J. full_name: Munday, J. last_name: Munday - first_name: I. full_name: Pelisoli, I. last_name: Pelisoli - first_name: E. full_name: Pike, E. last_name: Pike - first_name: D. I. full_name: Sahman, D. I. last_name: Sahman - first_name: A. full_name: Yates, A. last_name: Yates citation: ama: 'Parsons SG, Brown AJ, Casewell SL, et al. ZTF J021804.16+071152.93: A dead cataclysmic variable and potential solution to the missing period bouncer cataclysmic variables. Monthly Notices of the Royal Astronomical Society. 2026;547(4). doi:10.1093/mnras/stag521' apa: 'Parsons, S. G., Brown, A. J., Casewell, S. L., Littlefair, S. P., van Roestel, J. C., Rebassa-Mansergas, A., … Yates, A. (2026). ZTF J021804.16+071152.93: A dead cataclysmic variable and potential solution to the missing period bouncer cataclysmic variables. Monthly Notices of the Royal Astronomical Society. Oxford University Press. https://doi.org/10.1093/mnras/stag521' chicago: 'Parsons, S. G., A. J. Brown, S. L. Casewell, S. P. Littlefair, Joannes C van Roestel, A. Rebassa-Mansergas, R. Murillo-Ojeda, et al. “ZTF J021804.16+071152.93: A Dead Cataclysmic Variable and Potential Solution to the Missing Period Bouncer Cataclysmic Variables.” Monthly Notices of the Royal Astronomical Society. Oxford University Press, 2026. https://doi.org/10.1093/mnras/stag521.' ieee: 'S. G. Parsons et al., “ZTF J021804.16+071152.93: A dead cataclysmic variable and potential solution to the missing period bouncer cataclysmic variables,” Monthly Notices of the Royal Astronomical Society, vol. 547, no. 4. Oxford University Press, 2026.' ista: 'Parsons SG, Brown AJ, Casewell SL, Littlefair SP, van Roestel JC, Rebassa-Mansergas A, Murillo-Ojeda R, Zorotovic M, Schreiber MR, Bagnulo S, Stroet MA, Castro Segura N, Dhillon VS, Dyer MJ, Garbutt JA, Green MJ, Jarvis D, Kennedy MR, Kerry P, Mccormac J, Munday J, Pelisoli I, Pike E, Sahman DI, Yates A. 2026. ZTF J021804.16+071152.93: A dead cataclysmic variable and potential solution to the missing period bouncer cataclysmic variables. Monthly Notices of the Royal Astronomical Society. 547(4), stag521.' mla: 'Parsons, S. G., et al. “ZTF J021804.16+071152.93: A Dead Cataclysmic Variable and Potential Solution to the Missing Period Bouncer Cataclysmic Variables.” Monthly Notices of the Royal Astronomical Society, vol. 547, no. 4, stag521, Oxford University Press, 2026, doi:10.1093/mnras/stag521.' short: S.G. Parsons, A.J. Brown, S.L. Casewell, S.P. Littlefair, J.C. van Roestel, A. Rebassa-Mansergas, R. Murillo-Ojeda, M. Zorotovic, M.R. Schreiber, S. Bagnulo, M.A. Stroet, N. Castro Segura, V.S. Dhillon, M.J. Dyer, J.A. Garbutt, M.J. Green, D. Jarvis, M.R. Kennedy, P. Kerry, J. Mccormac, J. Munday, I. Pelisoli, E. Pike, D.I. Sahman, A. Yates, Monthly Notices of the Royal Astronomical Society 547 (2026). date_created: 2026-05-03T22:01:37Z date_published: 2026-04-01T00:00:00Z date_updated: 2026-05-07T07:51:58Z day: '01' ddc: - '520' department: - _id: IlCa doi: 10.1093/mnras/stag521 external_id: arxiv: - '2603.12888' file: - access_level: open_access checksum: a64094199db4dedb12fc121b7c65fe97 content_type: application/pdf creator: dernst date_created: 2026-05-07T07:51:06Z date_updated: 2026-05-07T07:51:06Z file_id: '21834' file_name: 2026_MNRAS_Parsons.pdf file_size: 5955512 relation: main_file success: 1 file_date_updated: 2026-05-07T07:51:06Z fulldoi: https://doi.org/10.1093/mnras/stag521 has_accepted_license: '1' intvolume: ' 547' issue: '4' language: - iso: eng month: '04' oa: 1 oa_version: Published Version publication: Monthly Notices of the Royal Astronomical Society publication_identifier: eissn: - 1365-2966 issn: - 0035-8711 publication_status: published publisher: Oxford University Press quality_controlled: '1' scopus_import: '1' status: public title: 'ZTF J021804.16+071152.93: A dead cataclysmic variable and potential solution to the missing period bouncer cataclysmic variables' tmp: image: /images/cc_by.png legal_code_url: https://creativecommons.org/licenses/by/4.0/legalcode name: Creative Commons Attribution 4.0 International Public License (CC-BY 4.0) short: CC BY (4.0) type: journal_article user_id: 2DF688A6-F248-11E8-B48F-1D18A9856A87 volume: 547 year: '2026' ... --- DOAJ_listed: '1' OA_place: publisher OA_type: gold PlanS_conform: '1' _id: '21897' abstract: - lang: eng text: Ultracompact binary systems, consisting of two compact objects in an orbit $\lesssim 0.5 {\rm R}_\odot$, should exhibit measurable rates of orbital period change ($\dot{P} \ne 0$) due to the emission of gravitational waves (GWs). Measurements of $\dot{P}$ have so far been limited to the shortest-period ultracompact binaries ($\lesssim 20$  min). Among the AM CVn-type subclass, several works have proposed the presence of extra angular momentum loss beyond GW emission, with magnetic braking being a widely discussed mechanism. If present, this magnetic braking would dominate the angular momentum loss of AM CVn-type binaries with orbital periods $\gtrsim 30$ min. In this work, we present a long-term eclipse timing study of two AM CVn-type binaries, YZ LMi and Gaia14aae, with respective orbital periods of 28.3 min and 49.7 min and continuous observations since 2006 and 2015. Both systems show $\dot{P}$ consistent with zero within $2\sigma$. Their $3\sigma$ upper limits are $1.1 \times 10^{-13}\, {\rm s \, s}^{-1}$ and $9.7 \times 10^{-14}\, {\rm s \, s}^{-1}$, respectively. These non-detections are most simply explained by a scenario in which secular angular momentum loss is not substantially stronger than GW emission at all orbital periods, but is combined with deviations from the secular $\dot{P}$ whose time-scales span decades but whose amplitude is $\lesssim 10^{-13}\, {\rm s \, s}^{-1}$. Our non-detections of $\dot{P}$ represent a limit on the strength of any enhanced angular momentum loss beyond pure GW emission. acknowledgement: "We are grateful to the anonymousreferee fortheirinsightful comments. MJG thanks Mitch Begelman and the JILA department at the University of Colorado, Boulder, for providing office space at which much of this paper was written. This work is supported in part by the United States National Aeronautics and Space Administration (NASA) under grants\r\n80NSSC24K0436, 80NSSC22K0479, and 80NSSC24K0380, and the United States National Science Foundation (NSF) under grant AST-2508429. VSD and HiPERCAM are funded by the Science and Technology Facilities Council (grant ST/Z000033/1). IP acknowledges support from the Royal Society through a University Research Fellowship (URF\\R1\\231496). This project has received funding from the European Research Council under the European Union’s Horizon 2020 research and innovation programme (grant agreement numbers 101002408 – MOS100PC). CMC receives funding from United Kingdom Research and Innovation grant numbers ST/X005933/1 and ST/W001934/1. This article is based in part on observations made in the Observatorios de Canarias del Instituto de Astrofísica de Canarias (IAC) with the the William Herschel Telescope (WHT) operated on the island of La Palma by the Isaac Newton Group (ING) in the Observatorio del Roque de los Muchachos. It is also based in part on observations made with the Gran Telescopio Canarias (GTC) under proposal ID GTC18-24A, installed at the Spanish Observatorio del Roque de los Muchachos of the Instituto de Astrofísica de Canarias, in the island of La Palma. Further data were obtained using the 2.4 m Thai National Telescope (TNT) operated by the National Astronomy Research Institute of Thailand\r\n(NARIT), and the 200-inch Hale Telescope at Palomar Observatory operated by the California Institute of Technology. Software packages used in this work include the ultracam and hipercam reduction pipelines, lcurve (C. M. Copperwheat et al. 2010), numpy, astropy, matplotlib, and emcee (D. Foreman-Mackey et al. 2013)." article_number: stag673 article_processing_charge: Yes article_type: original arxiv: 1 author: - first_name: Matthew J full_name: Green, Matthew J last_name: Green - first_name: Thomas R full_name: Marsh, Thomas R last_name: Marsh - first_name: Joannes C full_name: van Roestel, Joannes C id: 4d122fc8-6083-11f0-87a5-97d68b860333 last_name: van Roestel - first_name: Tin Long Sunny full_name: Wong, Tin Long Sunny last_name: Wong - first_name: Diogo full_name: Belloni, Diogo last_name: Belloni - first_name: Mukremin full_name: Kilic, Mukremin last_name: Kilic - first_name: Elmé full_name: Breedt, Elmé last_name: Breedt - first_name: Alex full_name: Brown, Alex last_name: Brown - first_name: Chris M full_name: Copperwheat, Chris M last_name: Copperwheat - first_name: Anurak full_name: Chakpor, Anurak last_name: Chakpor - first_name: V S full_name: Dhillon, V S last_name: Dhillon - first_name: Noel Castro full_name: Segura, Noel Castro last_name: Segura - first_name: Martin J full_name: Dyer, Martin J last_name: Dyer - first_name: James full_name: Garbutt, James last_name: Garbutt - first_name: Dan full_name: Jarvis, Dan last_name: Jarvis - first_name: Vasu full_name: Kengkriangkrai, Vasu last_name: Kengkriangkrai - first_name: Mark R full_name: Kennedy, Mark R last_name: Kennedy - first_name: Paul full_name: Kerry, Paul last_name: Kerry - first_name: Thomas full_name: Kupfer, Thomas last_name: Kupfer - first_name: S P full_name: Littlefair, S P last_name: Littlefair - first_name: James full_name: McCormac, James last_name: McCormac - first_name: James full_name: Munday, James last_name: Munday - first_name: Steven G full_name: Parsons, Steven G last_name: Parsons - first_name: Eleanor full_name: Pike, Eleanor last_name: Pike - first_name: Ingrid full_name: Pelisoli, Ingrid last_name: Pelisoli - first_name: Pablo full_name: Rodríguez-Gil, Pablo last_name: Rodríguez-Gil - first_name: David I full_name: Sahman, David I last_name: Sahman - first_name: Amalie full_name: Yates, Amalie last_name: Yates citation: ama: Green MJ, Marsh TR, van Roestel JC, et al. No period change in two long-period AM CVn binaries. Monthly Notices of the Royal Astronomical Society. 2026;548(3). doi:10.1093/mnras/stag673 apa: Green, M. J., Marsh, T. R., van Roestel, J. C., Wong, T. L. S., Belloni, D., Kilic, M., … Yates, A. (2026). No period change in two long-period AM CVn binaries. Monthly Notices of the Royal Astronomical Society. Oxford University Press. https://doi.org/10.1093/mnras/stag673 chicago: Green, Matthew J, Thomas R Marsh, Joannes C van Roestel, Tin Long Sunny Wong, Diogo Belloni, Mukremin Kilic, Elmé Breedt, et al. “No Period Change in Two Long-Period AM CVn Binaries.” Monthly Notices of the Royal Astronomical Society. Oxford University Press, 2026. https://doi.org/10.1093/mnras/stag673. ieee: M. J. Green et al., “No period change in two long-period AM CVn binaries,” Monthly Notices of the Royal Astronomical Society, vol. 548, no. 3. Oxford University Press, 2026. ista: Green MJ, Marsh TR, van Roestel JC, Wong TLS, Belloni D, Kilic M, Breedt E, Brown A, Copperwheat CM, Chakpor A, Dhillon VS, Segura NC, Dyer MJ, Garbutt J, Jarvis D, Kengkriangkrai V, Kennedy MR, Kerry P, Kupfer T, Littlefair SP, McCormac J, Munday J, Parsons SG, Pike E, Pelisoli I, Rodríguez-Gil P, Sahman DI, Yates A. 2026. No period change in two long-period AM CVn binaries. Monthly Notices of the Royal Astronomical Society. 548(3), stag673. mla: Green, Matthew J., et al. “No Period Change in Two Long-Period AM CVn Binaries.” Monthly Notices of the Royal Astronomical Society, vol. 548, no. 3, stag673, Oxford University Press, 2026, doi:10.1093/mnras/stag673. short: M.J. Green, T.R. Marsh, J.C. van Roestel, T.L.S. Wong, D. Belloni, M. Kilic, E. Breedt, A. Brown, C.M. Copperwheat, A. Chakpor, V.S. Dhillon, N.C. Segura, M.J. Dyer, J. Garbutt, D. Jarvis, V. Kengkriangkrai, M.R. Kennedy, P. Kerry, T. Kupfer, S.P. Littlefair, J. McCormac, J. Munday, S.G. Parsons, E. Pike, I. Pelisoli, P. Rodríguez-Gil, D.I. Sahman, A. Yates, Monthly Notices of the Royal Astronomical Society 548 (2026). date_created: 2026-05-20T14:34:03Z date_published: 2026-04-09T00:00:00Z date_updated: 2026-05-21T06:41:41Z day: '09' ddc: - '520' department: - _id: IlCa doi: 10.1093/mnras/stag673 external_id: arxiv: - '2604.06460' file: - access_level: open_access checksum: 2c4463926c5cb84ce555ef2005b52ddd content_type: application/pdf creator: dernst date_created: 2026-05-21T06:37:42Z date_updated: 2026-05-21T06:37:42Z file_id: '21903' file_name: 2026_MNRAS_Green.pdf file_size: 3960296 relation: main_file success: 1 file_date_updated: 2026-05-21T06:37:42Z fulldoi: https://doi.org/10.1093/mnras/stag673 has_accepted_license: '1' intvolume: ' 548' issue: '3' keyword: - 'binaries: close – stars' - dwarf novae – novae - cataclysmic variables – white dwarfs language: - iso: eng month: '04' oa: 1 oa_version: Published Version publication: Monthly Notices of the Royal Astronomical Society publication_identifier: eissn: - 1365-2966 issn: - 0035-8711 publication_status: published publisher: Oxford University Press quality_controlled: '1' scopus_import: '1' status: public title: No period change in two long-period AM CVn binaries tmp: image: /images/cc_by.png legal_code_url: https://creativecommons.org/licenses/by/4.0/legalcode name: Creative Commons Attribution 4.0 International Public License (CC-BY 4.0) short: CC BY (4.0) type: journal_article user_id: 2DF688A6-F248-11E8-B48F-1D18A9856A87 volume: 548 year: '2026' ... --- DOAJ_listed: '1' OA_place: publisher OA_type: gold PlanS_conform: '1' _id: '21898' abstract: - lang: eng text: We investigate the nature and spectroscopic diversity of early galaxies from a sample of 41 sources at $z\geqslant 10$ with James Webb Space Telescope (JWST)/NIRSpec prism observations. We compare the properties of strong ultraviolet (UV) line emitters, traced by intense C iv emission, with those of more ‘typical’ sources with weak or undetected C iv. The more typical (or ‘C iv-weak’) sources reveal significant scatter in their C iii] line strengths, UV continuum slopes, and physical sizes, spanning C iii] equivalent widths (EWs) of $\sim$1–51 Å, UV slopes of $\beta \sim -1.6$ to $-2.6$, and half-light radii of $\sim$50–1000 pc. In contrast, C iv-strong sources occupy the tail of these distributions, with C iii] EWs of 16–51 Å, UV slopes $\beta \lesssim -2.5$, compact morphologies ($r_{\rm 50} \lesssim 100$ pc), and elevated star formation surface densities ($\Sigma _{\rm SFR} \gtrsim 100\, M_\odot \, \mathrm{yr}^{-1}\, \mathrm{kpc}^{-2}$). These properties suggest concentrated starbursts that temporarily outshine the host galaxy. Comparing average properties from composite spectra, we find the diversity of the sample is primarily driven by bursty star formation on very short time-scales ($\le$3 Myr), with strong C iv emitters observed at the apex of the bursts and sources devoid of emission lines during relative inactivity. An apparent association between strong C iv and enhanced nitrogen abundance suggests both may be modulated by the same duty cycle, reflecting a generic mode of star formation. We show that active galactic nuclei are unlikely to contribute significantly to this duty cycle based on UV line diagnostics and photoionization models. Our results support a picture whereby brief bursts and lulls can explain the spectral diversity and early growth of bright galaxies in the first 500 Myr. acknowledgement: "We thank the anonymous referee for useful and constructive\r\nfeedback that improved the manuscript. GRB is grateful to Vasily\r\nBelokurov and Sarah Kane for providing the relevant abundances\r\nforthe Aurora data in Fig. 11, as well asto Tiger Yu-Yang Hsiao for\r\nhelpful discussions regarding the MACS 0647-JD source. We are\r\nalso grateful to Gabe Brammerfor useful discussions and his continuous efforts in maintaining and improving the msaexp code,\r\nfrom which the high-z community continues to benefit greatly.\r\nLastly, we also thank the numerous teams of the observational\r\nprograms used in this study, for developing these valuable data\r\nsets. The data used in this study are derived from the following\r\nprograms: 1181 (PI Eisenstein; D. J. Eisenstein et al. 2023a), 1210\r\n(PI Luetzgendorf; D. J. Eisenstein et al. 2023a), 1211 (PI Isaak;\r\nM. V. Maseda et al. 2024), 1286 (PI Luetzgendorf; D. J. Eisenstein\r\net al. 2023a), 1287 (PI Isaak; D. J. Eisenstein et al. 2023a), 1345\r\n(PI Finkelstein; S. L. Finkelstein et al. 2025), 1433 (PI Coe; T. Y.-\r\nY. Hsiao et al. 2024a), 2561 (PI Labbé; R. Bezanson et al. 2022),\r\n2750 (PI Arrabal Haro; P. Arrabal Haro et al. 2023b), 3073 (PI\r\nCastellano; M. Castellano et al. 2024), 3215 (PIs Eisenstein &\r\nMaiolino; D. J. Eisenstein et al. 2023b), 5224 (PIs Oesch & Naidu;\r\nOesch et al. in preparation), 6368 (PI Dickinson; V. Kokorev et al.\r\n2025). The authors acknowledge the aforementioned teams and\r\nPIs where development of their observing program(s) was done\r\nwith a zero-exclusive-access period.\r\nThis work is based on observations made with the\r\nNASA/ESA/CSA JWST. The data were obtained from the\r\nMikulski Archive for Space Telescopes at the Space Telescope\r\nScience Institute, which is operated by the Association of\r\nUniversities for Research in Astronomy, Inc., under NASA\r\ncontract NAS 5-03127 for JWST. The specific observations\r\nanalysed can be accessed via DOI 10.17909/jqj3-ws37. Some\r\nof the data products presented herein were retrieved from the\r\nDawn JWST Archive (DJA). DJA is an initiative of the Cosmic\r\nDawn Center (DAWN), which is funded by the Danish National\r\nResearch Foundation under grant DNRF140.\r\nRSE acknowledges generous financial support from the Peter\r\nand Patricia Gruber Foundation. YF acknowledgessupportsfrom\r\nJSPS KAKENHI Grant Numbers JP22K21349 and JP23K13149.\r\nThis work has received funding from the Swiss State Secretariat\r\nfor Education, Research and Innovation (SERI) under contract\r\nnumber MB22.00072, as well as from the Swiss National Science\r\nFoundation (SNSF) through project grant 200020_207349." article_number: stag701 article_processing_charge: Yes article_type: original arxiv: 1 author: - first_name: Guido full_name: Roberts-Borsani, Guido last_name: Roberts-Borsani - first_name: Pascal A full_name: Oesch, Pascal A last_name: Oesch - first_name: Richard full_name: Ellis, Richard last_name: Ellis - first_name: Andrea full_name: Weibel, Andrea last_name: Weibel - first_name: Emma full_name: Giovinazzo, Emma last_name: Giovinazzo - first_name: Rychard full_name: Bouwens, Rychard last_name: Bouwens - first_name: Pratika full_name: Dayal, Pratika last_name: Dayal - first_name: Adriano full_name: Fontana, Adriano last_name: Fontana - first_name: Kasper E full_name: Heintz, Kasper E last_name: Heintz - first_name: Jorryt J full_name: Matthee, Jorryt J id: 7439a258-f3c0-11ec-9501-9df22fe06720 last_name: Matthee orcid: 0000-0003-2871-127X - first_name: Romain A full_name: Meyer, Romain A last_name: Meyer - first_name: Laura full_name: Pentericci, Laura last_name: Pentericci - first_name: Alice full_name: Shapley, Alice last_name: Shapley - first_name: Sandro full_name: Tacchella, Sandro last_name: Tacchella - first_name: Tommaso full_name: Treu, Tommaso last_name: Treu - first_name: Fabian full_name: Walter, Fabian last_name: Walter - first_name: Hakim full_name: Atek, Hakim last_name: Atek - first_name: Sownak full_name: Bose, Sownak last_name: Bose - first_name: Marco full_name: Castellano, Marco last_name: Castellano - first_name: Yoshinobu full_name: Fudamoto, Yoshinobu last_name: Fudamoto - first_name: Takahiro full_name: Morishita, Takahiro last_name: Morishita - first_name: Rohan P full_name: Naidu, Rohan P last_name: Naidu - first_name: Ryan L full_name: Sanders, Ryan L last_name: Sanders - first_name: Arjen full_name: van der Wel, Arjen last_name: van der Wel citation: ama: 'Roberts-Borsani G, Oesch PA, Ellis R, et al. JWST spectroscopic insights into the diversity of galaxies in the first 500 Myr: Short-lived snapshots along a common evolutionary pathway. Monthly Notices of the Royal Astronomical Society. 2026;548(3). doi:10.1093/mnras/stag701' apa: 'Roberts-Borsani, G., Oesch, P. A., Ellis, R., Weibel, A., Giovinazzo, E., Bouwens, R., … van der Wel, A. (2026). JWST spectroscopic insights into the diversity of galaxies in the first 500 Myr: Short-lived snapshots along a common evolutionary pathway. Monthly Notices of the Royal Astronomical Society. Oxford University Press. https://doi.org/10.1093/mnras/stag701' chicago: 'Roberts-Borsani, Guido, Pascal A Oesch, Richard Ellis, Andrea Weibel, Emma Giovinazzo, Rychard Bouwens, Pratika Dayal, et al. “JWST Spectroscopic Insights into the Diversity of Galaxies in the First 500 Myr: Short-Lived Snapshots along a Common Evolutionary Pathway.” Monthly Notices of the Royal Astronomical Society. Oxford University Press, 2026. https://doi.org/10.1093/mnras/stag701.' ieee: 'G. Roberts-Borsani et al., “JWST spectroscopic insights into the diversity of galaxies in the first 500 Myr: Short-lived snapshots along a common evolutionary pathway,” Monthly Notices of the Royal Astronomical Society, vol. 548, no. 3. Oxford University Press, 2026.' ista: 'Roberts-Borsani G, Oesch PA, Ellis R, Weibel A, Giovinazzo E, Bouwens R, Dayal P, Fontana A, Heintz KE, Matthee JJ, Meyer RA, Pentericci L, Shapley A, Tacchella S, Treu T, Walter F, Atek H, Bose S, Castellano M, Fudamoto Y, Morishita T, Naidu RP, Sanders RL, van der Wel A. 2026. JWST spectroscopic insights into the diversity of galaxies in the first 500 Myr: Short-lived snapshots along a common evolutionary pathway. Monthly Notices of the Royal Astronomical Society. 548(3), stag701.' mla: 'Roberts-Borsani, Guido, et al. “JWST Spectroscopic Insights into the Diversity of Galaxies in the First 500 Myr: Short-Lived Snapshots along a Common Evolutionary Pathway.” Monthly Notices of the Royal Astronomical Society, vol. 548, no. 3, stag701, Oxford University Press, 2026, doi:10.1093/mnras/stag701.' short: G. Roberts-Borsani, P.A. Oesch, R. Ellis, A. Weibel, E. Giovinazzo, R. Bouwens, P. Dayal, A. Fontana, K.E. Heintz, J.J. Matthee, R.A. Meyer, L. Pentericci, A. Shapley, S. Tacchella, T. Treu, F. Walter, H. Atek, S. Bose, M. Castellano, Y. Fudamoto, T. Morishita, R.P. Naidu, R.L. Sanders, A. van der Wel, Monthly Notices of the Royal Astronomical Society 548 (2026). date_created: 2026-05-20T14:34:29Z date_published: 2026-05-01T00:00:00Z date_updated: 2026-05-21T06:16:04Z day: '01' ddc: - '520' department: - _id: JoMa doi: 10.1093/mnras/stag701 external_id: arxiv: - '2508.21708' file: - access_level: open_access checksum: b8f52c6fc5e06b3a505310e7d5898ecf content_type: application/pdf creator: dernst date_created: 2026-05-21T06:14:23Z date_updated: 2026-05-21T06:14:23Z file_id: '21902' file_name: 2026_MNRAS_RobertsBorsani.pdf file_size: 3539140 relation: main_file success: 1 file_date_updated: 2026-05-21T06:14:23Z fulldoi: https://doi.org/10.1093/mnras/stag701 has_accepted_license: '1' intvolume: ' 548' issue: '3' language: - iso: eng month: '05' oa: 1 oa_version: Published Version publication: Monthly Notices of the Royal Astronomical Society publication_identifier: eissn: - 1365-2966 issn: - 0035-8711 publication_status: published publisher: Oxford University Press quality_controlled: '1' scopus_import: '1' status: public title: 'JWST spectroscopic insights into the diversity of galaxies in the first 500 Myr: Short-lived snapshots along a common evolutionary pathway' tmp: image: /images/cc_by.png legal_code_url: https://creativecommons.org/licenses/by/4.0/legalcode name: Creative Commons Attribution 4.0 International Public License (CC-BY 4.0) short: CC BY (4.0) type: journal_article user_id: 2DF688A6-F248-11E8-B48F-1D18A9856A87 volume: 548 year: '2026' ... --- DOAJ_listed: '1' OA_place: publisher OA_type: gold PlanS_conform: '1' _id: '22303' abstract: - lang: eng text: "We present the discovery of AT 2024wpp (‘Whippet’), a fast and luminous 18cow-like transient. At a redshift of z = 0 . 0868 , revealed by Keck Cosmic Web Imager spectroscopy of its faint star-forming host, it is the fourth-nearest example of its class to date. Rapid identification of the source in the Zwicky Transient Facility data stream permitted ultraviolet-through- optical observations to be obtained prior to peak, allowing the first determination of the peak bolometric luminosity ( 2 ×1045 erg s−1 ), maximum photospheric radius ( 1015 cm), and total radiated energy ( 1051 erg) of an 18cow-like object. We present results from a comprehensive multiwavelength observing campaign, including a far-ultraviolet spectrum from the Cosmic Origins Spectrograph on the Hubble Space Telescope and deep imaging extending > 100 d post-explosion from the Very Large Telescope, Hubble Space Telescope , Very Large Array, and Atacama Large Millimetre Array. We interpret the observations under a model in which a rapidly accreting central engine blows a fast ( ∼0.2 c ) wind into the surrounding medium and irradiates it with X-rays. The high Doppler velocities and intense ionization within this wind prevent identifiable spectroscopic features from appearing in the ejecta or in the surrounding circumstellar material. Weak H and He signatures do emerge in the spectra after 35 d in the form of double-peaked narrow lines. Each peak is individually narrow (full width δv ∼3000 km s−1 ) but the two components are separated by \x03v ∼6600 km s−1 , indicating stable structures of denser material, possibly representing streams of tidal ejecta or an ablated companion star." acknowledgement: "We thank Eliot Quataert, Luc Dessart, Ben Margalit, Ross Ferguson, Aaron Tohuvavohu, Brad Cenko, and Jamie Kennea for useful discussions. We thank the referee for helpful suggestions that improved the manuscript.\r\n\r\nBased on observations obtained with the Samuel Oschin Telescope 48-in. and the 60-in. Telescope at the Palomar Observatory as part of the Zwicky Transient Facility project. ZTF is supported by the National Science Foundation under grant no. AST-2034437 and a collaboration including Caltech, IPAC, the Oskar Klein Center at Stockholm University, the University of Maryland, University of California, Berkeley, the University of Wisconsin at Milwaukee, University of Warwick, Ruhr University Bochum, Cornell University, Northwestern University and Drexel University. Operations are conducted by COO, IPAC, and UW.\r\n\r\nThe Liverpool Telescope is operated on the island of La Palma by Liverpool John Moores University in the Spanish Observatorio del Roque de los Muchachos of the Instituto de Astrofisica de Canarias with financial support from the UK Science and Technology Facilities Council.\r\n\r\nBased on observations made with the Nordic Optical Telescope, owned in collaboration by the University of Turku and Aarhus University, and operated jointly by Aarhus University, the University of Turku and the University of Oslo, representing Denmark, Finland and Norway, the University of Iceland and Stockholm University at the Observatorio del Roque de los Muchachos, La Palma, Spain, of the Instituto de Astrofisica de Canarias. The NOT data were obtained under program ID 68–501.\r\n\r\nThis work made use of data supplied by the UK Swift Science Data Centre at the University of Leicester. We are grateful to Phil Evans, Aaron Tohuvavohu, and Jamie Kennea for advice on the Swift/XRT data reduction.\r\n\r\nSome of the data presented herein were obtained at the W. M. Keck Observatory, which is operated as a scientific partnership among the California Institute of Technology, the University of California, and NASA. The Observatory was made possible by the generous financial support of the W. M. Keck Foundation. The authors wish to recognize and acknowledge the very significant cultural role and reverence that the summit of Maunakea has always had within the indigenous Hawaiian community. We are most fortunate to have the opportunity to conduct observations from this mountain.\r\n\r\nSome observations reported here were obtained at the MMT Observatory, a joint facility of the University of Arizona and the Smithsonian Institution.\r\n\r\nThe National Radio Astronomy Observatory and Green Bank Observatory are facilities of the U.S. National Science Foundation operated under cooperative agreement by Associated Universities, Inc. This paper makes use of the following ALMA data: ADS/JAO.ALMA no. 2023.1.01730.T ALMA is a partnership of ESO (representing its member states), NSF (USA) and NINS (Japan), together with NRC (Canada), NSTC and ASIAA (Taiwan), and KASI (Republic of Korea), in cooperation with the Republic of Chile. The Joint ALMA Observatory is operated by ESO, AUI/NRAO, and NAOJ.\r\n\r\nBased on observations collected at the European Organisation for Astronomical Research in the Southern Hemisphere under ESO programme 2114.D-5014(E). We thank John Pritchard and Paula Sanchez Saez, and the entire observatory staff, for their excellent support.\r\n\r\nBased on observations collected at the European Organisation for Astronomical Research in the Southern Hemisphere, Chile, as part of ePESSTO+ (the advanced Public ESO Spectroscopic Survey for Transient Objects Survey – PI: Inserra). ePESSTO+ observations were obtained under ESO program ID 112.25JQ.\r\n\r\nThis research is based on observations made with the NASA/ESA Hubble Space Telescope obtained from the Space Telescope Science Institute, which is operated by the Association of Universities for Research in Astronomy, Inc., under NASA contract NAS 5–26555. These observations are associated with programs 16714, 17477, and 17889.\r\n\r\nBased on observations obtained at the Southern Astrophysical Research (SOAR) telescope, which is a joint project of the Ministério da Ciência, Tecnologia e Inovações (MCTI/LNA) do Brasil, the US National Science Foundation’s NOIRLab, the University of North Carolina at Chapel Hill (UNC), and Michigan State University (MSU).\r\n\r\nThe Pan-STARRS1 Surveys (PS1) and the PS1 public science archive have been made possible through contributions by the Institute for Astronomy, the University of Hawaii, the Pan-STARRS Project Office, the Max-Planck Society and its participating institutes, the Max Planck Institute for Astronomy, Heidelberg and the Max Planck Institute for Extraterrestrial Physics, Garching, The Johns Hopkins University, Durham University, the University of Edinburgh, the Queen’s University Belfast, the Harvard-Smithsonian Center for Astrophysics, the Las Cumbres Observatory Global Telescope Network Incorporated, the National Central University of Taiwan, the Space Telescope Science Institute, the National Aeronautics and Space Administration under grant no. NNX08AR22G issued through the Planetary Science Division of the NASA Science Mission Directorate, the National Science Foundation grant no. AST–1238877, the University of Maryland, Eotvos Lorand University (ELTE), the Los Alamos National Laboratory, and the Gordon and Betty Moore Foundation.\r\n\r\nThis research made use of ccdproc, an astropy package for image reduction (M. Craig et al. 2025).\r\n\r\nGS and AYQH acknowledge support in part from a Sloan Research Fellowship (award no. FG-2024-21320) from the Alfred P. Sloan Foundation. CS and AYQH acknowledge support in part from National Aeronautics and Space Administration (NASA) grant 80NSSC24K0377, from HST grant HST-GO-17477.006-A, and from a Scialog award from the Research Corporation for Science Advancement (‘Early Science with the LSST’).\r\n\r\nPC acknowledges support from the Zhejiang Provincial Top-Level Research Support Program.\r\n\r\nIA and JC are supported by the National Science Foundation award AST 2505775, NASA grant 24-ADAP24-0159, Scialog award SA-LSST-2024-102a, and the Discovery Alliance Catalyst Fellowship Mentors award 2025-62192-CM-19\r\n\r\nAA acknowledges support from the Ministry of Education Yushan Fellow Program (MOE-111-YSFMS-0008-001-P1) and from the National Science and Technology Council, Taiwan (NSTC 114-2112-M-008-021-MY3).\r\n\r\nT-WC acknowledges support from the Ministry of Education Yushan Fellow Program (MOE-111-YSFMS-0008-001-P1) and from the National Science and Technology Council, Taiwan (NSTC 114-2112-M-008-021-MY3).\r\n\r\nERC acknowledges support from the National Aeronautics and Space Administration through the Astrophysics Theory Program, grant 80NSSC24K0897.\r\n\r\nGD acknowledges support from the European Union’s Horizon Europe research and innovation programme under the Marie Skłodowska-Curie grant agreement no. 101199369.\r\n\r\nDF’s contribution to this material is based upon work supported by the National Science Foundation under award no. AST-2401779.\r\n\r\nAGY’s research is supported by ISF, IMOS, and BSF grants, as well as the André Deloro Institute for Space and Optics Research, the Center for Experimental Physics, a WIS-MIT Sagol grant, the Norman E Alexander Family M Foundation ULTRASAT Data Center Fund, and Yeda-Sela; AGY is the incumbent of the The Arlyn Imberman Professorial Chair.\r\n\r\nLG acknowledges financial support from AGAUR, CSIC, MCIN, and AEI 10.13039/501100011033 under projects PID2023-151307NB-I00, PIE 20215AT016, and CEX2020-001058-M.\r\n\r\nMG acknowledges support from an STFC PhD studentship and from the Faculty of Science and Technology at Lancaster University.\r\n\r\nCPG acknowledges financial support from the Secretary of Universities and Research (Government of Catalonia) and by the Horizon 2020 Research and Innovation Programme of the European Union under the Marie Skłodowska-Curie and the Beatriu de Pinós 2021 BP 00168 programme, from the Spanish Ministerio de Ciencia e Innovación (MCIN) and the Agencia Estatal de Investigación (AEI) 10.13039/501100011033 under the PID2023-151307NB-I00 SNNEXT project, from Centro Superior de Investigaciones Científicas (CSIC) under the PIE project 20215AT016 and the program Unidad de Excelencia María de Maeztu CEX2020-001058-M, and from the Departament de Recerca i Universitats de la Generalitat de Catalunya through the 2021-SGR-01270 grant.\r\n\r\nCL is supported by DoE award no.  DE-SC0025599.\r\n\r\nZwicky Transient Facility, W. M. Keck Observatory, and MMT Observatory access was supported by Northwestern University and the Center for Interdisciplinary Exploration and Research in Astrophysics (CIERA).\r\n\r\nAM gratefully acknowledges support from an STFC PhD studentship and the Faculty of Science and Technology at Lancaster University.\r\n\r\nTEMB is funded by Horizon Europe ERC grant no. 101125877.\r\n\r\nMN is supported by the European Research Council (ERC) under the European Union’s Horizon 2020 research and innovation programme (grant agreement no. 948381).\r\n\r\nNR is supported by a Northwestern University Presidential Fellowship Award. We gratefully acknowledge the support of the NSF-Simons AI-Institute for the Sky (SkAI) via grants NSF AST-2421845 and Simons Foundation MPS-AI-00010513.\r\n\r\nAS acknowledges the Warwick Astrophysics PhD prize scholarship made possible thanks to a generous philanthropic donation.\r\n\r\nSJS acknowledges funding from STFC grant ST/Y001605/1, a Royal Society Research Professorship and the Hintze Family Charitable Foundation." article_number: stag678 article_processing_charge: Yes article_type: original arxiv: 1 author: - first_name: Daniel A full_name: Perley, Daniel A last_name: Perley - first_name: Anna Y Q full_name: Ho, Anna Y Q last_name: Ho - first_name: Zoë full_name: McGrath, Zoë last_name: McGrath - first_name: Michael full_name: Camilo, Michael last_name: Camilo - first_name: Cassie full_name: Sevilla, Cassie last_name: Sevilla - first_name: Ping full_name: Chen, Ping last_name: Chen - first_name: Genevieve full_name: Schroeder, Genevieve last_name: Schroeder - first_name: Taya full_name: Govreen-Segal, Taya last_name: Govreen-Segal - first_name: Aleksandra full_name: Bochenek, Aleksandra last_name: Bochenek - first_name: Yu-Jing full_name: Qin, Yu-Jing last_name: Qin - first_name: James H full_name: Gillanders, James H last_name: Gillanders - first_name: Benjamin full_name: Amend, Benjamin last_name: Amend - first_name: Joseph P full_name: Anderson, Joseph P last_name: Anderson - first_name: Igor full_name: Andreoni, Igor last_name: Andreoni - first_name: Amar full_name: Aryan, Amar last_name: Aryan - first_name: Eric C full_name: Bellm, Eric C last_name: Bellm - first_name: Joshua S full_name: Bloom, Joshua S last_name: Bloom - first_name: Thomas full_name: de Boer, Thomas last_name: de Boer - first_name: Jonathan full_name: Carney, Jonathan last_name: Carney - first_name: Ilaria full_name: Caiazzo, Ilaria id: 8ae5b6e7-2a03-11ee-914d-b58ed7a3b47d last_name: Caiazzo orcid: 0000-0002-4770-5388 - first_name: Ken C full_name: Chambers, Ken C last_name: Chambers - first_name: Panos full_name: Charalampopoulos, Panos last_name: Charalampopoulos - first_name: Ting-Wan full_name: Chen, Ting-Wan last_name: Chen - first_name: Tracy X full_name: Chen, Tracy X last_name: Chen - first_name: Eric R full_name: Coughlin, Eric R last_name: Coughlin - first_name: Michael full_name: Coughlin, Michael last_name: Coughlin - first_name: Michel full_name: Dennefeld, Michel last_name: Dennefeld - first_name: Georgios full_name: Dimitriadis, Georgios last_name: Dimitriadis - first_name: Christoffer full_name: Fremling, Christoffer last_name: Fremling - first_name: Danielle full_name: Frostig, Danielle last_name: Frostig - first_name: Avishay full_name: Gal-Yam, Avishay last_name: Gal-Yam - first_name: Lluís full_name: Galbany, Lluís last_name: Galbany - first_name: Anjashay full_name: Gangopadhyay, Anjashay last_name: Gangopadhyay - first_name: Melzie full_name: Ghendrih, Melzie last_name: Ghendrih - first_name: Matthew J full_name: Graham, Matthew J last_name: Graham - first_name: Mariusz full_name: Gromadzki, Mariusz last_name: Gromadzki - first_name: Steven L full_name: Groom, Steven L last_name: Groom - first_name: Claudia P full_name: Gutiérrez, Claudia P last_name: Gutiérrez - first_name: K -Ryan full_name: Hinds, K -Ryan last_name: Hinds - first_name: Mark E full_name: Huber, Mark E last_name: Huber - first_name: Cosimo full_name: Inserra, Cosimo last_name: Inserra - first_name: Benjamin C full_name: Kaiser, Benjamin C last_name: Kaiser - first_name: Mansi M full_name: Kasliwal, Mansi M last_name: Kasliwal - first_name: Niilo E full_name: Koivisto, Niilo E last_name: Koivisto - first_name: Chien-Cheng full_name: Lin, Chien-Cheng last_name: Lin - first_name: Chang full_name: Liu, Chang last_name: Liu - first_name: Thomas B full_name: Lowe, Thomas B last_name: Lowe - first_name: Eugene full_name: Magnier, Eugene last_name: Magnier - first_name: Ashish A full_name: Mahabal, Ashish A last_name: Mahabal - first_name: Andrew full_name: Milligan, Andrew last_name: Milligan - first_name: Paloma full_name: Minguez, Paloma last_name: Minguez - first_name: Geoffrey full_name: Mo, Geoffrey last_name: Mo - first_name: Tomás E full_name: Müller-Bravo, Tomás E last_name: Müller-Bravo - first_name: Matt full_name: Nicholl, Matt last_name: Nicholl - first_name: Priscila J full_name: Pessi, Priscila J last_name: Pessi - first_name: Giuliano full_name: Pignata, Giuliano last_name: Pignata - first_name: Josiah full_name: Purdum, Josiah last_name: Purdum - first_name: Nabeel full_name: Rehemtulla, Nabeel last_name: Rehemtulla - first_name: R Michael full_name: Rich, R Michael last_name: Rich - first_name: Anwesha full_name: Sahu, Anwesha last_name: Sahu - first_name: Avinash full_name: Singh, Avinash last_name: Singh - first_name: Stephen J full_name: Smartt, Stephen J last_name: Smartt - first_name: Ian A full_name: Smith, Ian A last_name: Smith - first_name: Jesper full_name: Sollerman, Jesper last_name: Sollerman - first_name: Gokul full_name: Srinivasaragavan, Gokul last_name: Srinivasaragavan - first_name: Shubham full_name: Srivastav, Shubham last_name: Srivastav - first_name: Robert D full_name: Stein, Robert D last_name: Stein - first_name: Steve full_name: Schulze, Steve last_name: Schulze - first_name: Jack W full_name: Tweddle, Jack W last_name: Tweddle - first_name: Richard full_name: Wainscoat, Richard last_name: Wainscoat - first_name: Jacob L full_name: Wise, Jacob L last_name: Wise - first_name: Lin full_name: Yan, Lin last_name: Yan - first_name: David R full_name: Young, David R last_name: Young citation: ama: 'Perley DA, Ho AYQ, McGrath Z, et al. AT 2024wpp: An extremely luminous fast ultraviolet transient powered by accretion onto a black hole. Monthly Notices of the Royal Astronomical Society. 2026;549(1). doi:10.1093/mnras/stag678' apa: 'Perley, D. A., Ho, A. Y. Q., McGrath, Z., Camilo, M., Sevilla, C., Chen, P., … Young, D. R. (2026). AT 2024wpp: An extremely luminous fast ultraviolet transient powered by accretion onto a black hole. Monthly Notices of the Royal Astronomical Society. Oxford University Press. https://doi.org/10.1093/mnras/stag678' chicago: 'Perley, Daniel A, Anna Y Q Ho, Zoë McGrath, Michael Camilo, Cassie Sevilla, Ping Chen, Genevieve Schroeder, et al. “AT 2024wpp: An Extremely Luminous Fast Ultraviolet Transient Powered by Accretion onto a Black Hole.” Monthly Notices of the Royal Astronomical Society. Oxford University Press, 2026. https://doi.org/10.1093/mnras/stag678.' ieee: 'D. A. Perley et al., “AT 2024wpp: An extremely luminous fast ultraviolet transient powered by accretion onto a black hole,” Monthly Notices of the Royal Astronomical Society, vol. 549, no. 1. Oxford University Press, 2026.' ista: 'Perley DA, Ho AYQ, McGrath Z, Camilo M, Sevilla C, Chen P, Schroeder G, Govreen-Segal T, Bochenek A, Qin Y-J, Gillanders JH, Amend B, Anderson JP, Andreoni I, Aryan A, Bellm EC, Bloom JS, de Boer T, Carney J, Caiazzo I, Chambers KC, Charalampopoulos P, Chen T-W, Chen TX, Coughlin ER, Coughlin M, Dennefeld M, Dimitriadis G, Fremling C, Frostig D, Gal-Yam A, Galbany L, Gangopadhyay A, Ghendrih M, Graham MJ, Gromadzki M, Groom SL, Gutiérrez CP, Hinds K-R, Huber ME, Inserra C, Kaiser BC, Kasliwal MM, Koivisto NE, Lin C-C, Liu C, Lowe TB, Magnier E, Mahabal AA, Milligan A, Minguez P, Mo G, Müller-Bravo TE, Nicholl M, Pessi PJ, Pignata G, Purdum J, Rehemtulla N, Rich RM, Sahu A, Singh A, Smartt SJ, Smith IA, Sollerman J, Srinivasaragavan G, Srivastav S, Stein RD, Schulze S, Tweddle JW, Wainscoat R, Wise JL, Yan L, Young DR. 2026. AT 2024wpp: An extremely luminous fast ultraviolet transient powered by accretion onto a black hole. Monthly Notices of the Royal Astronomical Society. 549(1), stag678.' mla: 'Perley, Daniel A., et al. “AT 2024wpp: An Extremely Luminous Fast Ultraviolet Transient Powered by Accretion onto a Black Hole.” Monthly Notices of the Royal Astronomical Society, vol. 549, no. 1, stag678, Oxford University Press, 2026, doi:10.1093/mnras/stag678.' short: D.A. Perley, A.Y.Q. Ho, Z. McGrath, M. Camilo, C. Sevilla, P. Chen, G. Schroeder, T. Govreen-Segal, A. Bochenek, Y.-J. Qin, J.H. Gillanders, B. Amend, J.P. Anderson, I. Andreoni, A. Aryan, E.C. Bellm, J.S. Bloom, T. de Boer, J. Carney, I. Caiazzo, K.C. Chambers, P. Charalampopoulos, T.-W. Chen, T.X. Chen, E.R. Coughlin, M. Coughlin, M. Dennefeld, G. Dimitriadis, C. Fremling, D. Frostig, A. Gal-Yam, L. Galbany, A. Gangopadhyay, M. Ghendrih, M.J. Graham, M. Gromadzki, S.L. Groom, C.P. Gutiérrez, K.-R. Hinds, M.E. Huber, C. Inserra, B.C. Kaiser, M.M. Kasliwal, N.E. Koivisto, C.-C. Lin, C. Liu, T.B. Lowe, E. Magnier, A.A. Mahabal, A. Milligan, P. Minguez, G. Mo, T.E. Müller-Bravo, M. Nicholl, P.J. Pessi, G. Pignata, J. Purdum, N. Rehemtulla, R.M. Rich, A. Sahu, A. Singh, S.J. Smartt, I.A. Smith, J. Sollerman, G. Srinivasaragavan, S. Srivastav, R.D. Stein, S. Schulze, J.W. Tweddle, R. Wainscoat, J.L. Wise, L. Yan, D.R. Young, Monthly Notices of the Royal Astronomical Society 549 (2026). das_tickbox: '1' dataavailabilitystatement: All photometry is provided in the supplementary data files. Spectroscopy will be made available on WISEREP, and is available on request to the lead author. date_created: 2026-07-13T10:50:10Z date_published: 2026-06-01T00:00:00Z date_updated: 2026-07-13T14:36:24Z day: '01' ddc: - '520' department: - _id: IlCa doi: 10.1093/mnras/stag678 external_id: arxiv: - '2601.03337' file: - access_level: open_access checksum: a5827b9f68f1731b8c8df18142c0ef38 content_type: application/pdf creator: dernst date_created: 2026-07-13T14:35:34Z date_updated: 2026-07-13T14:35:34Z file_id: '22314' file_name: 2026_MNRAS_Perley.pdf file_size: 6208809 relation: main_file success: 1 file_date_updated: 2026-07-13T14:35:34Z fulldoi: https://doi.org/10.1093/mnras/stag678 has_accepted_license: '1' intvolume: ' 549' issue: '1' keyword: - 'stars: black holes' - 'supernovae: individual: AT2024wpp' - 'radio continuum: transients' language: - iso: eng month: '06' oa: 1 oa_version: Published Version publication: Monthly Notices of the Royal Astronomical Society publication_identifier: eissn: - 1365-2966 issn: - 0035-8711 publication_status: published publisher: Oxford University Press quality_controlled: '1' researchdata_availability: upon request scopus_import: '1' status: public supplementarymaterial: yes title: 'AT 2024wpp: An extremely luminous fast ultraviolet transient powered by accretion onto a black hole' tmp: image: /images/cc_by.png legal_code_url: https://creativecommons.org/licenses/by/4.0/legalcode name: Creative Commons Attribution 4.0 International Public License (CC-BY 4.0) short: CC BY (4.0) type: journal_article user_id: 2DF688A6-F248-11E8-B48F-1D18A9856A87 volume: 549 year: '2026' ... --- DOAJ_listed: '1' OA_place: publisher OA_type: gold PlanS_conform: '1' _id: '22676' abstract: - lang: eng text: 'We search for a population-level signature of gravitational-wave recoiling supermassive black holes: a positive correlation between dust obscuration and the magnitude of the line-of-sight velocity offset of broad emission lines relative to the host. Using the SDSS DR16 quasar catalogue, we estimate the velocity offset, $\Delta v$, as the difference between the broad H$\beta$ redshift and a noise-weighted redshift from narrow lines ([O iii] 5007, [O ii] 3728, and Ca ii 3934). We adopt the redshift-relative colour excess $\Delta (g-i)$ as a proxy for dust column density. Analysing $\sim 10^{5}$ quasars that meet basic spectral quality requirements, we find a modest but highly significant positive correlation between $|\Delta v|$ and $\Delta (g-i)$ (Spearman $r\simeq 0.12$ and Pearson $r\simeq 0.13$, with $p\ll 10^{-10}$ in both cases). The fraction of highly obscured quasars increases with $|\Delta v|$, indicating that the correlation is driven by a dust-reddened subpopulation. The result is robust to the choice of minimum $|\Delta v|$ threshold and to the line redshift estimator (peak vs. centroid). As expected, the correlation is largely absent when velocity offsets are computed between narrow emission lines. We find systematic differences between redshifted and blueshifted subsamples, which may point to residual velocity biases or additional physical effects (e.g. winds, inflows, orientation-dependent obscuration, or asymmetric broad-line regions). Recoiling massive black holes provide a natural explanation for the observed correlation, but alternative scenarios should be explored. If confirmed, this would enable population-level constraints on massive black hole merger rates, recoil dynamics, and active galactic nuclei disc properties.' acknowledgement: We thank Paul Hewett for useful discussions, and Qiaoya Wu for guidance on the data presented in Q. Wu & Y. Shen (2022). ZH acknowledges financial support from NASA grants 80NSSC24K0440 and 80NSSC22K0822. PR and ZF have received funding from the HUN-REN Hungarian Research Network and were supported by the NKFIH excellence grant TKP2021-NKTA-64. article_number: stag1367 article_processing_charge: Yes article_type: original arxiv: 1 author: - first_name: Bence full_name: Bécsy, Bence last_name: Bécsy - first_name: Peter full_name: Raffai, Peter last_name: Raffai - first_name: Zoltán full_name: Haiman, Zoltán id: 7c006e8c-cc0d-11ee-8322-cb904ef76f36 last_name: Haiman orcid: 0000-0003-3633-5403 - first_name: Andor full_name: Budai, Andor last_name: Budai - first_name: Zsolt full_name: Frei, Zsolt last_name: Frei citation: ama: Bécsy B, Raffai P, Haiman Z, Budai A, Frei Z. Statistical evidence for massive black hole recoils in active galactic nuclei. Monthly Notices of the Royal Astronomical Society. 2026;550(4). doi:10.1093/mnras/stag1367 apa: Bécsy, B., Raffai, P., Haiman, Z., Budai, A., & Frei, Z. (2026). Statistical evidence for massive black hole recoils in active galactic nuclei. Monthly Notices of the Royal Astronomical Society. Oxford University Press. https://doi.org/10.1093/mnras/stag1367 chicago: Bécsy, Bence, Peter Raffai, Zoltán Haiman, Andor Budai, and Zsolt Frei. “Statistical Evidence for Massive Black Hole Recoils in Active Galactic Nuclei.” Monthly Notices of the Royal Astronomical Society. Oxford University Press, 2026. https://doi.org/10.1093/mnras/stag1367. ieee: B. Bécsy, P. Raffai, Z. Haiman, A. Budai, and Z. Frei, “Statistical evidence for massive black hole recoils in active galactic nuclei,” Monthly Notices of the Royal Astronomical Society, vol. 550, no. 4. Oxford University Press, 2026. ista: Bécsy B, Raffai P, Haiman Z, Budai A, Frei Z. 2026. Statistical evidence for massive black hole recoils in active galactic nuclei. Monthly Notices of the Royal Astronomical Society. 550(4), stag1367. mla: Bécsy, Bence, et al. “Statistical Evidence for Massive Black Hole Recoils in Active Galactic Nuclei.” Monthly Notices of the Royal Astronomical Society, vol. 550, no. 4, stag1367, Oxford University Press, 2026, doi:10.1093/mnras/stag1367. short: B. Bécsy, P. Raffai, Z. Haiman, A. Budai, Z. Frei, Monthly Notices of the Royal Astronomical Society 550 (2026). das_tickbox: '1' dataavailabilitystatement: The data and software that support the findings of this study are openly available. The processed data sets, analysis outputs, and software are archived on Zenodo (B. Bécsy et al. 2026a), and are also available on GitHub (B. Bécsy et al. 2026b). date_created: 2026-08-11T06:19:34Z date_published: 2026-08-01T00:00:00Z date_updated: 2026-08-11T06:55:10Z day: '01' ddc: - '520' department: - _id: ZoHa doi: 10.1093/mnras/stag1367 external_id: arxiv: - '2605.04781' file: - access_level: open_access checksum: 85a01a4e163e4d2eccebe2472cdb453f content_type: application/pdf creator: dernst date_created: 2026-08-11T06:53:09Z date_updated: 2026-08-11T06:53:09Z file_id: '22681' file_name: 2026_MNRAS_Becsy.pdf file_size: 3792460 relation: main_file success: 1 file_date_updated: 2026-08-11T06:53:09Z fulldoi: https://doi.org/10.1093/mnras/stag1367 has_accepted_license: '1' intvolume: ' 550' issue: '4' language: - iso: eng month: '08' oa: 1 oa_version: Published Version publication: Monthly Notices of the Royal Astronomical Society publication_identifier: eissn: - 1365-2966 issn: - 0035-8711 publication_status: published publisher: Oxford University Press quality_controlled: '1' researchdata_availability: yes scopus_import: '1' status: public supplementarymaterial: no title: Statistical evidence for massive black hole recoils in active galactic nuclei tmp: image: /images/cc_by.png legal_code_url: https://creativecommons.org/licenses/by/4.0/legalcode name: Creative Commons Attribution 4.0 International Public License (CC-BY 4.0) short: CC BY (4.0) type: journal_article user_id: 2DF688A6-F248-11E8-B48F-1D18A9856A87 volume: 550 year: '2026' ... --- DOAJ_listed: '1' OA_place: publisher OA_type: gold PlanS_conform: '1' _id: '22960' abstract: - lang: eng text: "We construct and characterize a sample of 146 little red dots (LRDs) across 2.0Monthly Notices of the Royal Astronomical Society. 2026;551(3). doi:10.1093/mnras/stag1567' apa: 'de Graaff, A., Hviding, R. E., Naidu, R. P., Greene, J. E., Miller, T. B., Leja, J., … van der Wel, A. (2026). Little red dots host black hole stars: A unified family of gas-reddened AGN revealed by JWST/NIRSpec spectroscopy. Monthly Notices of the Royal Astronomical Society. Oxford University Press. https://doi.org/10.1093/mnras/stag1567' chicago: 'de Graaff, Anna, Raphael E Hviding, Rohan P Naidu, Jenny E Greene, Tim B Miller, Joel Leja, Jorryt J Matthee, et al. “Little Red Dots Host Black Hole Stars: A Unified Family of Gas-Reddened AGN Revealed by JWST/NIRSpec Spectroscopy.” Monthly Notices of the Royal Astronomical Society. Oxford University Press, 2026. https://doi.org/10.1093/mnras/stag1567.' ieee: 'A. de Graaff et al., “Little red dots host black hole stars: A unified family of gas-reddened AGN revealed by JWST/NIRSpec spectroscopy,” Monthly Notices of the Royal Astronomical Society, vol. 551, no. 3. Oxford University Press, 2026.' ista: 'de Graaff A, Hviding RE, Naidu RP, Greene JE, Miller TB, Leja J, Matthee JJ, Brammer G, Katz H, Bezanson R, Boogaard LA, Bose S, Chisholm J, Cleri NJ, Dayal P, Feldmann R, Fudamoto Y, Fujimoto S, Furtak LJ, Glazebrook K, Gottumukkala R, Heintz KE, Kokorev V, Labbe I, Maseda MV, McConachie I, Nanayakkara T, Nelson E, Nowaczyk P, Oesch PA, Rix H-W, Setton DJ, Torralba Torregrosa A, Walter F, Wang B, Weibel A, van der Wel A. 2026. Little red dots host black hole stars: A unified family of gas-reddened AGN revealed by JWST/NIRSpec spectroscopy. Monthly Notices of the Royal Astronomical Society. 551(3), stag1567.' mla: 'de Graaff, Anna, et al. “Little Red Dots Host Black Hole Stars: A Unified Family of Gas-Reddened AGN Revealed by JWST/NIRSpec Spectroscopy.” Monthly Notices of the Royal Astronomical Society, vol. 551, no. 3, stag1567, Oxford University Press, 2026, doi:10.1093/mnras/stag1567.' short: A. de Graaff, R.E. Hviding, R.P. Naidu, J.E. Greene, T.B. Miller, J. Leja, J.J. Matthee, G. Brammer, H. Katz, R. Bezanson, L.A. Boogaard, S. Bose, J. Chisholm, N.J. Cleri, P. Dayal, R. Feldmann, Y. Fudamoto, S. Fujimoto, L.J. Furtak, K. Glazebrook, R. Gottumukkala, K.E. Heintz, V. Kokorev, I. Labbe, M.V. Maseda, I. McConachie, T. Nanayakkara, E. Nelson, P. Nowaczyk, P.A. Oesch, H.-W. Rix, D.J. Setton, A. Torralba Torregrosa, F. Walter, B. Wang, A. Weibel, A. van der Wel, Monthly Notices of the Royal Astronomical Society 551 (2026). das_tickbox: '1' dataavailabilitystatement: "All data used in this work are publicly available through the\r\nDAWN JWST Archive (https://dawn-cph.github.io/dja/index.h\r\ntml). The spectra used in this work are part of version 4.5 of the\r\nDJA (G. Brammer & F. Valentino 2025). We also release our complete LRD catalogue, together with all key measurements made All data used in this work are publicly available through the\r\nDAWN JWST Archive (https://dawn-cph.github.io/dja/index.h\r\ntml). The spectra used in this work are part of version 4.5 of the\r\nDJA (G. Brammer & F. Valentino 2025). We also release our complete LRD catalogue, together with all key measurements made in the modified blackbody fitting and emission-line fitting. The\r\ntable can be found at https://doi.org/10.5281/zenodo.21977747,\r\nand its contents are described in Appendix B.\r\n\r\n" date_created: 2026-09-17T11:06:40Z date_published: 2026-09-01T00:00:00Z date_updated: 2026-10-01T11:31:16Z day: '01' ddc: - '520' department: - _id: JoMa doi: 10.1093/mnras/stag1567 external_id: arxiv: - '2511.21820' file: - access_level: open_access checksum: a82b93954671a12bb60d8d7a4a4d526b content_type: application/pdf creator: dernst date_created: 2026-10-01T11:25:20Z date_updated: 2026-10-01T11:25:20Z file_id: '23026' file_name: 2026_MonthNoticesRAS_deGraaff.pdf file_size: 14983705 relation: main_file success: 1 file_date_updated: 2026-10-01T11:25:20Z fulldoi: https://doi.org/10.1093/mnras/stag1567 has_accepted_license: '1' intvolume: ' 551' issue: '3' language: - iso: eng month: '09' oa: 1 oa_version: Published Version publication: Monthly Notices of the Royal Astronomical Society publication_identifier: eissn: - 1365-2966 issn: - 0035-8711 publication_status: published publisher: Oxford University Press quality_controlled: '1' researchdata_availability: yes scopus_import: '1' status: public supplementarymaterial: yes title: 'Little red dots host black hole stars: A unified family of gas-reddened AGN revealed by JWST/NIRSpec spectroscopy' tmp: image: /images/cc_by.png legal_code_url: https://creativecommons.org/licenses/by/4.0/legalcode name: Creative Commons Attribution 4.0 International Public License (CC-BY 4.0) short: CC BY (4.0) type: journal_article user_id: 2DF688A6-F248-11E8-B48F-1D18A9856A87 volume: 551 year: '2026' ... --- DOAJ_listed: '1' OA_place: publisher OA_type: gold _id: '23150' abstract: - lang: eng text: "High-redshift supermassive black holes (SMBHs) have challenged our understanding of black hole formation and growth. The ‘heavy-seed’ pathway eases the problem with the progenitors of these SMBHs having birth masses up to∼105 M\x03. Here, we investigate the possibility that a local dwarf galaxy, Leo I, harbours a heavy-seed descendant. Using Monte Carlo merger trees to generate the merger histories of 1000 dark matter haloes similar to the Milky Way (MW), we search for Leo- like satellite haloes and investigate the probability that the progenitors of these satellites formed a heavy seed. We derive the likelihood of such ‘heavy-seed survivors’ (HSSs) across various formation and survival criteria as well as Leo-similarity criteria. We find that the virial temperature for the onset of atomic cooling and rapid gas infall that yields heavy seeds, Tact , has the largest impact on HSS frequency. We find HSSs in a fraction 0.7 per cent, 18.1 per cent, and 96.5 per cent of MW-like haloes when Tact is set to 9000, 7000, and 5000 K, respectively. For the canonical atomic-cooling threshold ( Tact \x02 8000 K), the HSS fraction is\x03 1per cent , indicating that Leo I hosting a heavy-seed descendant is unlikely under well-motivated physical assumptions. Higher HSS fractions occur only under optimistic and currently unsubstantiated assumptions on Tact . Nevertheless, these results motivate future work that clarifies the possibility of heavy-seed BH formation in pristine haloes with nominal virial temperatures below 8000 K. This may motivate Leo I as a target for disentangling heavy seeds from other SMBH formation mechanisms." acknowledgement: We thank the anonymous reviewer for feedback that helped clarify this manuscript. ZH acknowledges support from NSF grant AST-2006176. FP acknowledges support from the Black Hole Initiative at Harvard University, which is funded by grants from the John Templeton Foundation and the Gordon and Betty Moore Foundation. Merger tree generation and analysis were performed with NSF’s ACCESS allocations AST-120046 and AST-140041 on the Stampede3 resource. The freely available plotting library matplotlib (J. D. Hunter 2007) was used to construct the plots in this paper. article_number: stag1839 article_processing_charge: Yes article_type: original arxiv: 1 author: - first_name: Matthew T. full_name: Scoggins, Matthew T. last_name: Scoggins - first_name: Zoltán full_name: Haiman, Zoltán id: 7c006e8c-cc0d-11ee-8322-cb904ef76f36 last_name: Haiman orcid: 0000-0003-3633-5403 - first_name: Fabio full_name: Pacucci, Fabio last_name: Pacucci citation: ama: 'Scoggins MT, Haiman Z, Pacucci F. Heavy black hole seed survivors in dwarf galaxies: A case study of Leo I. Monthly Notices of the Royal Astronomical Society. 2026;552(3). doi:10.1093/mnras/stag1839' apa: 'Scoggins, M. T., Haiman, Z., & Pacucci, F. (2026). Heavy black hole seed survivors in dwarf galaxies: A case study of Leo I. Monthly Notices of the Royal Astronomical Society. Oxford University Press. https://doi.org/10.1093/mnras/stag1839' chicago: 'Scoggins, Matthew T., Zoltán Haiman, and Fabio Pacucci. “Heavy Black Hole Seed Survivors in Dwarf Galaxies: A Case Study of Leo I.” Monthly Notices of the Royal Astronomical Society. Oxford University Press, 2026. https://doi.org/10.1093/mnras/stag1839.' ieee: 'M. T. Scoggins, Z. Haiman, and F. Pacucci, “Heavy black hole seed survivors in dwarf galaxies: A case study of Leo I,” Monthly Notices of the Royal Astronomical Society, vol. 552, no. 3. Oxford University Press, 2026.' ista: 'Scoggins MT, Haiman Z, Pacucci F. 2026. Heavy black hole seed survivors in dwarf galaxies: A case study of Leo I. Monthly Notices of the Royal Astronomical Society. 552(3), stag1839.' mla: 'Scoggins, Matthew T., et al. “Heavy Black Hole Seed Survivors in Dwarf Galaxies: A Case Study of Leo I.” Monthly Notices of the Royal Astronomical Society, vol. 552, no. 3, stag1839, Oxford University Press, 2026, doi:10.1093/mnras/stag1839.' short: M.T. Scoggins, Z. Haiman, F. Pacucci, Monthly Notices of the Royal Astronomical Society 552 (2026). das_tickbox: '1' dataavailabilitystatement: The code used to analyse the merger trees and generate figures for this manuscript is available at this GitHub repository. All other data will be shared upon reasonable request to the corresponding author. date_created: 2026-10-18T22:01:51Z date_published: 2026-11-01T00:00:00Z date_updated: 2026-10-19T07:05:55Z day: '01' ddc: - '520' department: - _id: ZoHa doi: 10.1093/mnras/stag1839 external_id: arxiv: - '2511.04736' file: - access_level: open_access checksum: 99a35f1305b7f1ed3813bcd51ba16724 content_type: application/pdf creator: dernst date_created: 2026-10-19T07:05:43Z date_updated: 2026-10-19T07:05:43Z file_id: '23164' file_name: 2026_MonthNoticesRAS_Scoggins.pdf file_size: 1450204 relation: main_file success: 1 file_date_updated: 2026-10-19T07:05:43Z fulldoi: https://doi.org/10.1093/mnras/stag1839 has_accepted_license: '1' intvolume: ' 552' issue: '3' language: - iso: eng month: '11' oa: 1 oa_version: Published Version publication: Monthly Notices of the Royal Astronomical Society publication_identifier: eissn: - 1365-2966 issn: - 0035-8711 publication_status: published publisher: Oxford University Press quality_controlled: '1' researchdata_availability: yes scopus_import: '1' status: public supplementarymaterial: no title: 'Heavy black hole seed survivors in dwarf galaxies: A case study of Leo I' tmp: image: /images/cc_by.png legal_code_url: https://creativecommons.org/licenses/by/4.0/legalcode name: Creative Commons Attribution 4.0 International Public License (CC-BY 4.0) short: CC BY (4.0) type: journal_article user_id: 2DF688A6-F248-11E8-B48F-1D18A9856A87 volume: 552 year: '2026' ... --- DOAJ_listed: '1' OA_place: publisher OA_type: gold PlanS_conform: '1' _id: '23199' abstract: - lang: eng text: The physics governing the morphology of radio-loud active galactic nucleus (AGN) jets is not fully understood. We investigate how magnetization, flickering jet power and the interplay between them affects the morphology of radio galaxies. We present a grid of relativistic magnetohydrodynamic simulations using the pluto code covering constant and variable jets with two levels of magnetization. We find that the constant high-magnetization jets can lead to highly asymmetrical cocoon morphologies, while the variable high-magnetization jet can exhibit a broken morphology, caused by a discontinuous jet beam. Our work highlights the importance of magnetization and variability on the stability and resulting morphology of radio-loud AGN jets, suggesting both are significant factors in addition to jet power or environment. Furthermore, we show that the interaction between magnetization and variability can lead to the development of localized kink instabilities along the jet beam. Finally, we discuss the effects of hydrodynamic mixing in low-magnetization jets and the role of viewing-angle dependence in comparisons between our simulations and observed sources. To facilitate this comparison we present a library of simulated radio images at different times in the simulations and from various viewing angles, which highlight a diverse set of complex morphologies. acknowledgement: 'JHM and ELE acknowledge funding from a Royal Society University Research Fellowship (URF\R1\221062). AJC acknowledges support from the Oxford Hintze Centre for Astrophysical Surveys, which is funded through generous support from the Hintze Family Charitable Foundation. HW acknowledges funding by the Science and Technology Facilities Council Grant Number ST/W000903/1 and the ISTA-Fellow programme. The authors acknowledge the use of resources provided by the Isambard 3 Tier-2 HPC Facility. Isambard 3 is hosted by the University of Bristol and operated by the GW4 Alliance (https://gw4.ac.uk) and is funded by UK Research and Innovation and the Engineering and Physical Sciences Research Council (EP/X039137/1). The authors would like to acknowledge the use of the University of Oxford Advanced Research Computing (ARC) facility in carrying out this work (https://doi.org/10.5281/zenodo.22558). We are grateful for the use of the following software packages: pluto (A. Mignone et al. 2007) and matplotlib (J. D. Hunter 2007). We are grateful to Dipanjan Mukherjee, Imogen Whittam, Matt Jarvis, Judith Croston and Fraser Cowie for useful discussions. The authors wish to thank the anonymous referee for their helpful and constructive comments which have improved the quality of this manuscript.' article_number: stag1798 article_processing_charge: Yes article_type: original arxiv: 1 author: - first_name: Emma L full_name: Elley, Emma L last_name: Elley - first_name: James H full_name: Matthews, James H last_name: Matthews - first_name: Henry William full_name: Whitehead, Henry William id: b5363ed7-0345-11f1-8029-eef7ff5d6bfc last_name: Whitehead orcid: 0009-0006-0716-0965 - first_name: Alex J full_name: Cooper, Alex J last_name: Cooper citation: ama: Elley EL, Matthews JH, Whitehead HW, Cooper AJ. The impact of flickering variability and magnetization on the dynamics, stability, and morphology of radio-loud AGN jets. Monthly Notices of the Royal Astronomical Society. 2026;552(4). doi:10.1093/mnras/stag1798 apa: Elley, E. L., Matthews, J. H., Whitehead, H. W., & Cooper, A. J. (2026). The impact of flickering variability and magnetization on the dynamics, stability, and morphology of radio-loud AGN jets. Monthly Notices of the Royal Astronomical Society. Oxford University Press. https://doi.org/10.1093/mnras/stag1798 chicago: Elley, Emma L, James H Matthews, Henry William Whitehead, and Alex J Cooper. “The Impact of Flickering Variability and Magnetization on the Dynamics, Stability, and Morphology of Radio-Loud AGN Jets.” Monthly Notices of the Royal Astronomical Society. Oxford University Press, 2026. https://doi.org/10.1093/mnras/stag1798. ieee: E. L. Elley, J. H. Matthews, H. W. Whitehead, and A. J. Cooper, “The impact of flickering variability and magnetization on the dynamics, stability, and morphology of radio-loud AGN jets,” Monthly Notices of the Royal Astronomical Society, vol. 552, no. 4. Oxford University Press, 2026. ista: Elley EL, Matthews JH, Whitehead HW, Cooper AJ. 2026. The impact of flickering variability and magnetization on the dynamics, stability, and morphology of radio-loud AGN jets. Monthly Notices of the Royal Astronomical Society. 552(4), stag1798. mla: Elley, Emma L., et al. “The Impact of Flickering Variability and Magnetization on the Dynamics, Stability, and Morphology of Radio-Loud AGN Jets.” Monthly Notices of the Royal Astronomical Society, vol. 552, no. 4, stag1798, Oxford University Press, 2026, doi:10.1093/mnras/stag1798. short: E.L. Elley, J.H. Matthews, H.W. Whitehead, A.J. Cooper, Monthly Notices of the Royal Astronomical Society 552 (2026). das_tickbox: '1' dataavailabilitystatement: The data underlying this article are available from the authors on reasonable request. Furthermore, the data for the simulated radio images from various angles as discussed in Section 2.3 are publicly available as FITS files from https://doi.org/10.5281/zenodo.20140021. date_created: 2026-10-27T10:39:59Z date_published: 2026-11-01T00:00:00Z date_updated: 2026-10-28T08:19:37Z day: '01' ddc: - '520' department: - _id: ZoHa doi: 10.1093/mnras/stag1798 external_id: arxiv: - '2605.13469' file: - access_level: open_access checksum: 57e15f531d22d18eaeca96d58b2ab911 content_type: application/pdf creator: dernst date_created: 2026-10-28T08:19:16Z date_updated: 2026-10-28T08:19:16Z file_id: '23203' file_name: 2026_MonthNoticesRAS_Elley.pdf file_size: 8344810 relation: main_file success: 1 file_date_updated: 2026-10-28T08:19:16Z fulldoi: https://doi.org/10.1093/mnras/stag1798 has_accepted_license: '1' intvolume: ' 552' issue: '4' language: - iso: eng month: '11' oa: 1 oa_version: Published Version publication: Monthly Notices of the Royal Astronomical Society publication_identifier: eissn: - 1365-2966 issn: - 0035-8711 publication_status: published publisher: Oxford University Press quality_controlled: '1' researchdata_availability: upon request scopus_import: '1' status: public supplementarymaterial: yes title: The impact of flickering variability and magnetization on the dynamics, stability, and morphology of radio-loud AGN jets tmp: image: /images/cc_by.png legal_code_url: https://creativecommons.org/licenses/by/4.0/legalcode name: Creative Commons Attribution 4.0 International Public License (CC-BY 4.0) short: CC BY (4.0) type: journal_article user_id: 2DF688A6-F248-11E8-B48F-1D18A9856A87 volume: 552 year: '2026' ... --- DOAJ_listed: '1' OA_place: publisher OA_type: gold PlanS_conform: '1' _id: '21063' abstract: - lang: eng text: "We report the detection of a 13σ Hα emission line from HDF850.1 at z = 5.188 ± 0.001 using the FRESCO (First Reionization Era SpectroscopicallyComplete Observations) NIRCam F444W grism observations. Detection of Hα in HDF850.1 is noteworthy, given its high far-infrared (IR) luminosity, substantial dust obscuration, and the historical challenges in deriving its redshift.\r\nHDF850.1 shows a clear detection in the F444W imaging data, distributed between a northern and southern component, mirroring that seen in [C II] from the Plateau de Bure Interferometer. Modelling the spectral energy distribution of each component separately, we find that the northern component has a higher mass, star formation rate (SFR), and dust extinction than the southern component. The observed Hα emission appears to arise entirely from the less-obscured southern component and shows a similar \x04v∼ + 130 km s −1 velocity offset to that seen for [C II] relative to the source systemic redshift. Leveraging Hα-derived redshiftsfrom FRESCO observations, we find that HDF850.1 isforming in one of the richest environments identified to date at z > 5, with 100 z = 5.17–5.20 galaxies distributed across 13 smaller structures and a ∼(15 cMpc)3 volume. Based on the evolution of analogous structures in cosmological simulations, the z = 5.17–5.20 structures seem likely to collapse into\r\na single > 1014M cluster by z ∼ 0. Comparing galaxy properties forming within this overdensity with those outside, we find the masses, SFRs, and UV luminosities inside the overdensity to be clearly higher. The prominence of Hα line emission from HDF850.1 and other known highly obscured z > 5 galaxies illustrates the potential of NIRCam-grism programs to map both\r\nthe early build-up of IR-luminous galaxies and overdense structures." acknowledgement: "We are grateful to Roberto Neri and collaborators for providing us with spatially resolved information on both the dust-continuum and [C ii] line emission from their high spatial resolution PdBI observations. This project was made possible in part by the Leiden University Fund/Bouwens Astrophysics Fund. RJB acknowledges support from NWO grants 600.065.140.11N211 (vrij competitie) and TOP grant TOP1.16.057. The Cosmic Dawn Center (DAWN) is funded by the Danish National Research Foundation under grant no. 140. Cloud-based data processing and file storage for this work is provided by the AWS Cloud Credits for Research program. Support for this work was provided by NASA through grant JWST-GO-01895 awarded by the Space Telescope Science Institute, which is operated by the Association of Universities for Research in Astronomy, Inc., under NASA contract NAS 5–26555. RPN acknowledges funding from JWST programs GO-1933 and GO-2279. Support for this work was provided by NASA through the NASA Hubble Fellowship grant HST-HF2-51515.001-A awarded by the Space Telescope Science Institute, which is operated by the Association of Universities for Research in Astronomy, Incorporated, under NASA contract NAS5-26555. MS acknowledges support from the CIDEGENT/2021/059 grant, from project PID2019-109592GB-I00/AEI/10.13039/501100011033 from the Spanish Ministerio de Ciencia e Innovación – Agencia Estatal de Investigación. This study forms part of the Astrophysics and High Energy Physics programme and was supported by MCIN with funding from European Union NextGenerationEU (PRTR-C17.I1) and by Generalitat Valenciana under the project n. ASFAE/2022/025. RAM acknowledges support from the ERC Advanced Grant 740246 (Cosmic_Gas) and the Swiss National Science Foundation through project grant 200020_207349.\r\n\r\nThis work is based on observations made with the NASA/ESA/CSA JWST. The data were obtained from the Mikulski Archive for Space Telescopes at the Space Telescope Science Institute, which is operated by the Association of Universities for Research in Astronomy, Inc., under NASA contract NAS 5–03127 for JWST. These observations are associated with program no. 1895.\r\n\r\nThis paper made use of several publicly available software packages. We are indebted to the respective authors for their work: ipython (Pérez & Granger 2007), matplotlib (Hunter 2007), numpy (Oliphant 2006), scipy (Virtanen et al. 2020), jupyter (Kluyver et al. 2016), astropy (Astropy Collaboration 2013, 2018), grizli (v1.7.11; Brammer 2018; Brammer et al. 2022), eazy (Brammer, van Dokkum & Coppi 2008), and SExtractor (Bertin & Arnouts 1996)." article_processing_charge: Yes article_type: original arxiv: 1 author: - first_name: Thomas full_name: Herard-Demanche, Thomas last_name: Herard-Demanche - first_name: Rychard J full_name: Bouwens, Rychard J last_name: Bouwens - first_name: Pascal A full_name: Oesch, Pascal A last_name: Oesch - first_name: Rohan P full_name: Naidu, Rohan P last_name: Naidu - first_name: Roberto full_name: Decarli, Roberto last_name: Decarli - first_name: Erica J full_name: Nelson, Erica J last_name: Nelson - first_name: Gabriel full_name: Brammer, Gabriel last_name: Brammer - first_name: Andrea full_name: Weibel, Andrea last_name: Weibel - first_name: Mengyuan full_name: Xiao, Mengyuan last_name: Xiao - first_name: Mauro full_name: Stefanon, Mauro last_name: Stefanon - first_name: Fabian full_name: Walter, Fabian last_name: Walter - first_name: Jorryt J full_name: Matthee, Jorryt J id: 7439a258-f3c0-11ec-9501-9df22fe06720 last_name: Matthee orcid: 0000-0003-2871-127X - first_name: Romain A full_name: Meyer, Romain A last_name: Meyer - first_name: Stijn full_name: Wuyts, Stijn last_name: Wuyts - first_name: Naveen full_name: Reddy, Naveen last_name: Reddy - first_name: Lucie full_name: Rowland, Lucie last_name: Rowland - first_name: Ivana full_name: van Leeuwen, Ivana last_name: van Leeuwen - first_name: Pablo Arrabal full_name: Haro, Pablo Arrabal last_name: Haro - first_name: Helmut full_name: Dannerbauer, Helmut last_name: Dannerbauer - first_name: Alice E full_name: Shapley, Alice E last_name: Shapley - first_name: John full_name: Chisholm, John last_name: Chisholm - first_name: Pieter full_name: van Dokkum, Pieter last_name: van Dokkum - first_name: Ivo full_name: Labbe, Ivo last_name: Labbe - first_name: Garth full_name: Illingworth, Garth last_name: Illingworth - first_name: Daniel full_name: Schaerer, Daniel last_name: Schaerer - first_name: Irene full_name: Shivaei, Irene last_name: Shivaei citation: ama: 'Herard-Demanche T, Bouwens RJ, Oesch PA, et al. Mapping dusty galaxy growth at z > 5 with FRESCO: Detection of Hα in submm galaxy HDF850.1 and the surrounding overdense structures. Monthly Notices of the Royal Astronomical Society. 2025;537(2):788-808. doi:10.1093/mnras/staf030' apa: 'Herard-Demanche, T., Bouwens, R. J., Oesch, P. A., Naidu, R. P., Decarli, R., Nelson, E. J., … Shivaei, I. (2025). Mapping dusty galaxy growth at z > 5 with FRESCO: Detection of Hα in submm galaxy HDF850.1 and the surrounding overdense structures. Monthly Notices of the Royal Astronomical Society. Oxford University Press. https://doi.org/10.1093/mnras/staf030' chicago: 'Herard-Demanche, Thomas, Rychard J Bouwens, Pascal A Oesch, Rohan P Naidu, Roberto Decarli, Erica J Nelson, Gabriel Brammer, et al. “Mapping Dusty Galaxy Growth at z > 5 with FRESCO: Detection of Hα in Submm Galaxy HDF850.1 and the Surrounding Overdense Structures.” Monthly Notices of the Royal Astronomical Society. Oxford University Press, 2025. https://doi.org/10.1093/mnras/staf030.' ieee: 'T. Herard-Demanche et al., “Mapping dusty galaxy growth at z > 5 with FRESCO: Detection of Hα in submm galaxy HDF850.1 and the surrounding overdense structures,” Monthly Notices of the Royal Astronomical Society, vol. 537, no. 2. Oxford University Press, pp. 788–808, 2025.' ista: 'Herard-Demanche T, Bouwens RJ, Oesch PA, Naidu RP, Decarli R, Nelson EJ, Brammer G, Weibel A, Xiao M, Stefanon M, Walter F, Matthee JJ, Meyer RA, Wuyts S, Reddy N, Rowland L, van Leeuwen I, Haro PA, Dannerbauer H, Shapley AE, Chisholm J, van Dokkum P, Labbe I, Illingworth G, Schaerer D, Shivaei I. 2025. Mapping dusty galaxy growth at z > 5 with FRESCO: Detection of Hα in submm galaxy HDF850.1 and the surrounding overdense structures. Monthly Notices of the Royal Astronomical Society. 537(2), 788–808.' mla: 'Herard-Demanche, Thomas, et al. “Mapping Dusty Galaxy Growth at z > 5 with FRESCO: Detection of Hα in Submm Galaxy HDF850.1 and the Surrounding Overdense Structures.” Monthly Notices of the Royal Astronomical Society, vol. 537, no. 2, Oxford University Press, 2025, pp. 788–808, doi:10.1093/mnras/staf030.' short: T. Herard-Demanche, R.J. Bouwens, P.A. Oesch, R.P. Naidu, R. Decarli, E.J. Nelson, G. Brammer, A. Weibel, M. Xiao, M. Stefanon, F. Walter, J.J. Matthee, R.A. Meyer, S. Wuyts, N. Reddy, L. Rowland, I. van Leeuwen, P.A. Haro, H. Dannerbauer, A.E. Shapley, J. Chisholm, P. van Dokkum, I. Labbe, G. Illingworth, D. Schaerer, I. Shivaei, Monthly Notices of the Royal Astronomical Society 537 (2025) 788–808. date_created: 2026-01-28T15:25:53Z date_published: 2025-02-01T00:00:00Z date_updated: 2026-02-09T08:50:55Z day: '01' ddc: - '520' department: - _id: JoMa doi: 10.1093/mnras/staf030 external_id: arxiv: - '2309.04525' file: - access_level: open_access checksum: 4cbade43244eaa8b60bb05a90ae613da content_type: application/pdf creator: dernst date_created: 2026-02-09T08:39:19Z date_updated: 2026-02-09T08:39:19Z file_id: '21169' file_name: 2025_MonthlyNoticesRAS_HerardDemanche.pdf file_size: 2787493 relation: main_file success: 1 file_date_updated: 2026-02-09T08:39:19Z fulldoi: https://doi.org/10.1093/mnras/staf030 has_accepted_license: '1' intvolume: ' 537' issue: '2' language: - iso: eng month: '02' oa: 1 oa_version: Published Version page: 788-808 publication: Monthly Notices of the Royal Astronomical Society publication_identifier: eissn: - 1365-2966 issn: - 0035-8711 publication_status: published publisher: Oxford University Press quality_controlled: '1' status: public title: 'Mapping dusty galaxy growth at z > 5 with FRESCO: Detection of Hα in submm galaxy HDF850.1 and the surrounding overdense structures' tmp: image: /images/cc_by.png legal_code_url: https://creativecommons.org/licenses/by/4.0/legalcode name: Creative Commons Attribution 4.0 International Public License (CC-BY 4.0) short: CC BY (4.0) type: journal_article user_id: 2DF688A6-F248-11E8-B48F-1D18A9856A87 volume: 537 year: '2025' ... --- DOAJ_listed: '1' OA_place: publisher OA_type: gold PlanS_conform: '1' _id: '21122' abstract: - lang: eng text: The multimessenger combination of gravitational waves (GWs) from merging massive black hole binaries (MBHBs) and the electromagnetic (EM) counterpart from the surrounding circumbinary disc (CBD) will open avenues to new scientific pursuits. In order to realize this science, we need to correctly localize the host galaxy of the merging MBHB. Multiwavelength, time-dependent EM signatures can greatly facilitate the identification of the unique EM counterpart among many sources in LISA’s localization volume. To this end, we studied merging unequal-mass MBHBs embedded in a CBD using high-resolution 2D simulations, with a $\Gamma$-law equation of state, incorporating viscous heating, shock heating, and radiative cooling. We simulate each binary starting from before it decouples from the CBD until just after the merger. We compute EM signatures and identify distinct features before, during, and after the merger. We corroborate previous findings of a several orders of magnitude drop in the thermal X-ray luminosity near the time of merger, but with delayed timing compared to an equal-mass system. The source remains X-ray dark for hours post-merger. Our main results are a potential new signature of a sharp spike in the thermal X-ray emission just before the tell-tale steep drop occurs. This feature may further help to identify EM counterparts of LISA’s unequal MBHBs before merger without the need for extensive pre-merger monitoring. Additionally, we find a role-reversal in which the primary out-accretes the secondary during late inspiral, which may diminish signatures originating from Doppler modulation. acknowledgement: 'We acknowledge support from the Nationale Wetenschapsagenda Roadmap grant ‘Gravitational Waves Laser Interferometer Space Antenna/Einstein Telescope: Shivers from the Deep Universe: A National Infrastructure for Gravitational Wave Research’ (LMK), National Science Foundation grant AST-2006176 (ZH), and National Aeronautics and Space Administration Astrophysics Theory Program grant 80NSSC22K0822 (AM and ZH). JD was supported by National Aeronautics and Space Administration through the National Aeronautics and Space Administration Hubble Fellowship grant HST-HF2-51552.001A, awarded by the Space Telescope Science Institute, which is operated by the Association of Universities for Research in Astronomy, Incorporated, under National Aeronautics and Space Administration contract NAS5-26555. This research was supported in part by the National Science Foundation under grant no. NSF PHY-1748958. This research has made use of National Aeronautics and Space Administration’s Astrophysics Data System. Resources supporting this work were provided by the National Aeronautics and Space Administration High-End Computing (HEC) Program through the National Aeronautics and Space Administration Advanced Supercomputing (NAS) Division at Ames Research Center. Software: python (Oliphant 2007; Millman & Aivazis 2011), scipy (Jones et al. 2001), numpy (van der Walt, Colbert & Varoquaux 2011), and matplotlib (Hunter 2007).' article_processing_charge: Yes article_type: original arxiv: 1 author: - first_name: Luke Major full_name: Krauth, Luke Major last_name: Krauth - first_name: Jordy full_name: Davelaar, Jordy last_name: Davelaar - first_name: Zoltán full_name: Haiman, Zoltán id: 7c006e8c-cc0d-11ee-8322-cb904ef76f36 last_name: Haiman orcid: 0000-0003-3633-5403 - first_name: John Ryan full_name: Westernacher-Schneider, John Ryan last_name: Westernacher-Schneider - first_name: Jonathan full_name: Zrake, Jonathan last_name: Zrake - first_name: Andrew full_name: MacFadyen, Andrew last_name: MacFadyen citation: ama: Krauth LM, Davelaar J, Haiman Z, Westernacher-Schneider JR, Zrake J, MacFadyen A. Thermal X-ray signatures in late-stage unequal-mass massive black hole binary mergers. Monthly Notices of the Royal Astronomical Society. 2025;543(3):2670-2685. doi:10.1093/mnras/staf1583 apa: Krauth, L. M., Davelaar, J., Haiman, Z., Westernacher-Schneider, J. R., Zrake, J., & MacFadyen, A. (2025). Thermal X-ray signatures in late-stage unequal-mass massive black hole binary mergers. Monthly Notices of the Royal Astronomical Society. Oxford University Press. https://doi.org/10.1093/mnras/staf1583 chicago: Krauth, Luke Major, Jordy Davelaar, Zoltán Haiman, John Ryan Westernacher-Schneider, Jonathan Zrake, and Andrew MacFadyen. “Thermal X-Ray Signatures in Late-Stage Unequal-Mass Massive Black Hole Binary Mergers.” Monthly Notices of the Royal Astronomical Society. Oxford University Press, 2025. https://doi.org/10.1093/mnras/staf1583. ieee: L. M. Krauth, J. Davelaar, Z. Haiman, J. R. Westernacher-Schneider, J. Zrake, and A. MacFadyen, “Thermal X-ray signatures in late-stage unequal-mass massive black hole binary mergers,” Monthly Notices of the Royal Astronomical Society, vol. 543, no. 3. Oxford University Press, pp. 2670–2685, 2025. ista: Krauth LM, Davelaar J, Haiman Z, Westernacher-Schneider JR, Zrake J, MacFadyen A. 2025. Thermal X-ray signatures in late-stage unequal-mass massive black hole binary mergers. Monthly Notices of the Royal Astronomical Society. 543(3), 2670–2685. mla: Krauth, Luke Major, et al. “Thermal X-Ray Signatures in Late-Stage Unequal-Mass Massive Black Hole Binary Mergers.” Monthly Notices of the Royal Astronomical Society, vol. 543, no. 3, Oxford University Press, 2025, pp. 2670–85, doi:10.1093/mnras/staf1583. short: L.M. Krauth, J. Davelaar, Z. Haiman, J.R. Westernacher-Schneider, J. Zrake, A. MacFadyen, Monthly Notices of the Royal Astronomical Society 543 (2025) 2670–2685. date_created: 2026-01-31T09:28:28Z date_published: 2025-11-01T00:00:00Z date_updated: 2026-02-10T07:10:21Z day: '01' ddc: - '520' department: - _id: ZoHa doi: 10.1093/mnras/staf1583 external_id: arxiv: - '2503.01494' file: - access_level: open_access checksum: f9b4c6a606df9493f6eb6af5ebcca6db content_type: application/pdf creator: dernst date_created: 2026-02-10T07:07:17Z date_updated: 2026-02-10T07:07:17Z file_id: '21203' file_name: 2025_MonthlyNoticesRAS_Krauth.pdf file_size: 3689696 relation: main_file success: 1 file_date_updated: 2026-02-10T07:07:17Z fulldoi: https://doi.org/10.1093/mnras/staf1583 has_accepted_license: '1' intvolume: ' 543' issue: '3' language: - iso: eng month: '11' oa: 1 oa_version: Published Version page: 2670-2685 publication: Monthly Notices of the Royal Astronomical Society publication_identifier: eissn: - 1365-2966 issn: - 0035-8711 publication_status: published publisher: Oxford University Press quality_controlled: '1' status: public title: Thermal X-ray signatures in late-stage unequal-mass massive black hole binary mergers tmp: image: /images/cc_by.png legal_code_url: https://creativecommons.org/licenses/by/4.0/legalcode name: Creative Commons Attribution 4.0 International Public License (CC-BY 4.0) short: CC BY (4.0) type: journal_article user_id: 2DF688A6-F248-11E8-B48F-1D18A9856A87 volume: 543 year: '2025' ... --- DOAJ_listed: '1' OA_place: publisher OA_type: gold PlanS_conform: '1' _id: '21127' abstract: - lang: eng text: "The early growth of black holes (BHs) in atomic-cooling haloes is likely influenced by feedback on the surrounding gas. While the effects of radiative feedback are well-documented, mechanical feedback, particularly from active galactic nucleus (AGN) jets, has been comparatively less explored. Building on our previous work that examined the growth of a 100 M BH in a constant density environment regulated by AGN jets, we expand the initial BH mass range from 1 to 104 M and adopt a more realistic density profile for atomic-cooling haloes. We reaffirm the validity of our analytic models for jet cocoon propagation and feedback regulation. We identify several critical radii – namely, the terminal radius of jet cocoon propagation, the isotropization radius of the jet cocoon, and the core radius of the atomic-cooling halo – that are crucial in determining BH growth given specific gas properties and jet feedback parameters. In a significant portion of the parameter space, our findings show that jet feedback substantially disrupts the halo’s core during the initial feedback episode, preventing BH growth beyond 104 M.\r\nConversely, conditions characterized by low jet velocities and high gas densities enable sustained BH growth over extended periods. We provide a prediction for the BH mass growth as a function of time and feedback parameters. We found that, to form a supermassive BH (> 106 M) within 1 Gyr entirely by accreting gas from an atomic-cooling halo, the jet energy feedback\r\nefficiency must be 10−4M˙ BHc2 even if the seed BH mass is 104 M." article_processing_charge: Yes article_type: original arxiv: 1 author: - first_name: Kung-Yi full_name: Su, Kung-Yi last_name: Su - first_name: Greg L full_name: Bryan, Greg L last_name: Bryan - first_name: Zoltán full_name: Haiman, Zoltán id: 7c006e8c-cc0d-11ee-8322-cb904ef76f36 last_name: Haiman orcid: 0000-0003-3633-5403 citation: ama: 'Su K-Y, Bryan GL, Haiman Z. Self-regulation of high-redshift black hole accretion via jets: Challenges for SMBH formation. Monthly Notices of the Royal Astronomical Society. 2025;538(1):11-30. doi:10.1093/mnras/staf228' apa: 'Su, K.-Y., Bryan, G. L., & Haiman, Z. (2025). Self-regulation of high-redshift black hole accretion via jets: Challenges for SMBH formation. Monthly Notices of the Royal Astronomical Society. Oxford University Press. https://doi.org/10.1093/mnras/staf228' chicago: 'Su, Kung-Yi, Greg L Bryan, and Zoltán Haiman. “Self-Regulation of High-Redshift Black Hole Accretion via Jets: Challenges for SMBH Formation.” Monthly Notices of the Royal Astronomical Society. Oxford University Press, 2025. https://doi.org/10.1093/mnras/staf228.' ieee: 'K.-Y. Su, G. L. Bryan, and Z. Haiman, “Self-regulation of high-redshift black hole accretion via jets: Challenges for SMBH formation,” Monthly Notices of the Royal Astronomical Society, vol. 538, no. 1. Oxford University Press, pp. 11–30, 2025.' ista: 'Su K-Y, Bryan GL, Haiman Z. 2025. Self-regulation of high-redshift black hole accretion via jets: Challenges for SMBH formation. Monthly Notices of the Royal Astronomical Society. 538(1), 11–30.' mla: 'Su, Kung-Yi, et al. “Self-Regulation of High-Redshift Black Hole Accretion via Jets: Challenges for SMBH Formation.” Monthly Notices of the Royal Astronomical Society, vol. 538, no. 1, Oxford University Press, 2025, pp. 11–30, doi:10.1093/mnras/staf228.' short: K.-Y. Su, G.L. Bryan, Z. Haiman, Monthly Notices of the Royal Astronomical Society 538 (2025) 11–30. date_created: 2026-01-31T09:29:59Z date_published: 2025-03-01T00:00:00Z date_updated: 2026-02-10T08:36:54Z day: '01' ddc: - '520' doi: 10.1093/mnras/staf228 extern: '1' external_id: arxiv: - '2409.12250' fulldoi: https://doi.org/10.1093/mnras/staf228 has_accepted_license: '1' intvolume: ' 538' issue: '1' language: - iso: eng main_file_link: - open_access: '1' url: https://doi.org/10.1093/mnras/staf228 month: '03' oa: 1 oa_version: Published Version page: 11-30 publication: Monthly Notices of the Royal Astronomical Society publication_identifier: eissn: - 1365-2966 issn: - 0035-8711 publication_status: published publisher: Oxford University Press quality_controlled: '1' status: public title: 'Self-regulation of high-redshift black hole accretion via jets: Challenges for SMBH formation' tmp: image: /images/cc_by.png legal_code_url: https://creativecommons.org/licenses/by/4.0/legalcode name: Creative Commons Attribution 4.0 International Public License (CC-BY 4.0) short: CC BY (4.0) type: journal_article user_id: 2DF688A6-F248-11E8-B48F-1D18A9856A87 volume: 538 year: '2025' ... --- DOAJ_listed: '1' OA_place: publisher OA_type: gold PlanS_conform: '1' _id: '21128' abstract: - lang: eng text: The brightest steady sources of radiation in the universe, active galactic nuclei (AGNs), are powered by gas accretion on to a central supermassive black hole (SMBH). The large sizes and accretion rates implicated in AGN accretion discs are expected to lead to gravitational instability and fragmentation, effectively cutting off mass inflow to the SMBH. Radiative feedback from disc-embedded stars has been invoked to yield marginally stable, steady-state solutions in the outer discs. Here, we examine the consequences of this star formation with a semi-analytical model in which stellar-mass black hole (sBH) remnants in the disc provide an additional source of stabilizing radiative feedback. Assuming star formation seeds the embedded sBH population, we model the time-evolving feedback from both stars and the growing population of accreting sBHs. We find that in the outer disc, the luminosity of the sBHs quickly dominates that of their parent stars. However, because sBHs consume less gas than stars to stabilize the disc, the presence of the sBHs enhances the mass flux to the inner disc. As a result, star formation persists over the lifetime of the AGN, damped in the outer disc, but amplified in a narrow ring in the inner disc. Heating from the embedded sBHs significantly modifies the disc’s temperature profile and hardens its spectral energy distribution, and direct emission from the sBHs adds a new hard X-ray component. article_processing_charge: Yes article_type: original arxiv: 1 author: - first_name: Marguerite full_name: Epstein-Martin, Marguerite last_name: Epstein-Martin - first_name: Hiromichi full_name: Tagawa, Hiromichi last_name: Tagawa - first_name: Zoltán full_name: Haiman, Zoltán id: 7c006e8c-cc0d-11ee-8322-cb904ef76f36 last_name: Haiman orcid: 0000-0003-3633-5403 - first_name: Rosalba full_name: Perna, Rosalba last_name: Perna citation: ama: Epstein-Martin M, Tagawa H, Haiman Z, Perna R. Time-dependent models of AGN discs with radiation from embedded stellar-mass black holes. Monthly Notices of the Royal Astronomical Society. 2025;537(4):3396-3420. doi:10.1093/mnras/staf237 apa: Epstein-Martin, M., Tagawa, H., Haiman, Z., & Perna, R. (2025). Time-dependent models of AGN discs with radiation from embedded stellar-mass black holes. Monthly Notices of the Royal Astronomical Society. Oxford University Press. https://doi.org/10.1093/mnras/staf237 chicago: Epstein-Martin, Marguerite, Hiromichi Tagawa, Zoltán Haiman, and Rosalba Perna. “Time-Dependent Models of AGN Discs with Radiation from Embedded Stellar-Mass Black Holes.” Monthly Notices of the Royal Astronomical Society. Oxford University Press, 2025. https://doi.org/10.1093/mnras/staf237. ieee: M. Epstein-Martin, H. Tagawa, Z. Haiman, and R. Perna, “Time-dependent models of AGN discs with radiation from embedded stellar-mass black holes,” Monthly Notices of the Royal Astronomical Society, vol. 537, no. 4. Oxford University Press, pp. 3396–3420, 2025. ista: Epstein-Martin M, Tagawa H, Haiman Z, Perna R. 2025. Time-dependent models of AGN discs with radiation from embedded stellar-mass black holes. Monthly Notices of the Royal Astronomical Society. 537(4), 3396–3420. mla: Epstein-Martin, Marguerite, et al. “Time-Dependent Models of AGN Discs with Radiation from Embedded Stellar-Mass Black Holes.” Monthly Notices of the Royal Astronomical Society, vol. 537, no. 4, Oxford University Press, 2025, pp. 3396–420, doi:10.1093/mnras/staf237. short: M. Epstein-Martin, H. Tagawa, Z. Haiman, R. Perna, Monthly Notices of the Royal Astronomical Society 537 (2025) 3396–3420. date_created: 2026-01-31T09:30:19Z date_published: 2025-03-01T00:00:00Z date_updated: 2026-02-10T09:00:44Z day: '01' ddc: - '520' doi: 10.1093/mnras/staf237 extern: '1' external_id: arxiv: - '2405.09380' fulldoi: https://doi.org/10.1093/mnras/staf237 has_accepted_license: '1' intvolume: ' 537' issue: '4' language: - iso: eng main_file_link: - open_access: '1' url: https://doi.org/10.1093/mnras/staf237 month: '03' oa: 1 oa_version: Published Version page: 3396-3420 publication: Monthly Notices of the Royal Astronomical Society publication_identifier: eissn: - 1365-2966 issn: - 0035-8711 publication_status: published publisher: Oxford University Press quality_controlled: '1' status: public title: Time-dependent models of AGN discs with radiation from embedded stellar-mass black holes tmp: image: /images/cc_by.png legal_code_url: https://creativecommons.org/licenses/by/4.0/legalcode name: Creative Commons Attribution 4.0 International Public License (CC-BY 4.0) short: CC BY (4.0) type: journal_article user_id: 2DF688A6-F248-11E8-B48F-1D18A9856A87 volume: 537 year: '2025' ... --- DOAJ_listed: '1' OA_place: publisher OA_type: gold PlanS_conform: '1' _id: '18984' abstract: - lang: eng text: Although planets have been found orbiting binary systems, whether they can survive binary interactions is debated. While the tightest-orbit binaries should host the most dynamically stable and long-lived circumbinary planetary systems, they are also the systems that are expected to experience mass transfer, common envelope evolution, or stellar mergers. In this study, we explore the effect of stable non-conservative mass transfer on the dynamical evolution of circumbinary planets. We present a new script that seamlessly integrates binary evolution data from the 1D binary stellar evolution code MESA into the N-body simulation code REBOUND. This integration framework enables a comprehensive examination of the dynamical evolution of circumbinary planets orbiting mass-transferring binaries, while simultaneously accounting for the detailed stellar structure evolution. In addition, we introduce a recalibration method to mitigate numerical errors from updates of binary properties during the system's dynamical evolution. We construct a reference binary model in which a 2.21M⊙ star loses its hydrogen-rich envelope through non-conservative mass transfer to the 1.76M⊙ companion star, creating a 0.38M⊙ subdwarf. We find the tightest stable orbital separation for circumbinary planets to be ≃2.5 times the binary separation after mass transfer. Accounting for tides by using the interior stellar structure, we find that tidal effects become apparent after the rapid mass transfer phase and start to fade away during the latter stage of the slow mass transfer phase. Our research provides a new framework for exploring circumbinary planet dynamics in interacting binary systems. acknowledgement: We thank the participants of the 2023 Kavli Summer Program in Astrophysics, hosted by the Max Planck Institute for Astrophysics and funded by the Kavli Foundation. In particular, Holly Preece, Selma de Mink, and Stephen Justham for their feedback and comments on our work. ZX acknowledges support from the China Scholarship Council (CSC). ST acknowledges the funding from the European Union’s Horizon 2020 research and innovation programme under the Marie Skłodowska-Curie grant agreement No. 101034413. AAT acknowledges support from the Horizon Europe research and innovation programmes under the Marie Skłodowska-Curie grant agreement no. 101103134. article_processing_charge: Yes article_type: original arxiv: 1 author: - first_name: Zepei full_name: Xing, Zepei last_name: Xing - first_name: Santiago full_name: Torres Rodriguez, Santiago id: a8df4360-4328-11ee-8f1a-e502d0c83fc2 last_name: Torres Rodriguez orcid: 0000-0002-3150-8988 - first_name: Ylva Louise Linsdotter full_name: Götberg, Ylva Louise Linsdotter id: d0648d0c-0f64-11ee-a2e0-dd0faa2e4f7d last_name: Götberg orcid: 0000-0002-6960-6911 - first_name: Alessandro A. full_name: Trani, Alessandro A. last_name: Trani - first_name: Valeriya full_name: Korol, Valeriya last_name: Korol - first_name: Jorge full_name: Cuadra, Jorge last_name: Cuadra citation: ama: 'Xing Z, Torres Rodriguez S, Götberg YLL, Trani AA, Korol V, Cuadra J. Combining REBOUND and MESA: Dynamical evolution of planets orbiting interacting binaries. Monthly Notices of the Royal Astronomical Society. 2025;537(1):285-292. doi:10.1093/mnras/stae2820' apa: 'Xing, Z., Torres Rodriguez, S., Götberg, Y. L. L., Trani, A. A., Korol, V., & Cuadra, J. (2025). Combining REBOUND and MESA: Dynamical evolution of planets orbiting interacting binaries. Monthly Notices of the Royal Astronomical Society. Oxford University Press. https://doi.org/10.1093/mnras/stae2820' chicago: 'Xing, Zepei, Santiago Torres Rodriguez, Ylva Louise Linsdotter Götberg, Alessandro A. Trani, Valeriya Korol, and Jorge Cuadra. “Combining REBOUND and MESA: Dynamical Evolution of Planets Orbiting Interacting Binaries.” Monthly Notices of the Royal Astronomical Society. Oxford University Press, 2025. https://doi.org/10.1093/mnras/stae2820.' ieee: 'Z. Xing, S. Torres Rodriguez, Y. L. L. Götberg, A. A. Trani, V. Korol, and J. Cuadra, “Combining REBOUND and MESA: Dynamical evolution of planets orbiting interacting binaries,” Monthly Notices of the Royal Astronomical Society, vol. 537, no. 1. Oxford University Press, pp. 285–292, 2025.' ista: 'Xing Z, Torres Rodriguez S, Götberg YLL, Trani AA, Korol V, Cuadra J. 2025. Combining REBOUND and MESA: Dynamical evolution of planets orbiting interacting binaries. Monthly Notices of the Royal Astronomical Society. 537(1), 285–292.' mla: 'Xing, Zepei, et al. “Combining REBOUND and MESA: Dynamical Evolution of Planets Orbiting Interacting Binaries.” Monthly Notices of the Royal Astronomical Society, vol. 537, no. 1, Oxford University Press, 2025, pp. 285–92, doi:10.1093/mnras/stae2820.' short: Z. Xing, S. Torres Rodriguez, Y.L.L. Götberg, A.A. Trani, V. Korol, J. Cuadra, Monthly Notices of the Royal Astronomical Society 537 (2025) 285–292. date_created: 2025-02-02T23:01:53Z date_published: 2025-02-01T00:00:00Z date_updated: 2025-12-30T07:25:37Z day: '01' ddc: - '520' department: - _id: YlGo - _id: LiBu doi: 10.1093/mnras/stae2820 ec_funded: 1 external_id: arxiv: - '2410.19695' isi: - '001400731500001' file: - access_level: open_access checksum: 49fb4fe69f487d36169ccea60acbeccc content_type: application/pdf creator: dernst date_created: 2025-12-30T07:24:34Z date_updated: 2025-12-30T07:24:34Z file_id: '20881' file_name: 2025_MonthlyNoticesRAS_Xing.pdf file_size: 2974244 relation: main_file success: 1 file_date_updated: 2025-12-30T07:24:34Z fulldoi: https://doi.org/10.1093/mnras/stae2820 has_accepted_license: '1' intvolume: ' 537' isi: 1 issue: '1' language: - iso: eng month: '02' oa: 1 oa_version: Published Version page: 285-292 project: - _id: fc2ed2f7-9c52-11eb-aca3-c01059dda49c call_identifier: H2020 grant_number: '101034413' name: 'IST-BRIDGE: International postdoctoral program' publication: Monthly Notices of the Royal Astronomical Society publication_identifier: eissn: - 1365-2966 issn: - 0035-8711 publication_status: published publisher: Oxford University Press quality_controlled: '1' scopus_import: '1' status: public title: 'Combining REBOUND and MESA: Dynamical evolution of planets orbiting interacting binaries' tmp: image: /images/cc_by.png legal_code_url: https://creativecommons.org/licenses/by/4.0/legalcode name: Creative Commons Attribution 4.0 International Public License (CC-BY 4.0) short: CC BY (4.0) type: journal_article user_id: 2DF688A6-F248-11E8-B48F-1D18A9856A87 volume: 537 year: '2025' ... --- DOAJ_listed: '1' OA_place: publisher OA_type: gold _id: '19066' abstract: - lang: eng text: "We present a sample of 1956 individual stellar clumps at redshift 0.7 < z < 10, detected with JWST/NIRCam in 476 galaxies lensed by the galaxy cluster Abell2744. The lensed clumps present magnifications ranging between μ = 1.8 and μ = 300. We perform simultaneous size-photometry estimates in 20 JWST/NIRCam median and broad-band filters from 0.7 to 5 μm.\r\nSpectral energy distribution (SED) fitting analyses enable us to recover the physical properties of the clumps. The majority of the clumps are spatially resolved and have effective radii in the range Reff = 10–700 pc. We restrict this first study to the 1751 post-reionization era clumps with redshift < 5.5. We find a significant evolution of the average clump ages, star formation rates (SFRs), SFR surface densities, and metallicity with increasing redshift, while median stellar mass and stellar mass surface densities are similar in the probed redshift range. We observe a strong correlation between the clump properties and the properties of their host galaxies, with more massive galaxies hosting more massive and older clumps. We find that clumps closer to their host galactic centre are on average more massive, while their ages do not show clear sign of migration. We find that clumps at cosmic noon sample the upper-mass end of the mass function to higher masses than at z > 3, reflecting the rapid increase towards the peak of the cosmic star formation history. We conclude that the results achieved over the studied redshift range are in agreement with expectation of in situ clump formation scenario from large-scale disc fragmentation. " acknowledgement: 'The authors thank the International Space Science Institute for sponsoring the ISSI team: ‘Star Formation within rapidly evolving galaxies’ where many ideas discussed in this article have been brainstormed. AA and AC acknowledge support by the Swedish research council Vetenskapsrådet (2021-05559). MM acknowledges the financial support through grant PRIN-MIUR 2020SKSTHZ. JM and IK acknowledge support by the European Union (ERC, AGENTS, 101076224). Views and opinions expressed are however those of the author(s) only and do not necessarily reflect those of the European Union or the European Research Council. Neither the European Union nor the granting authority can be held responsible for them. RPN acknowledges funding from JWST programme GO-3516. Support for this work was provided by NASA through the NASA Hubble Fellowship grant HST-HF2-51515.001-A awarded by the Space Telescope Science Institute, which is operated by the Association of Universities for Research in Astronomy, Incorporated, under NASA contract NAS5-26555.' article_processing_charge: No article_type: original arxiv: 1 author: - first_name: Adélaïde full_name: Claeyssens, Adélaïde last_name: Claeyssens - first_name: Angela full_name: Adamo, Angela last_name: Adamo - first_name: Matteo full_name: Messa, Matteo last_name: Messa - first_name: Miroslava full_name: Dessauges-Zavadsky, Miroslava last_name: Dessauges-Zavadsky - first_name: Johan full_name: Richard, Johan last_name: Richard - first_name: Ivan full_name: Kramarenko, Ivan id: 9a9394cb-3200-11ee-973b-f5ba2a8b16e4 last_name: Kramarenko orcid: 0000-0001-5346-6048 - first_name: Jorryt J full_name: Matthee, Jorryt J id: 7439a258-f3c0-11ec-9501-9df22fe06720 last_name: Matthee orcid: 0000-0003-2871-127X - first_name: Rohan P. full_name: Naidu, Rohan P. last_name: Naidu citation: ama: Claeyssens A, Adamo A, Messa M, et al. Tracing star formation across cosmic time at tens of parsec-scales in the lensing cluster field Abell 2744. Monthly Notices of the Royal Astronomical Society. 2025;537(3):2535-2558. doi:10.1093/mnras/staf058 apa: Claeyssens, A., Adamo, A., Messa, M., Dessauges-Zavadsky, M., Richard, J., Kramarenko, I., … Naidu, R. P. (2025). Tracing star formation across cosmic time at tens of parsec-scales in the lensing cluster field Abell 2744. Monthly Notices of the Royal Astronomical Society. Oxford University Press. https://doi.org/10.1093/mnras/staf058 chicago: Claeyssens, Adélaïde, Angela Adamo, Matteo Messa, Miroslava Dessauges-Zavadsky, Johan Richard, Ivan Kramarenko, Jorryt J Matthee, and Rohan P. Naidu. “Tracing Star Formation across Cosmic Time at Tens of Parsec-Scales in the Lensing Cluster Field Abell 2744.” Monthly Notices of the Royal Astronomical Society. Oxford University Press, 2025. https://doi.org/10.1093/mnras/staf058. ieee: A. Claeyssens et al., “Tracing star formation across cosmic time at tens of parsec-scales in the lensing cluster field Abell 2744,” Monthly Notices of the Royal Astronomical Society, vol. 537, no. 3. Oxford University Press, pp. 2535–2558, 2025. ista: Claeyssens A, Adamo A, Messa M, Dessauges-Zavadsky M, Richard J, Kramarenko I, Matthee JJ, Naidu RP. 2025. Tracing star formation across cosmic time at tens of parsec-scales in the lensing cluster field Abell 2744. Monthly Notices of the Royal Astronomical Society. 537(3), 2535–2558. mla: Claeyssens, Adélaïde, et al. “Tracing Star Formation across Cosmic Time at Tens of Parsec-Scales in the Lensing Cluster Field Abell 2744.” Monthly Notices of the Royal Astronomical Society, vol. 537, no. 3, Oxford University Press, 2025, pp. 2535–58, doi:10.1093/mnras/staf058. short: A. Claeyssens, A. Adamo, M. Messa, M. Dessauges-Zavadsky, J. Richard, I. Kramarenko, J.J. Matthee, R.P. Naidu, Monthly Notices of the Royal Astronomical Society 537 (2025) 2535–2558. date_created: 2025-02-23T23:01:55Z date_published: 2025-03-01T00:00:00Z date_updated: 2026-02-16T11:51:48Z day: '01' ddc: - '520' department: - _id: JoMa - _id: GradSch doi: 10.1093/mnras/staf058 external_id: arxiv: - '2410.10974' isi: - '001420026000001' file: - access_level: open_access checksum: 431aef05755e6b5472f5e9b4c326cf84 content_type: application/pdf creator: dernst date_created: 2025-02-25T06:38:43Z date_updated: 2025-02-25T06:38:43Z file_id: '19084' file_name: 2025_MonthlyNoticesRAS_Claeyssens.pdf file_size: 35099276 relation: main_file success: 1 file_date_updated: 2025-02-25T06:38:43Z fulldoi: https://doi.org/10.1093/mnras/staf058 has_accepted_license: '1' intvolume: ' 537' isi: 1 issue: '3' language: - iso: eng month: '03' oa: 1 oa_version: Published Version page: 2535-2558 project: - _id: bd9b2118-d553-11ed-ba76-db24564edfea grant_number: '101076224' name: Young galaxies as tracers and agents of cosmic reionization publication: Monthly Notices of the Royal Astronomical Society publication_identifier: eissn: - 1365-2966 issn: - 0035-8711 publication_status: published publisher: Oxford University Press quality_controlled: '1' scopus_import: '1' status: public title: Tracing star formation across cosmic time at tens of parsec-scales in the lensing cluster field Abell 2744 tmp: image: /images/cc_by.png legal_code_url: https://creativecommons.org/licenses/by/4.0/legalcode name: Creative Commons Attribution 4.0 International Public License (CC-BY 4.0) short: CC BY (4.0) type: journal_article user_id: 2DF688A6-F248-11E8-B48F-1D18A9856A87 volume: 537 year: '2025' ... --- OA_place: publisher OA_type: gold _id: '19840' abstract: - lang: eng text: "We report the discovery of two new magnetic cataclysmic variables with brown dwarf companions and long orbital periods (P_{\\rm orb}=95\\pm1 and 104\\pm2 min). This discovery increases the sample of candidate magnetic period bouncers with confirmed sub-stellar donors from four to six. We also find their X-ray luminosity from archival XMM–Newton observations to be in the range L_{\\rm X}\\approx10^{28}-10^{29} \\mathrm{erg\\,s^{-1}} in the 0.25–10 keV band. This low luminosity is comparable with the other candidates, and at least an order of magnitude lower than the X-ray luminosities typically measured in cataclysmic variables. The X-ray fluxes imply mass transfer rates that are much lower than predicted by evolutionary models, even if some of the discrepancy is due to the accretion energy being emitted in other bands, such as via cyclotron emission at infrared wavelengths. Although it is possible that some or all of these systems formed directly as binaries containing a brown dwarf, it is likely that the donor used to be a low-mass star and that the systems followed the evolutionary track for cataclysmic variables, evolving past the period bounce. The donor in long period systems is expected to be a low-mass, cold brown dwarf. This hypothesis is supported by near-infrared photometric observations that constrain the donors in the two systems to be brown dwarfs cooler than \r\n1100 K (spectral types T5 or later), most likely losing mass via Roche Lobe overflow or winds. The serendipitous discovery of two magnetic period bouncers in the small footprint of the XMM–Newton catalogue implies a large space density of these type of systems, possibly compatible with the prediction of 40–70 per cent of magnetic cataclysmic variables to be period bouncers." acknowledgement: "We thank Matthias Schreiber for his insightful comments. Support for this work was provided by NASA through the NASA Hubble Fellowship grant HST-HF2-51527.001-A awarded by the Space Telescope Science Institute, which is operated by the Association of Universities for Research in Astronomy, Inc., for NASA, under contract NAS5-26555. Support for this work was provided by NASA through Chandra Award Number GO4-25014X issued by the Chandra X-ray Center, which is operated by the Smithsonian Astrophysical Observatory for and on behalf of NASA under contract NAS8-03060. IC was also supported by NASA through grants from the Space Telescope Science Institute, under NASA contracts NASA.22K1813, NAS5-26555, and NAS5-03127. This project has received funding from the European Research Council (ERC) under the European Union’s Horizon 2020 research and innovation programme (grant agreement no. 101020057). This research was supported in part by grant NSF PHY-1748958 to the Kavli Institute for Theoretical Physics (KITP). PJW acknowledges support from the UK Science and Technology Facilities Council (STFC) through consolidated grants ST/T000406/1 and ST/X001121/1. RA was supported by NASA through the NASA Hubble Fellowship grant #HST-HF2-51499.001-A awarded by the Space Telescope Science Institute, which is operated by the Association of Universities for Research in Astronomy, Incorporated, under NASA contract NAS5-26555.\r\n\r\nThis research has made use of data obtained from the 4XMM XMM–Newton Serendipitous Source Catalogue compiled by the 10 institutes of the XMM–Newton Survey Science Centre selected by ESA. This work has made use of data from the European Space Agency (ESA) mission Gaia (https://www.cosmos.esa.int/gaia), processed by the Gaia Data Processing and Analysis Consortium (DPAC, https://www.cosmos.esa.int/web/gaia/dpac/consortium). Funding for the DPAC has been provided by national institutions, in particular the institutions participating in the Gaia Multilateral Agreement. The Pan-STARRS1 Surveys (PS1) and the PS1 public science archive have been made possible through contributions by the Institute for Astronomy, the University of Hawaii, the Pan-STARRS Project Office, the Max-Planck Society and its participating institutes, the Max Planck Institute for Astronomy, Heidelberg and the Max Planck Institute for Extraterrestrial Physics, Garching, The Johns Hopkins University, Durham University, the University of Edinburgh, the Queen’s University Belfast, the Harvard–Smithsonian Center for Astrophysics, the Las Cumbres Observatory Global Telescope Network Incorporated, the National Central University of Taiwan, the Space Telescope Science Institute, the National Aeronautics and Space Administration under grant no. NNX08AR22G issued through the Planetary Science Division of the NASA Science Mission Directorate, the National Science Foundation grant no. AST–1238877, the University of Maryland, Eotvos Lorand University (ELTE), the Los Alamos National Laboratory, and the Gordon and Betty Moore Foundation. This work is based in part on data obtained as part of the UKIDSS. This research made use of hips2fits,4 a service provided by CDS, and of astropy (Astropy Collaboration 2013)." article_processing_charge: Yes article_type: original arxiv: 1 author: - first_name: Tim full_name: Cunningham, Tim last_name: Cunningham - first_name: Ilaria full_name: Caiazzo, Ilaria id: 8ae5b6e7-2a03-11ee-914d-b58ed7a3b47d last_name: Caiazzo orcid: 0000-0002-4770-5388 - first_name: Gracjan full_name: Sienkiewicz, Gracjan last_name: Sienkiewicz - first_name: Peter J. full_name: Wheatley, Peter J. last_name: Wheatley - first_name: Boris T. full_name: Gänsicke, Boris T. last_name: Gänsicke - first_name: Kareem full_name: El-Badry, Kareem last_name: El-Badry - first_name: Riccardo full_name: Arcodia, Riccardo last_name: Arcodia - first_name: David full_name: Charbonneau, David last_name: Charbonneau - first_name: Liam full_name: Connor, Liam last_name: Connor - first_name: Kishalay full_name: De, Kishalay last_name: De - first_name: Pasi full_name: Hakala, Pasi last_name: Hakala - first_name: Scott J. full_name: Kenyon, Scott J. last_name: Kenyon - first_name: Sumit Kumar full_name: Maheshwari, Sumit Kumar last_name: Maheshwari - first_name: Antonio C. full_name: Rodriguez, Antonio C. last_name: Rodriguez - first_name: Jan full_name: Van Roestel, Jan last_name: Van Roestel - first_name: Pier Emmanuel full_name: Tremblay, Pier Emmanuel last_name: Tremblay citation: ama: Cunningham T, Caiazzo I, Sienkiewicz G, et al. Discovery of two new polars evolved past the period bounce. Monthly Notices of the Royal Astronomical Society. 2025;540(1):633-649. doi:10.1093/mnras/staf561 apa: Cunningham, T., Caiazzo, I., Sienkiewicz, G., Wheatley, P. J., Gänsicke, B. T., El-Badry, K., … Tremblay, P. E. (2025). Discovery of two new polars evolved past the period bounce. Monthly Notices of the Royal Astronomical Society. Oxford University Press. https://doi.org/10.1093/mnras/staf561 chicago: Cunningham, Tim, Ilaria Caiazzo, Gracjan Sienkiewicz, Peter J. Wheatley, Boris T. Gänsicke, Kareem El-Badry, Riccardo Arcodia, et al. “Discovery of Two New Polars Evolved Past the Period Bounce.” Monthly Notices of the Royal Astronomical Society. Oxford University Press, 2025. https://doi.org/10.1093/mnras/staf561. ieee: T. Cunningham et al., “Discovery of two new polars evolved past the period bounce,” Monthly Notices of the Royal Astronomical Society, vol. 540, no. 1. Oxford University Press, pp. 633–649, 2025. ista: Cunningham T, Caiazzo I, Sienkiewicz G, Wheatley PJ, Gänsicke BT, El-Badry K, Arcodia R, Charbonneau D, Connor L, De K, Hakala P, Kenyon SJ, Maheshwari SK, Rodriguez AC, Van Roestel J, Tremblay PE. 2025. Discovery of two new polars evolved past the period bounce. Monthly Notices of the Royal Astronomical Society. 540(1), 633–649. mla: Cunningham, Tim, et al. “Discovery of Two New Polars Evolved Past the Period Bounce.” Monthly Notices of the Royal Astronomical Society, vol. 540, no. 1, Oxford University Press, 2025, pp. 633–49, doi:10.1093/mnras/staf561. short: T. Cunningham, I. Caiazzo, G. Sienkiewicz, P.J. Wheatley, B.T. Gänsicke, K. El-Badry, R. Arcodia, D. Charbonneau, L. Connor, K. De, P. Hakala, S.J. Kenyon, S.K. Maheshwari, A.C. Rodriguez, J. Van Roestel, P.E. Tremblay, Monthly Notices of the Royal Astronomical Society 540 (2025) 633–649. date_created: 2025-06-15T22:01:29Z date_published: 2025-06-01T00:00:00Z date_updated: 2025-09-30T12:50:33Z day: '01' ddc: - '520' department: - _id: IlCa doi: 10.1093/mnras/staf561 external_id: arxiv: - '2503.12675' isi: - '001493143700001' file: - access_level: open_access checksum: 5e675d3696c222e919d6916bad194b01 content_type: application/pdf creator: dernst date_created: 2025-06-23T07:28:36Z date_updated: 2025-06-23T07:28:36Z file_id: '19864' file_name: 2025_MonthlyNoticesRAS_Cunningham.pdf file_size: 3212636 relation: main_file success: 1 file_date_updated: 2025-06-23T07:28:36Z fulldoi: https://doi.org/10.1093/mnras/staf561 has_accepted_license: '1' intvolume: ' 540' isi: 1 issue: '1' language: - iso: eng month: '06' oa: 1 oa_version: Published Version page: 633-649 publication: Monthly Notices of the Royal Astronomical Society publication_identifier: eissn: - 1365-2966 issn: - 0035-8711 publication_status: published publisher: Oxford University Press quality_controlled: '1' scopus_import: '1' status: public title: Discovery of two new polars evolved past the period bounce tmp: image: /images/cc_by.png legal_code_url: https://creativecommons.org/licenses/by/4.0/legalcode name: Creative Commons Attribution 4.0 International Public License (CC-BY 4.0) short: CC BY (4.0) type: journal_article user_id: 317138e5-6ab7-11ef-aa6d-ffef3953e345 volume: 540 year: '2025' ... --- OA_place: publisher OA_type: gold _id: '19855' abstract: - lang: eng text: We present indirect constraints on the absolute escape fraction of ionizing photons (f_{\rm esc}^{\rm LyC}) of the system GN 42912 which comprises two luminous galaxies (M_{\rm UV} magnitudes of -20.89 and -20.37) at z\sim7.5, GN 42912-NE and GN 42912-SW, to determine their contribution to the ionizing photon budget of the Epoch of Reionization (EoR). The high-resolution James Webb Space Telescope NIRSpec and NIRCam observations reveal the two galaxies are separated by only ~0.1" (0.5 kpc) on the sky and have a 358 km s^{-1} velocity separation. GN 42912-NE and GN 42912-SW are relatively massive for this redshift (log(M_\ast/M_\odot) \sim 8.4 and 8.9, respectively), with gas-phase metallicities of 18 per cent and 23 per cent solar, O_{32} ratios of 5.3 and >5.8, and \beta slopes of -1.92 and -1.51, respectively. We use the Mg II\lambda\lambda2796,2803 doublet to constrain f_{\rm esc}^{\rm LyC}. Mg II has an ionization potential close to that of neutral hydrogen and, in the optically thin regime, can be used as an indirect tracer of the LyC leakage. We establish realistic conservative upper limits on f_{\rm esc}^{\rm LyC} of 8.5 per cent for GN 42912-NE and 14 per cent for GN 42912-SW. These estimates align with f_{\rm esc}^{\rm LyC} trends observed with \beta, O_{32}, and the H\beta equivalent width at z<4. The small inferred ionized region sizes (<0.3 pMpc) around both galaxies indicate they have not ionized a significant fraction of the surrounding neutral gas. While these z>7 f_{\rm esc}^{\rm LyC} constraints do not decisively determine a specific reionization model, they support a minor contribution from these two relatively luminous galaxies to the EoR. acknowledgement: 'This work is based on observations made with the NASA/ESA/CSA JWST. The data were obtained from the Mikulski Archive for Space Telescopes at the Space Telescope Science Institute, which is operated by the Association of Universities for Research in Astronomy, Inc., under NASA contract NAS 5–03127 for JWST. These observations are associated with program #01871. Support for program #01871 was provided by NASA through a grant from the Space Telescope Science Institute, which is operated by the Association of Universities for Research in Astronomy, Inc., under NASA contract NAS 5–03127. SG is grateful for the support enabled by the Harlan J. Smith McDonald fellowship. YI and NG acknowledge support from the Simons Foundation and the National Academy of Sciences of Ukraine (Project 0121U109612). ASL acknowledges support from Knut and Alice Wallenberg Foundation.' article_processing_charge: Yes article_type: original arxiv: 1 author: - first_name: S. full_name: Gazagnes, S. last_name: Gazagnes - first_name: J. full_name: Chisholm, J. last_name: Chisholm - first_name: R. full_name: Endsley, R. last_name: Endsley - first_name: D. A. full_name: Berg, D. A. last_name: Berg - first_name: F. full_name: Leclercq, F. last_name: Leclercq - first_name: N. full_name: Jurlin, N. last_name: Jurlin - first_name: A. full_name: Saldana-Lopez, A. last_name: Saldana-Lopez - first_name: S. L. full_name: Finkelstein, S. L. last_name: Finkelstein - first_name: S. R. full_name: Flury, S. R. last_name: Flury - first_name: N. G. full_name: Guseva, N. G. last_name: Guseva - first_name: A. full_name: Henry, A. last_name: Henry - first_name: Y. I. full_name: Izotov, Y. I. last_name: Izotov - first_name: I. full_name: Jung, I. last_name: Jung - first_name: Jorryt J full_name: Matthee, Jorryt J id: 7439a258-f3c0-11ec-9501-9df22fe06720 last_name: Matthee orcid: 0000-0003-2871-127X - first_name: D. full_name: Schaerer, D. last_name: Schaerer citation: ama: Gazagnes S, Chisholm J, Endsley R, et al. A negligible contribution of two luminous z ∼7.5 galaxies to the ionizing photon budget of reionization. Monthly Notices of the Royal Astronomical Society. 2025;540(3):2331-2348. doi:10.1093/mnras/staf768 apa: Gazagnes, S., Chisholm, J., Endsley, R., Berg, D. A., Leclercq, F., Jurlin, N., … Schaerer, D. (2025). A negligible contribution of two luminous z ∼7.5 galaxies to the ionizing photon budget of reionization. Monthly Notices of the Royal Astronomical Society. Oxford University Press. https://doi.org/10.1093/mnras/staf768 chicago: Gazagnes, S., J. Chisholm, R. Endsley, D. A. Berg, F. Leclercq, N. Jurlin, A. Saldana-Lopez, et al. “A Negligible Contribution of Two Luminous z ∼7.5 Galaxies to the Ionizing Photon Budget of Reionization.” Monthly Notices of the Royal Astronomical Society. Oxford University Press, 2025. https://doi.org/10.1093/mnras/staf768. ieee: S. Gazagnes et al., “A negligible contribution of two luminous z ∼7.5 galaxies to the ionizing photon budget of reionization,” Monthly Notices of the Royal Astronomical Society, vol. 540, no. 3. Oxford University Press, pp. 2331–2348, 2025. ista: Gazagnes S, Chisholm J, Endsley R, Berg DA, Leclercq F, Jurlin N, Saldana-Lopez A, Finkelstein SL, Flury SR, Guseva NG, Henry A, Izotov YI, Jung I, Matthee JJ, Schaerer D. 2025. A negligible contribution of two luminous z ∼7.5 galaxies to the ionizing photon budget of reionization. Monthly Notices of the Royal Astronomical Society. 540(3), 2331–2348. mla: Gazagnes, S., et al. “A Negligible Contribution of Two Luminous z ∼7.5 Galaxies to the Ionizing Photon Budget of Reionization.” Monthly Notices of the Royal Astronomical Society, vol. 540, no. 3, Oxford University Press, 2025, pp. 2331–48, doi:10.1093/mnras/staf768. short: S. Gazagnes, J. Chisholm, R. Endsley, D.A. Berg, F. Leclercq, N. Jurlin, A. Saldana-Lopez, S.L. Finkelstein, S.R. Flury, N.G. Guseva, A. Henry, Y.I. Izotov, I. Jung, J.J. Matthee, D. Schaerer, Monthly Notices of the Royal Astronomical Society 540 (2025) 2331–2348. date_created: 2025-06-22T22:02:05Z date_published: 2025-07-01T00:00:00Z date_updated: 2025-09-30T13:34:20Z day: '01' ddc: - '520' department: - _id: JoMa doi: 10.1093/mnras/staf768 external_id: arxiv: - '2410.03337' isi: - '001506103600001' file: - access_level: open_access checksum: f912c990a0474f1ddf9be6b8a89c7759 content_type: application/pdf creator: dernst date_created: 2025-06-23T11:02:59Z date_updated: 2025-06-23T11:02:59Z file_id: '19870' file_name: 2025_MonthlyNoticesRAS_Gazagnes.pdf file_size: 3111567 relation: main_file success: 1 file_date_updated: 2025-06-23T11:02:59Z fulldoi: https://doi.org/10.1093/mnras/staf768 has_accepted_license: '1' intvolume: ' 540' isi: 1 issue: '3' language: - iso: eng month: '07' oa: 1 oa_version: Published Version page: 2331-2348 publication: Monthly Notices of the Royal Astronomical Society publication_identifier: eissn: - 1365-2966 issn: - 0035-8711 publication_status: published publisher: Oxford University Press quality_controlled: '1' scopus_import: '1' status: public title: A negligible contribution of two luminous z ∼7.5 galaxies to the ionizing photon budget of reionization tmp: image: /images/cc_by.png legal_code_url: https://creativecommons.org/licenses/by/4.0/legalcode name: Creative Commons Attribution 4.0 International Public License (CC-BY 4.0) short: CC BY (4.0) type: journal_article user_id: 317138e5-6ab7-11ef-aa6d-ffef3953e345 volume: 540 year: '2025' ... --- DOAJ_listed: '1' OA_place: publisher OA_type: gold PlanS_conform: '1' _id: '20027' abstract: - lang: eng text: "We present the first results of the JWST Emission Line Survey (JELS). Utilizing the first NIRCam narrow-band imaging at 4.7 μm, over 63 arcmin2 in the PRIMER/COSMOS field, we have identified 609 emission line galaxy candidates. From these, we robustly selected 35 H α star-forming galaxies at z ∼ 6.1, with H α star-formation rates (SFRH α) of ∼ 0.9 − 15 M yr−1.\r\nCombining our unique H α sample with the exquisite panchromatic data in the field, we explored their physical properties and star-formation histories, and compared these to a broad-band selected sample at z ∼ 6 which has offered vital new insights into the nature of high-redshift galaxies. UV-continuum slopes (β) were considerably redder for our H α sample (\x04β\x05 ∼ −1.92)\r\ncompared to the broad-band sample (\x04β\x05 ∼ −2.35). This was not due to dust attenuation as our H α sample was relatively dustpoor (median AV = 0.23); instead, we argue that the reddened slopes could be due to nebular continuum. We compared SFRH α and the UV-continuum-derived SFRUV to SED-fitted measurements averaged over canonical time-scales of 10 and 100 Myr (SFR10 and SFR100). We found an increase in recent SFR for our sample of H α emitters, particularly at lower stellar masses (< 109 M). We also found that SFRH α strongly traces SFR averaged over 10 Myr time-scales, whereas the UV-continuum overpredicts SFR on 100 Myr time-scales at low stellar masses. These results point to our H α sample undergoing ‘bursty’ star\r\nformation. Our F356W z ∼ 6 sample showed a larger scatter in SFR10/SFR100 across all stellar masses, which has highlighted how narrow-band photometric selections of H α emitters are key to quantifying the burstiness of star-formation activity. " acknowledgement: "The authors would like to thank Adam Carnall and Joel Leja for their helpful advice with the SED fitting of our sample, Callum Donnan for his advice on the selection techniques of high-redshift\r\ngalaxies, Alice Shapley for discussion around H α SFR calibrations at high-redshift, Fred Jennings for providing insight into the interpretation of SFR ratios, and the anonymous referee for their helpful comments – all of which have greatly improved this paper. Several other authors acknowledge the support of the UK Science and Technology Facilities Council (STFC) via grants ST/W507441/1 (CAP), ST/V000594/1 (DJM, PNB, RK, and RJM), ST/Y000951/1 (PNB and RK) and ST/X001075/1 (AMS and IRS), and through an Ernest Rutherford Fellowship (KJD; grant number ST/W003120/1). RKC was funded by support for programme #02321, provided by\r\nNASA through a grant from the Space Telescope Science Institute, which is operated by the Association of Universities for Research in Astronomy, Inc., under NASA contract NAS5-03127. RKC and CLH are both grateful for support from the Leverhulme Trust via a Leverhulme Early Career Fellowship, and CLH also acknowledges support from the Oxford Hintze Centre for Astrophysical Surveys which is funded through generous support from the Hintze Family\r\nCharitable Foundation. JSD acknowledges the support of the Royal Society via a Royal Society Research Professorship. EI gratefully acknowledge financialsupport from ANID–MILENIO–NCN2024 112 and ANID FONDECYT Regular 1221846. LOF acknowledges by ANID BECAS/DOCTORADO NACIONAL 21220499." article_processing_charge: Yes article_type: original arxiv: 1 author: - first_name: C. A. full_name: Pirie, C. A. last_name: Pirie - first_name: P. N. full_name: Best, P. N. last_name: Best - first_name: K. J. full_name: Duncan, K. J. last_name: Duncan - first_name: D. J. full_name: Mcleod, D. J. last_name: Mcleod - first_name: R. K. full_name: Cochrane, R. K. last_name: Cochrane - first_name: M. full_name: Clausen, M. last_name: Clausen - first_name: J. S. full_name: Dunlop, J. S. last_name: Dunlop - first_name: S. R. full_name: Flury, S. R. last_name: Flury - first_name: J. E. full_name: Geach, J. E. last_name: Geach - first_name: C. L. full_name: Hale, C. L. last_name: Hale - first_name: E. full_name: Ibar, E. last_name: Ibar - first_name: R. full_name: Kondapally, R. last_name: Kondapally - first_name: Zefeng full_name: Li, Zefeng last_name: Li - first_name: Jorryt J full_name: Matthee, Jorryt J id: 7439a258-f3c0-11ec-9501-9df22fe06720 last_name: Matthee orcid: 0000-0003-2871-127X - first_name: R. J. full_name: Mclure, R. J. last_name: Mclure - first_name: L. full_name: Ossa-Fuentes, L. last_name: Ossa-Fuentes - first_name: A. L. full_name: Patrick, A. L. last_name: Patrick - first_name: Ian full_name: Smail, Ian last_name: Smail - first_name: D. full_name: Sobral, D. last_name: Sobral - first_name: H. M.O. full_name: Stephenson, H. M.O. last_name: Stephenson - first_name: J. P. full_name: Stott, J. P. last_name: Stott - first_name: A. M. full_name: Swinbank, A. M. last_name: Swinbank citation: ama: 'Pirie CA, Best PN, Duncan KJ, et al. The JWST Emission Line Survey (JELS): An untargeted search for H α emission line galaxies at z > 6 and their physical properties. Monthly Notices of the Royal Astronomical Society. 2025;541(2):1348-1376. doi:10.1093/mnras/staf1006' apa: 'Pirie, C. A., Best, P. N., Duncan, K. J., Mcleod, D. J., Cochrane, R. K., Clausen, M., … Swinbank, A. M. (2025). The JWST Emission Line Survey (JELS): An untargeted search for H α emission line galaxies at z > 6 and their physical properties. Monthly Notices of the Royal Astronomical Society. Oxford University Press. https://doi.org/10.1093/mnras/staf1006' chicago: 'Pirie, C. A., P. N. Best, K. J. Duncan, D. J. Mcleod, R. K. Cochrane, M. Clausen, J. S. Dunlop, et al. “The JWST Emission Line Survey (JELS): An Untargeted Search for H α Emission Line Galaxies at z > 6 and Their Physical Properties.” Monthly Notices of the Royal Astronomical Society. Oxford University Press, 2025. https://doi.org/10.1093/mnras/staf1006.' ieee: 'C. A. Pirie et al., “The JWST Emission Line Survey (JELS): An untargeted search for H α emission line galaxies at z > 6 and their physical properties,” Monthly Notices of the Royal Astronomical Society, vol. 541, no. 2. Oxford University Press, pp. 1348–1376, 2025.' ista: 'Pirie CA, Best PN, Duncan KJ, Mcleod DJ, Cochrane RK, Clausen M, Dunlop JS, Flury SR, Geach JE, Hale CL, Ibar E, Kondapally R, Li Z, Matthee JJ, Mclure RJ, Ossa-Fuentes L, Patrick AL, Smail I, Sobral D, Stephenson HMO, Stott JP, Swinbank AM. 2025. The JWST Emission Line Survey (JELS): An untargeted search for H α emission line galaxies at z > 6 and their physical properties. Monthly Notices of the Royal Astronomical Society. 541(2), 1348–1376.' mla: 'Pirie, C. A., et al. “The JWST Emission Line Survey (JELS): An Untargeted Search for H α Emission Line Galaxies at z > 6 and Their Physical Properties.” Monthly Notices of the Royal Astronomical Society, vol. 541, no. 2, Oxford University Press, 2025, pp. 1348–76, doi:10.1093/mnras/staf1006.' short: C.A. Pirie, P.N. Best, K.J. Duncan, D.J. Mcleod, R.K. Cochrane, M. Clausen, J.S. Dunlop, S.R. Flury, J.E. Geach, C.L. Hale, E. Ibar, R. Kondapally, Z. Li, J.J. Matthee, R.J. Mclure, L. Ossa-Fuentes, A.L. Patrick, I. Smail, D. Sobral, H.M.O. Stephenson, J.P. Stott, A.M. Swinbank, Monthly Notices of the Royal Astronomical Society 541 (2025) 1348–1376. date_created: 2025-07-20T22:02:00Z date_published: 2025-08-01T00:00:00Z date_updated: 2025-09-30T14:03:40Z day: '01' ddc: - '520' department: - _id: JoMa doi: 10.1093/mnras/staf1006 external_id: arxiv: - '2410.11808' isi: - '001527095600001' file: - access_level: open_access checksum: f8708c78016f8917765026502c6b50b6 content_type: application/pdf creator: dernst date_created: 2025-07-22T07:19:20Z date_updated: 2025-07-22T07:19:20Z file_id: '20064' file_name: 2025_MonthlyNoticesRAS_Pirie.pdf file_size: 38102038 relation: main_file success: 1 file_date_updated: 2025-07-22T07:19:20Z fulldoi: https://doi.org/10.1093/mnras/staf1006 has_accepted_license: '1' intvolume: ' 541' isi: 1 issue: '2' language: - iso: eng month: '08' oa: 1 oa_version: Published Version page: 1348-1376 publication: Monthly Notices of the Royal Astronomical Society publication_identifier: eissn: - 1365-2966 issn: - 0035-8711 publication_status: published publisher: Oxford University Press quality_controlled: '1' scopus_import: '1' status: public title: 'The JWST Emission Line Survey (JELS): An untargeted search for H α emission line galaxies at z > 6 and their physical properties' tmp: image: /images/cc_by.png legal_code_url: https://creativecommons.org/licenses/by/4.0/legalcode name: Creative Commons Attribution 4.0 International Public License (CC-BY 4.0) short: CC BY (4.0) type: journal_article user_id: 317138e5-6ab7-11ef-aa6d-ffef3953e345 volume: 541 year: '2025' ...