---
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. <i>Monthly Notices of the Royal Astronomical
    Society</i>. 2026;545(3). doi:<a href="https://doi.org/10.1093/mnras/staf2219">10.1093/mnras/staf2219</a>
  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. <i>Monthly Notices of the Royal Astronomical Society</i>.
    Oxford University Press. <a href="https://doi.org/10.1093/mnras/staf2219">https://doi.org/10.1093/mnras/staf2219</a>
  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.” <i>Monthly Notices
    of the Royal Astronomical Society</i>. Oxford University Press, 2026. <a href="https://doi.org/10.1093/mnras/staf2219">https://doi.org/10.1093/mnras/staf2219</a>.
  ieee: T. Kist <i>et al.</i>, “First constraints on the local ionization topology
    in front of two quasars at z ∼ 7.5,” <i>Monthly Notices of the Royal Astronomical
    Society</i>, 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.” <i>Monthly Notices of the Royal Astronomical Society</i>,
    vol. 545, no. 3, staf2219, Oxford University Press, 2026, doi:<a href="https://doi.org/10.1093/mnras/staf2219">10.1093/mnras/staf2219</a>.
  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
has_accepted_license: '1'
intvolume: '       545'
issue: '3'
language:
- iso: eng
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'
...
---
OA_place: repository
OA_type: green
_id: '20193'
abstract:
- lang: eng
  text: Understanding the rapid formation of supermassive black holes in the early
    Universe requires insights into stellar mass growth in host galaxies. Here we
    present NIRSpec rest-frame optical spectra and NIRCam imaging from JWST of two
    galaxies at z > 6, both hosting moderate-luminosity quasars. These galaxies exhibit
    Balmer absorption lines, like low-redshift post-starburst galaxies. Our analyses
    of the medium-resolution spectra and multiband photometry show that the bulk of
    the stellar mass (log(M*/M☉) ≥ 10.6) formed in starburst episodes at redshift
    9 and 7. One of the galaxies shows a clear Balmer break and lacks spatially resolved
    Hα emission. It falls well below the star-formation main sequence at z = 6, indicating
    quiescence. The other is transitioning to quiescence; together, these massive
    galaxies are among the most distant post-starburst systems known. The blueshifted
    wings of the quasar [O iii] emission lines indicate quasar-driven outflow, which
    possibly influences star formation. Direct stellar velocity dispersion measurements
    reveal that one galaxy follows the local black hole mass versus σ* relation whereas
    the other is overmassive. The existence of massive post-starburst galaxies hosting
    billion-solar-mass black holes in short-lived quasar phases indicates that supermassive
    black holes and host galaxies played a principal role in each other’s rapid early
    formation.
acknowledgement: We thank A. C. Carnall for supporting our use of Bagpipes. We thank
  Y. Fu for his help on the use of QSOFitMORE. We thank J. Greene, S. Toft, T. Kakimoto
  and M. Tanaka for fruitful discussions. 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, under NASA contract NAS
  5-03127 for JWST. These observations are associated with programmes GO 1967 and
  GO 3859. Support for these programmes was provided by NASA through a grant from
  the Space Telescope Science Institute. This work was supported by World Premier
  International Research Center Initiative, MEXT, Japan. This work used computing
  resources at Kavli IPMU. M.O., X.D., J.D.S., Y.M., T.I., K. Ito, K.K. and H.U. are
  supported by the Japan Society for the Promotion of Science (KAKENHI Grant Numbers
  JP24K22894, JP22K14071, JP18H01251, JP22H01262, JP21H04494, JP20K14531, JP23K13141,
  JP17H06130 and JP20H01953). M.O. and K. Inayoshi acknowledge support from the National
  Natural Science Foundation of China (Grant Numbers 12150410307, 12073003, 11721303,
  11991052 and 11950410493). K. Inayoshi acknowledges support from the China Manned
  Space Project (Grant Numbers CMS-CSST-2021-A04 and CMS-CSST-2021-A06). S.E.I.B.
  is funded by the Deutsche Forschungsgemeinschaft (German Research Foundation) under
  Emmy Noether Grant Number BO 5771/1-1. Z.H., T.T. and M.S. acknowledge support from
  the NSF (Grant Numbers AST-2006176, AST-1907208 and AST-2006177). A.L. acknowledges
  funding from MUR (Grant Number PRIN 2022935STW). B.T. acknowledges support from
  the European Research Council (ERC) under the European Union’s Horizon 2020 research
  and innovation programme (Grant Agreement Number 950533) and from the Israel Science
  Foundation (Grant Number 1849/19). F. Walter acknowledges support from the ERC (Grant
  Cosmic_gas). J.-T.S. is supported by the Deutsche Forschungsgemeinschaft (Project
  Number 518006966). M.T. acknowledges support from the NWO (Grant Number 0.16.VIDI.189.162,
  ODIN). S.F. acknowledges support from NASA through the NASA Hubble Fellowship (Grant
  Number HST-HF2-51505.001-A awarded by the Space Telescope Science Institute). K.
  Iwasawa acknowledges support under Grant Number PID2022-136827NB-C44 funded by MCIN/AEI/10.13039/501100011033
  /FEDER, EU. M. Vestergaard gratefully acknowledges financial support from the Independent
  Research Fund Denmark (Grant Numbers DFF 8021-00130 and 3103-00146). F. Wang acknowledges
  support from the NSF (Award Number AST-2513040). R.B. is supported by the SNSF through
  the Ambizione Grant PZ00P2_223532.
article_processing_charge: No
article_type: original
arxiv: 1
author:
- first_name: Masafusa
  full_name: Onoue, Masafusa
  last_name: Onoue
- first_name: Xuheng
  full_name: Ding, Xuheng
  last_name: Ding
- first_name: John D.
  full_name: Silverman, John D.
  last_name: Silverman
- first_name: Yoshiki
  full_name: Matsuoka, Yoshiki
  last_name: Matsuoka
- first_name: Takuma
  full_name: Izumi, Takuma
  last_name: Izumi
- first_name: Michael A.
  full_name: Strauss, Michael A.
  last_name: Strauss
- first_name: Charlotte
  full_name: Ward, Charlotte
  last_name: Ward
- first_name: Camryn L.
  full_name: Phillips, Camryn L.
  last_name: Phillips
- first_name: Kei
  full_name: Ito, Kei
  last_name: Ito
- first_name: Irham T.
  full_name: Andika, Irham T.
  last_name: Andika
- first_name: Kentaro
  full_name: Aoki, Kentaro
  last_name: Aoki
- first_name: Junya
  full_name: Arita, Junya
  last_name: Arita
- first_name: Shunsuke
  full_name: Baba, Shunsuke
  last_name: Baba
- first_name: Rebekka
  full_name: Bieri, Rebekka
  last_name: Bieri
- first_name: Sarah E.I.
  full_name: Bosman, Sarah E.I.
  last_name: Bosman
- first_name: Anna Christina
  full_name: Eilers, Anna Christina
  last_name: Eilers
- first_name: Seiji
  full_name: Fujimoto, Seiji
  last_name: Fujimoto
- first_name: Melanie
  full_name: Habouzit, Melanie
  last_name: Habouzit
- first_name: Zoltán
  full_name: Haiman, Zoltán
  id: 7c006e8c-cc0d-11ee-8322-cb904ef76f36
  last_name: Haiman
  orcid: 0000-0003-3633-5403
- first_name: Masatoshi
  full_name: Imanishi, Masatoshi
  last_name: Imanishi
- first_name: Kohei
  full_name: Inayoshi, Kohei
  last_name: Inayoshi
- first_name: Kazushi
  full_name: Iwasawa, Kazushi
  last_name: Iwasawa
- first_name: Knud
  full_name: Jahnke, Knud
  last_name: Jahnke
- first_name: Nobunari
  full_name: Kashikawa, Nobunari
  last_name: Kashikawa
- first_name: Toshihiro
  full_name: Kawaguchi, Toshihiro
  last_name: Kawaguchi
- first_name: Kotaro
  full_name: Kohno, Kotaro
  last_name: Kohno
- first_name: Chien Hsiu
  full_name: Lee, Chien Hsiu
  last_name: Lee
- first_name: Junyao
  full_name: Li, Junyao
  last_name: Li
- first_name: Alessandro
  full_name: Lupi, Alessandro
  last_name: Lupi
- first_name: Jianwei
  full_name: Lyu, Jianwei
  last_name: Lyu
- first_name: Tohru
  full_name: Nagao, Tohru
  last_name: Nagao
- first_name: Roderik
  full_name: Overzier, Roderik
  last_name: Overzier
- first_name: Jan Torge
  full_name: Schindler, Jan Torge
  last_name: Schindler
- first_name: Malte
  full_name: Schramm, Malte
  last_name: Schramm
- first_name: Matthew T.
  full_name: Scoggins, Matthew T.
  last_name: Scoggins
- first_name: Kazuhiro
  full_name: Shimasaku, Kazuhiro
  last_name: Shimasaku
- first_name: Yoshiki
  full_name: Toba, Yoshiki
  last_name: Toba
- first_name: Benny
  full_name: Trakhtenbrot, Benny
  last_name: Trakhtenbrot
- first_name: Maxime
  full_name: Trebitsch, Maxime
  last_name: Trebitsch
- first_name: Tommaso
  full_name: Treu, Tommaso
  last_name: Treu
- first_name: Hideki
  full_name: Umehata, Hideki
  last_name: Umehata
- first_name: Bram
  full_name: Venemans, Bram
  last_name: Venemans
- first_name: Marianne
  full_name: Vestergaard, Marianne
  last_name: Vestergaard
- first_name: Marta
  full_name: Volonteri, Marta
  last_name: Volonteri
- first_name: Fabian
  full_name: Walter, Fabian
  last_name: Walter
- first_name: Feige
  full_name: Wang, Feige
  last_name: Wang
- first_name: Jinyi
  full_name: Yang, Jinyi
  last_name: Yang
- first_name: Haowen
  full_name: Zhang, Haowen
  last_name: Zhang
citation:
  ama: Onoue M, Ding X, Silverman JD, et al. A post-starburst pathway for the formation
    of massive galaxies and black holes at z &#62; 6. <i>Nature Astronomy</i>. 2025;9:1541-1552.
    doi:<a href="https://doi.org/10.1038/s41550-025-02628-1">10.1038/s41550-025-02628-1</a>
  apa: Onoue, M., Ding, X., Silverman, J. D., Matsuoka, Y., Izumi, T., Strauss, M.
    A., … Zhang, H. (2025). A post-starburst pathway for the formation of massive
    galaxies and black holes at z &#62; 6. <i>Nature Astronomy</i>. Springer Nature.
    <a href="https://doi.org/10.1038/s41550-025-02628-1">https://doi.org/10.1038/s41550-025-02628-1</a>
  chicago: Onoue, Masafusa, Xuheng Ding, John D. Silverman, Yoshiki Matsuoka, Takuma
    Izumi, Michael A. Strauss, Charlotte Ward, et al. “A Post-Starburst Pathway for
    the Formation of Massive Galaxies and Black Holes at z &#62; 6.” <i>Nature Astronomy</i>.
    Springer Nature, 2025. <a href="https://doi.org/10.1038/s41550-025-02628-1">https://doi.org/10.1038/s41550-025-02628-1</a>.
  ieee: M. Onoue <i>et al.</i>, “A post-starburst pathway for the formation of massive
    galaxies and black holes at z &#62; 6,” <i>Nature Astronomy</i>, vol. 9. Springer
    Nature, pp. 1541–1552, 2025.
  ista: Onoue M, Ding X, Silverman JD, Matsuoka Y, Izumi T, Strauss MA, Ward C, Phillips
    CL, Ito K, Andika IT, Aoki K, Arita J, Baba S, Bieri R, Bosman SEI, Eilers AC,
    Fujimoto S, Habouzit M, Haiman Z, Imanishi M, Inayoshi K, Iwasawa K, Jahnke K,
    Kashikawa N, Kawaguchi T, Kohno K, Lee CH, Li J, Lupi A, Lyu J, Nagao T, Overzier
    R, Schindler JT, Schramm M, Scoggins MT, Shimasaku K, Toba Y, Trakhtenbrot B,
    Trebitsch M, Treu T, Umehata H, Venemans B, Vestergaard M, Volonteri M, Walter
    F, Wang F, Yang J, Zhang H. 2025. A post-starburst pathway for the formation of
    massive galaxies and black holes at z &#62; 6. Nature Astronomy. 9, 1541–1552.
  mla: Onoue, Masafusa, et al. “A Post-Starburst Pathway for the Formation of Massive
    Galaxies and Black Holes at z &#62; 6.” <i>Nature Astronomy</i>, vol. 9, Springer
    Nature, 2025, pp. 1541–52, doi:<a href="https://doi.org/10.1038/s41550-025-02628-1">10.1038/s41550-025-02628-1</a>.
  short: M. Onoue, X. Ding, J.D. Silverman, Y. Matsuoka, T. Izumi, M.A. Strauss, C.
    Ward, C.L. Phillips, K. Ito, I.T. Andika, K. Aoki, J. Arita, S. Baba, R. Bieri,
    S.E.I. Bosman, A.C. Eilers, S. Fujimoto, M. Habouzit, Z. Haiman, M. Imanishi,
    K. Inayoshi, K. Iwasawa, K. Jahnke, N. Kashikawa, T. Kawaguchi, K. Kohno, C.H.
    Lee, J. Li, A. Lupi, J. Lyu, T. Nagao, R. Overzier, J.T. Schindler, M. Schramm,
    M.T. Scoggins, K. Shimasaku, Y. Toba, B. Trakhtenbrot, M. Trebitsch, T. Treu,
    H. Umehata, B. Venemans, M. Vestergaard, M. Volonteri, F. Walter, F. Wang, J.
    Yang, H. Zhang, Nature Astronomy 9 (2025) 1541–1552.
date_created: 2025-08-17T22:01:38Z
date_published: 2025-10-01T00:00:00Z
date_updated: 2025-12-30T13:08:12Z
day: '01'
department:
- _id: ZoHa
doi: 10.1038/s41550-025-02628-1
external_id:
  arxiv:
  - '2409.07113'
  isi:
  - '001548138600001'
intvolume: '         9'
isi: 1
language:
- iso: eng
main_file_link:
- open_access: '1'
  url: https://arxiv.org/abs/2409.07113
month: '10'
oa: 1
oa_version: Preprint
page: 1541-1552
publication: Nature Astronomy
publication_identifier:
  eissn:
  - 2397-3366
publication_status: published
publisher: Springer Nature
quality_controlled: '1'
scopus_import: '1'
status: public
title: A post-starburst pathway for the formation of massive galaxies and black holes
  at z > 6
type: journal_article
user_id: 2DF688A6-F248-11E8-B48F-1D18A9856A87
volume: 9
year: '2025'
...
---
DOAJ_listed: '1'
OA_place: publisher
OA_type: gold
PlanS_conform: '1'
_id: '20250'
abstract:
- lang: eng
  text: "Population III stars are possible precursors to early supermassive black
    holes (BHs). The presence of soft UV Lyman–Werner (LW) background radiation can
    suppress Population III star formation in minihaloes and allow them to form in
    pristine atomic-cooling haloes. In the absence of molecular hydrogen (⁠H2⁠) cooling,
    atomic-cooling haloes enable rapid collapse with suppressed fragmentation. High
    background LW fluxes from preceding star-formation have been proposed to dissociate
    H2⁠. This flux can be supplemented by LW radiation from one or more Population
    III star(s) in the same halo, reducing the necessary background level. Here, we
    consider atomic-cooling haloes in which multiple protostellar cores form close
    to one another nearly simultaneously. We assess whether the first star’s LW radiation
    can dissociate nearby \r\n⁠, enabling rapid accretion on to a nearby protostellar
    core, and the prompt formation of a second, supermassive star (SMS) from warm,
    atomically-cooled gas. We use a set of hydrodynamical simulations with the code
    enzo, with identical LW backgrounds centred on a halo with two adjacent collapsing
    gas clumps. When an additional large local LW flux is introduced, we observe immediate
    reductions in both the accretion rates and the stellar masses that form within
    these clumps. While the LW flux reduces the H2 fraction and increases the gas
    temperature, the halo core’s potential well is too shallow to promptly heat the
    gas to >1000 K and increase the second protostar’s accretion rate. We conclude
    that this internal LW feedback scenario is unlikely to facilitate SMS or massive
    BH seed formation."
acknowledgement: We thank the anonymous referee for comments that helped us improve
  the clarity of this manuscript. We acknowledge support from the United States National
  Science Foundation (NSF) grant AST-2006176 and the National Aeronautics and Space
  Administration (NASA) grants 80NSSC24K0440 and 80NSSC22K0822 (ZH). We also acknowledge
  support from NSF grant AST-2009309, NASA Astrophysics Theory Program grant 80NSSC22K0629,
  and Space Telescope Science Institute grant JWST-AR-05238 (EV). The simulations
  in this work were run on Texas Advanced Computing Center’s Stampede2 and Stampede3
  systems. We used Stampede2 and Purdue University’s computing system Anvil for data
  analysis.
article_processing_charge: Yes
article_type: original
arxiv: 1
author:
- first_name: James
  full_name: Sullivan, James
  last_name: Sullivan
- first_name: Zoltán
  full_name: Haiman, Zoltán
  id: 7c006e8c-cc0d-11ee-8322-cb904ef76f36
  last_name: Haiman
  orcid: 0000-0003-3633-5403
- first_name: Mihir
  full_name: Kulkarni, Mihir
  last_name: Kulkarni
- first_name: Eli
  full_name: Visbal, Eli
  last_name: Visbal
citation:
  ama: Sullivan J, Haiman Z, Kulkarni M, Visbal E. Can supermassive stars form in
    protogalaxies due to internal Lyman-Werner feedback? <i>Monthly Notices of the
    Royal Astronomical Society</i>. 2025;542(2):822-838. doi:<a href="https://doi.org/10.1093/mnras/staf1269">10.1093/mnras/staf1269</a>
  apa: Sullivan, J., Haiman, Z., Kulkarni, M., &#38; Visbal, E. (2025). Can supermassive
    stars form in protogalaxies due to internal Lyman-Werner feedback? <i>Monthly
    Notices of the Royal Astronomical Society</i>. Oxford University Press. <a href="https://doi.org/10.1093/mnras/staf1269">https://doi.org/10.1093/mnras/staf1269</a>
  chicago: Sullivan, James, Zoltán Haiman, Mihir Kulkarni, and Eli Visbal. “Can Supermassive
    Stars Form in Protogalaxies Due to Internal Lyman-Werner Feedback?” <i>Monthly
    Notices of the Royal Astronomical Society</i>. Oxford University Press, 2025.
    <a href="https://doi.org/10.1093/mnras/staf1269">https://doi.org/10.1093/mnras/staf1269</a>.
  ieee: J. Sullivan, Z. Haiman, M. Kulkarni, and E. Visbal, “Can supermassive stars
    form in protogalaxies due to internal Lyman-Werner feedback?,” <i>Monthly Notices
    of the Royal Astronomical Society</i>, vol. 542, no. 2. Oxford University Press,
    pp. 822–838, 2025.
  ista: Sullivan J, Haiman Z, Kulkarni M, Visbal E. 2025. Can supermassive stars form
    in protogalaxies due to internal Lyman-Werner feedback? Monthly Notices of the
    Royal Astronomical Society. 542(2), 822–838.
  mla: Sullivan, James, et al. “Can Supermassive Stars Form in Protogalaxies Due to
    Internal Lyman-Werner Feedback?” <i>Monthly Notices of the Royal Astronomical
    Society</i>, vol. 542, no. 2, Oxford University Press, 2025, pp. 822–38, doi:<a
    href="https://doi.org/10.1093/mnras/staf1269">10.1093/mnras/staf1269</a>.
  short: J. Sullivan, Z. Haiman, M. Kulkarni, E. Visbal, Monthly Notices of the Royal
    Astronomical Society 542 (2025) 822–838.
date_created: 2025-08-31T22:01:31Z
date_published: 2025-09-01T00:00:00Z
date_updated: 2025-09-30T14:28:05Z
day: '01'
ddc:
- '520'
department:
- _id: ZoHa
doi: 10.1093/mnras/staf1269
external_id:
  arxiv:
  - '2501.12986'
  isi:
  - '001553472000001'
file:
- access_level: open_access
  checksum: 2a06796b27da0b33d479dba170ba4b3f
  content_type: application/pdf
  creator: dernst
  date_created: 2025-09-03T05:44:47Z
  date_updated: 2025-09-03T05:44:47Z
  file_id: '20279'
  file_name: 2025_MonthlyNoticesRAS_Sullivan.pdf
  file_size: 2780496
  relation: main_file
  success: 1
file_date_updated: 2025-09-03T05:44:47Z
has_accepted_license: '1'
intvolume: '       542'
isi: 1
issue: '2'
language:
- iso: eng
month: '09'
oa: 1
oa_version: Published Version
page: 822-838
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: Can supermassive stars form in protogalaxies due to internal Lyman-Werner feedback?
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: 542
year: '2025'
...
---
DOAJ_listed: '1'
OA_place: publisher
OA_type: gold
PlanS_conform: '1'
_id: '20493'
abstract:
- lang: eng
  text: 'We propose a formation pathway linking black holes (BHs) observed in gravitational-wave
    (GW) mergers, wide BH–stellar systems uncovered by Gaia, and accreting low-mass
    X-ray binaries (LMXBs). In this scenario, a stellar-mass BH binary undergoes isolated
    binary evolution and merges while hosting a distant, dynamically unimportant tertiary
    stellar companion. The tertiary becomes relevant only after the merger, when the
    remnant BH receives a GW recoil kick. Depending on the kick velocity and system
    configuration, the outcome can be: (1) a bright electromagnetic (EM) counterpart
    to the GW merger; (2) an LMXB; (3) a wide BH–stellar companion system resembling
    the Gaia BH population; or (4) an unbound isolated BH. Modeling the three-body
    dynamics, we find that ∼0.02% of LIGO–Virgo–KAGRA (LVK) mergers may be followed
    by an EM counterpart within ∼10 days, produced by tidal disruption of the star
    by the BH. The flare is likely brightest in the optical–UV and lasts for days
    to weeks; in some cases, partial disruption causes recurring flares with a period
    of ∼2 months. We further estimate that this channel can produce ∼1%–10% of Gaia
    BH systems in the Milky Way. This scenario provides the first physically motivated
    link between GW sources, Gaia BHs, and some X-ray binaries, and predicts a rare
    but robust pathway for EM counterparts to binary BH mergers, potentially detectable
    in LVK’s O5 run.'
acknowledgement: We thank the anonymous referee for the useful and detailed report.
  S.N. acknowledges the partial support of NSF-BSF grant AST-2206428 and NASA XRP
  grant 80NSSC23K0262, as well as Howard and Astrid Preston for their generous support.
  Z.H. acknowledges support from NASA grants 80NSSC22K0822 and 80NSSC24K0440. E.Q.
  thanks the Gordon and Betty Moore Foundation for support through grant GBMF5076.
article_number: L12
article_processing_charge: Yes
article_type: original
arxiv: 1
author:
- first_name: Smadar
  full_name: Naoz, Smadar
  last_name: Naoz
- first_name: Zoltán
  full_name: Haiman, Zoltán
  id: 7c006e8c-cc0d-11ee-8322-cb904ef76f36
  last_name: Haiman
  orcid: 0000-0003-3633-5403
- first_name: Eliot
  full_name: Quataert, Eliot
  last_name: Quataert
- first_name: Liz
  full_name: Holzknecht, Liz
  last_name: Holzknecht
citation:
  ama: Naoz S, Haiman Z, Quataert E, Holzknecht L. Triples as links between binary
    Black Hole mergers, their electromagnetic counterparts, and galactic Black Holes.
    <i>The Astrophysical Journal Letters</i>. 2025;992(1). doi:<a href="https://doi.org/10.3847/2041-8213/ae0a20">10.3847/2041-8213/ae0a20</a>
  apa: Naoz, S., Haiman, Z., Quataert, E., &#38; Holzknecht, L. (2025). Triples as
    links between binary Black Hole mergers, their electromagnetic counterparts, and
    galactic Black Holes. <i>The Astrophysical Journal Letters</i>. IOP Publishing.
    <a href="https://doi.org/10.3847/2041-8213/ae0a20">https://doi.org/10.3847/2041-8213/ae0a20</a>
  chicago: Naoz, Smadar, Zoltán Haiman, Eliot Quataert, and Liz Holzknecht. “Triples
    as Links between Binary Black Hole Mergers, Their Electromagnetic Counterparts,
    and Galactic Black Holes.” <i>The Astrophysical Journal Letters</i>. IOP Publishing,
    2025. <a href="https://doi.org/10.3847/2041-8213/ae0a20">https://doi.org/10.3847/2041-8213/ae0a20</a>.
  ieee: S. Naoz, Z. Haiman, E. Quataert, and L. Holzknecht, “Triples as links between
    binary Black Hole mergers, their electromagnetic counterparts, and galactic Black
    Holes,” <i>The Astrophysical Journal Letters</i>, vol. 992, no. 1. IOP Publishing,
    2025.
  ista: Naoz S, Haiman Z, Quataert E, Holzknecht L. 2025. Triples as links between
    binary Black Hole mergers, their electromagnetic counterparts, and galactic Black
    Holes. The Astrophysical Journal Letters. 992(1), L12.
  mla: Naoz, Smadar, et al. “Triples as Links between Binary Black Hole Mergers, Their
    Electromagnetic Counterparts, and Galactic Black Holes.” <i>The Astrophysical
    Journal Letters</i>, vol. 992, no. 1, L12, IOP Publishing, 2025, doi:<a href="https://doi.org/10.3847/2041-8213/ae0a20">10.3847/2041-8213/ae0a20</a>.
  short: S. Naoz, Z. Haiman, E. Quataert, L. Holzknecht, The Astrophysical Journal
    Letters 992 (2025).
date_created: 2025-10-19T22:01:31Z
date_published: 2025-10-10T00:00:00Z
date_updated: 2026-02-16T12:44:56Z
day: '10'
ddc:
- '520'
department:
- _id: ZoHa
doi: 10.3847/2041-8213/ae0a20
external_id:
  arxiv:
  - '2508.13270'
  isi:
  - '001589455900001'
file:
- access_level: open_access
  checksum: cb81d666f6d7638a5bcf45653d25bcb3
  content_type: application/pdf
  creator: dernst
  date_created: 2025-10-23T09:09:30Z
  date_updated: 2025-10-23T09:09:30Z
  file_id: '20520'
  file_name: 2025_AstrophysicalJour_Naoz.pdf
  file_size: 8787316
  relation: main_file
  success: 1
file_date_updated: 2025-10-23T09:09:30Z
has_accepted_license: '1'
intvolume: '       992'
isi: 1
issue: '1'
language:
- iso: eng
month: '10'
oa: 1
oa_version: Published Version
publication: The Astrophysical Journal Letters
publication_identifier:
  eissn:
  - 2041-8213
  issn:
  - 2041-8205
publication_status: published
publisher: IOP Publishing
quality_controlled: '1'
scopus_import: '1'
status: public
title: Triples as links between binary Black Hole mergers, their electromagnetic counterparts,
  and galactic 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: 992
year: '2025'
...
---
OA_place: repository
OA_type: green
_id: '20651'
abstract:
- lang: eng
  text: "The origin of merging binary black holes detected through gravitational waves
    remains a fundamental question in astrophysics. While stellar evolution imposes
    an upper mass limit of ∼50⁢\U0001D440⊙ for black holes, some observed mergers—most
    notably GW190521—involve significantly more massive components, suggesting alternative
    formation channels. Here we investigate the maximum masses attainable by black
    hole mergers within active galactic nucleus (AGN) disks. Using a comprehensive
    semianalytic model incorporating 27 binary and environmental parameters, we explore
    the role of AGN disk conditions in shaping the upper end of the black hole mass
    spectrum. We find that an AGN disk lifetime is the dominant factor, with high-mass
    mergers (≳200⁢\U0001D440⊙) only possible if disks persist for ≳40  Myr. The joint
    electromagnetic observation of an AGN-assisted merger could therefore lead to
    a direct measurement of the age of an AGN disk."
acknowledgement: The authors are thankful for Yang Yang and Yue Yu for valuable discussions
  and assistance with the programming process. H. T. was supported by the National
  Key R&D Program of China (Grant No. 2021YFC2203002). Z. H. is grateful for support
  from NASA under Grants No. 80NSSC22K0822 and No. 80NSSC24K0440. I. B. acknowledges
  support from the National Science Foundation under Grant No. PHY-2309024.
article_number: '063034'
article_processing_charge: No
article_type: original
arxiv: 1
author:
- first_name: Ling Qin
  full_name: Xue, Ling Qin
  last_name: Xue
- 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: Imre
  full_name: Bartos, Imre
  last_name: Bartos
citation:
  ama: Xue LQ, Tagawa H, Haiman Z, Bartos I. What determines the maximum mass of AGN-assisted
    black hole mergers? <i>Physical Review D</i>. 2025;112(6). doi:<a href="https://doi.org/10.1103/5m1n-qh9v">10.1103/5m1n-qh9v</a>
  apa: Xue, L. Q., Tagawa, H., Haiman, Z., &#38; Bartos, I. (2025). What determines
    the maximum mass of AGN-assisted black hole mergers? <i>Physical Review D</i>.
    American Physical Society. <a href="https://doi.org/10.1103/5m1n-qh9v">https://doi.org/10.1103/5m1n-qh9v</a>
  chicago: Xue, Ling Qin, Hiromichi Tagawa, Zoltán Haiman, and Imre Bartos. “What
    Determines the Maximum Mass of AGN-Assisted Black Hole Mergers?” <i>Physical Review
    D</i>. American Physical Society, 2025. <a href="https://doi.org/10.1103/5m1n-qh9v">https://doi.org/10.1103/5m1n-qh9v</a>.
  ieee: L. Q. Xue, H. Tagawa, Z. Haiman, and I. Bartos, “What determines the maximum
    mass of AGN-assisted black hole mergers?,” <i>Physical Review D</i>, vol. 112,
    no. 6. American Physical Society, 2025.
  ista: Xue LQ, Tagawa H, Haiman Z, Bartos I. 2025. What determines the maximum mass
    of AGN-assisted black hole mergers? Physical Review D. 112(6), 063034.
  mla: Xue, Ling Qin, et al. “What Determines the Maximum Mass of AGN-Assisted Black
    Hole Mergers?” <i>Physical Review D</i>, vol. 112, no. 6, 063034, American Physical
    Society, 2025, doi:<a href="https://doi.org/10.1103/5m1n-qh9v">10.1103/5m1n-qh9v</a>.
  short: L.Q. Xue, H. Tagawa, Z. Haiman, I. Bartos, Physical Review D 112 (2025).
date_created: 2025-11-16T23:01:24Z
date_published: 2025-09-18T00:00:00Z
date_updated: 2025-12-01T15:29:42Z
day: '18'
department:
- _id: ZoHa
doi: 10.1103/5m1n-qh9v
external_id:
  arxiv:
  - '2504.19570'
  isi:
  - '001583255800010'
intvolume: '       112'
isi: 1
issue: '6'
language:
- iso: eng
main_file_link:
- open_access: '1'
  url: https://doi.org/10.48550/arXiv.2504.19570
month: '09'
oa: 1
oa_version: Preprint
publication: Physical Review D
publication_identifier:
  eissn:
  - 2470-0029
  issn:
  - 2470-0010
publication_status: published
publisher: American Physical Society
quality_controlled: '1'
scopus_import: '1'
status: public
title: What determines the maximum mass of AGN-assisted black hole mergers?
type: journal_article
user_id: 2DF688A6-F248-11E8-B48F-1D18A9856A87
volume: 112
year: '2025'
...
---
OA_place: publisher
OA_type: diamond
PlanS_conform: '1'
_id: '20686'
abstract:
- lang: eng
  text: Emission from two massive black holes (MBHs) bound in a close binary is expected
    to be modulated by different processes, such as the Doppler boost due to the orbital
    motion, accretion rate variability generated by the interaction with a circumbinary
    disc, and binary gravitational self-lensing. When the binary is compact enough,
    the two black holes are thought to be surrounded by a common broad-line region
    that reprocesses the impinging periodically varying ionising flux, creating broad
    emission lines with variable line shapes. Therefore, the study of broad emission
    line variability through multi-epoch spectroscopic campaigns is of paramount importance
    for the unambiguous identification of a binary. In this work, we study the response
    of a disc-like broad-line region to the Doppler-boosted ionising flux emitted
    by sub-milliparsec MBH binaries on a circular orbit and compare it with the response
    of a broad-line region illuminated by a single MBH with a periodically but isotropically
    varying intrinsic luminosity. We show that in the binary case, the time lags of
    the blue and red wings of the broad emission lines, arising from diametrically
    opposite sides of the circumbinary disc, are out of phase by half of the binary’s
    orbital period, as they each respond to the periodic ‘lighthouse’ modulation from
    the binary’s continuum emission. This asymmetric time lag represents a new binary
    signature that cannot be mimicked by a single MBH.
acknowledgement: MD acknowledge funding from MIUR under the grant PRIN 2017-MB8AEZ,
  and financial support from ICSC – Centro Nazionale di Ricerca in High Performance
  Computing, Big Data and Quantum Computing, funded by European Union – NextGenerationEU.
  This study is supported by the Italian Ministry for Research and University (MUR)
  under Grant ‘Progetto Dipartimenti di Eccellenza 2023-2027’ (BiCoQ). FR acknowledges
  the support from the Next Generation EU funds within the National Recovery and Resilience
  Plan (PNRR), Mission 4 – Education and Research, Component 2 – From Research to
  Business (M4C2), Investment Line 3.1 – Strengthening and creation of Research Infrastructures,
  Project IR0000012 – CTA+ – Cherenkov Telescope Array Plus. DJD acknowledges support
  from the Danish Independent Research Fund through Sapere Aude Starting Grant No.
  121587 ZH acknowledges support from NSF grant AST-2006176 and NASA grants 80NSSC22K0822
  and 80NSSC24K0440.
article_number: A165
article_processing_charge: No
article_type: original
arxiv: 1
author:
- first_name: Lorenzo
  full_name: Bertassi, Lorenzo
  last_name: Bertassi
- first_name: Erika
  full_name: Sottocorno, Erika
  last_name: Sottocorno
- first_name: Fabio
  full_name: Rigamonti, Fabio
  last_name: Rigamonti
- first_name: Daniel
  full_name: D’Orazio, Daniel
  last_name: D’Orazio
- first_name: Michael
  full_name: Eracleous, Michael
  last_name: Eracleous
- first_name: Zoltán
  full_name: Haiman, Zoltán
  id: 7c006e8c-cc0d-11ee-8322-cb904ef76f36
  last_name: Haiman
  orcid: 0000-0003-3633-5403
- first_name: Massimo
  full_name: Dotti, Massimo
  last_name: Dotti
citation:
  ama: Bertassi L, Sottocorno E, Rigamonti F, et al. Testing compact massive black
    hole binary candidates through multi-epoch spectroscopy. <i>Astronomy &#38; Astrophysics</i>.
    2025;702. doi:<a href="https://doi.org/10.1051/0004-6361/202554574">10.1051/0004-6361/202554574</a>
  apa: Bertassi, L., Sottocorno, E., Rigamonti, F., D’Orazio, D., Eracleous, M., Haiman,
    Z., &#38; Dotti, M. (2025). Testing compact massive black hole binary candidates
    through multi-epoch spectroscopy. <i>Astronomy &#38; Astrophysics</i>. EDP Sciences.
    <a href="https://doi.org/10.1051/0004-6361/202554574">https://doi.org/10.1051/0004-6361/202554574</a>
  chicago: Bertassi, Lorenzo, Erika Sottocorno, Fabio Rigamonti, Daniel D’Orazio,
    Michael Eracleous, Zoltán Haiman, and Massimo Dotti. “Testing Compact Massive
    Black Hole Binary Candidates through Multi-Epoch Spectroscopy.” <i>Astronomy &#38;
    Astrophysics</i>. EDP Sciences, 2025. <a href="https://doi.org/10.1051/0004-6361/202554574">https://doi.org/10.1051/0004-6361/202554574</a>.
  ieee: L. Bertassi <i>et al.</i>, “Testing compact massive black hole binary candidates
    through multi-epoch spectroscopy,” <i>Astronomy &#38; Astrophysics</i>, vol. 702.
    EDP Sciences, 2025.
  ista: Bertassi L, Sottocorno E, Rigamonti F, D’Orazio D, Eracleous M, Haiman Z,
    Dotti M. 2025. Testing compact massive black hole binary candidates through multi-epoch
    spectroscopy. Astronomy &#38; Astrophysics. 702, A165.
  mla: Bertassi, Lorenzo, et al. “Testing Compact Massive Black Hole Binary Candidates
    through Multi-Epoch Spectroscopy.” <i>Astronomy &#38; Astrophysics</i>, vol. 702,
    A165, EDP Sciences, 2025, doi:<a href="https://doi.org/10.1051/0004-6361/202554574">10.1051/0004-6361/202554574</a>.
  short: L. Bertassi, E. Sottocorno, F. Rigamonti, D. D’Orazio, M. Eracleous, Z. Haiman,
    M. Dotti, Astronomy &#38; Astrophysics 702 (2025).
date_created: 2025-11-24T14:23:22Z
date_published: 2025-10-20T00:00:00Z
date_updated: 2025-12-01T15:31:55Z
day: '20'
ddc:
- '520'
department:
- _id: ZoHa
doi: 10.1051/0004-6361/202554574
external_id:
  arxiv:
  - '2504.06349'
  isi:
  - '001597841900015'
file:
- access_level: open_access
  checksum: dbaf156cb6684bf5c3f5fb76fc890d5a
  content_type: application/pdf
  creator: dernst
  date_created: 2025-11-25T12:56:18Z
  date_updated: 2025-11-25T12:56:18Z
  file_id: '20693'
  file_name: 2025_AstronomyAstrophysics_Bertassi.pdf
  file_size: 2035081
  relation: main_file
  success: 1
file_date_updated: 2025-11-25T12:56:18Z
has_accepted_license: '1'
intvolume: '       702'
isi: 1
language:
- iso: eng
month: '10'
oa: 1
oa_version: Published Version
publication: Astronomy & Astrophysics
publication_identifier:
  eissn:
  - 1432-0746
  issn:
  - 0004-6361
publication_status: published
publisher: EDP Sciences
quality_controlled: '1'
scopus_import: '1'
status: public
title: Testing compact massive black hole binary candidates through multi-epoch 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: 702
year: '2025'
...
---
OA_place: repository
OA_type: green
_id: '19497'
abstract:
- lang: eng
  text: The stochastic gravitational wave (GW) background recently discovered by several
    pulsar timing array experiments is consistent with arising from a population of
    coalescing super-massive black hole binaries. The amplitude of the background
    is somewhat higher than expected in most previous population models or from the
    local mass density observations. Such binaries are expected to be produced in
    galaxy mergers, which are also thought to trigger bright quasar activity. Under
    the assumptions that (i) a fraction fbin∼1 of all quasars are associated with
    mergers, (ii) the typical quasar lifetime is tQ∼108 yr, and (iii) adopting Eddington
    ratios fEdd∼0.25 for the luminosity of quasars, we compute the GW background associated
    directly with the empirically measured quasar luminosity function. This approach
    bypasses the need to model the cosmological evolution of black holes or galaxy
    mergers from simulations or semi-analytical models. We find the amplitude matching
    the value measured by NANOGrav. Our results are consistent with most quasars being
    associated with black hole binaries and being the sources of the GW background,
    and imply a joint constraint on tQ, fEdd and the typical mass ratio q≡M2/M1. The
    signal in this case would be dominated by relatively distant ∼109M⊙ sources at
    z≈2−3, at the peak of quasar activity. Similarly to other models, our results
    remain in tension with the local super-massive black hole mass density.
acknowledgement: We thank Chengcheng Xin and Girish Kulkarni for useful discussions.
  ZH gratefully acknowledges the hospitality of Eötvös University during an extended
  sabbatical visit, where this work began. ZH acknowledges support from NSF Grant
  AST-2006176 and NASA Grants 80NSSC22K0822 and 80NSSC24K0440. ZF acknowledges support
  from the Hungarian National Research, Development and Innovation Office (NKFIH)
  through the Institutional Excellence Program No. TKP2021-NKTA-64.
article_number: '075007'
article_processing_charge: No
article_type: original
arxiv: 1
author:
- first_name: Ágnes
  full_name: Kis-Tóth, Ágnes
  last_name: Kis-Tóth
- first_name: Zoltán
  full_name: Haiman, Zoltán
  id: 7c006e8c-cc0d-11ee-8322-cb904ef76f36
  last_name: Haiman
  orcid: 0000-0003-3633-5403
- first_name: Zsolt
  full_name: Frei, Zsolt
  last_name: Frei
citation:
  ama: Kis-Tóth Á, Haiman Z, Frei Z. Can quasars, triggered by mergers, account for
    NANOGrav’s stochastic gravitational wave background? <i>Classical and Quantum
    Gravity</i>. 2025;42(7). doi:<a href="https://doi.org/10.1088/1361-6382/adbda6">10.1088/1361-6382/adbda6</a>
  apa: Kis-Tóth, Á., Haiman, Z., &#38; Frei, Z. (2025). Can quasars, triggered by
    mergers, account for NANOGrav’s stochastic gravitational wave background? <i>Classical
    and Quantum Gravity</i>. IOP Publishing. <a href="https://doi.org/10.1088/1361-6382/adbda6">https://doi.org/10.1088/1361-6382/adbda6</a>
  chicago: Kis-Tóth, Ágnes, Zoltán Haiman, and Zsolt Frei. “Can Quasars, Triggered
    by Mergers, Account for NANOGrav’s Stochastic Gravitational Wave Background?”
    <i>Classical and Quantum Gravity</i>. IOP Publishing, 2025. <a href="https://doi.org/10.1088/1361-6382/adbda6">https://doi.org/10.1088/1361-6382/adbda6</a>.
  ieee: Á. Kis-Tóth, Z. Haiman, and Z. Frei, “Can quasars, triggered by mergers, account
    for NANOGrav’s stochastic gravitational wave background?,” <i>Classical and Quantum
    Gravity</i>, vol. 42, no. 7. IOP Publishing, 2025.
  ista: Kis-Tóth Á, Haiman Z, Frei Z. 2025. Can quasars, triggered by mergers, account
    for NANOGrav’s stochastic gravitational wave background? Classical and Quantum
    Gravity. 42(7), 075007.
  mla: Kis-Tóth, Ágnes, et al. “Can Quasars, Triggered by Mergers, Account for NANOGrav’s
    Stochastic Gravitational Wave Background?” <i>Classical and Quantum Gravity</i>,
    vol. 42, no. 7, 075007, IOP Publishing, 2025, doi:<a href="https://doi.org/10.1088/1361-6382/adbda6">10.1088/1361-6382/adbda6</a>.
  short: Á. Kis-Tóth, Z. Haiman, Z. Frei, Classical and Quantum Gravity 42 (2025).
date_created: 2025-04-06T22:01:32Z
date_published: 2025-04-04T00:00:00Z
date_updated: 2025-09-30T11:30:11Z
day: '04'
department:
- _id: ZoHa
doi: 10.1088/1361-6382/adbda6
external_id:
  arxiv:
  - '2412.12726'
  isi:
  - '001448904700001'
intvolume: '        42'
isi: 1
issue: '7'
language:
- iso: eng
main_file_link:
- open_access: '1'
  url: https://doi.org/10.48550/arXiv.2412.12726
month: '04'
oa: 1
oa_version: Preprint
publication: Classical and Quantum Gravity
publication_identifier:
  eissn:
  - 1361-6382
  issn:
  - 0264-9381
publication_status: published
publisher: IOP Publishing
quality_controlled: '1'
scopus_import: '1'
status: public
title: Can quasars, triggered by mergers, account for NANOGrav’s stochastic gravitational
  wave background?
type: journal_article
user_id: 317138e5-6ab7-11ef-aa6d-ffef3953e345
volume: 42
year: '2025'
...
---
DOAJ_listed: '1'
OA_place: publisher
OA_type: gold
_id: '19638'
abstract:
- lang: eng
  text: The James Webb Space Telescope has revealed low-luminosity active galactic
    nuclei at redshifts of z ≳ 4–7, many of which host accreting massive black holes
    (BHs) with BH-to-galaxy mass (MBH/M⋆) ratios exceeding the local values by more
    than an order of magnitude. The origin of these overmassive BHs remains unclear
    but requires potential contributions from heavy seeds and/or episodes of super-Eddington
    accretion. We present a growth model coupled with dark matter halo assembly to
    explore the evolution of the MBH/M⋆ ratio under different seeding and feedback
    scenarios. Given the gas inflow rates in protogalaxies, BHs grow episodically
    at moderate super-Eddington rates, and the mass ratio increases early on, despite
    significant mass loss through feedback. Regardless of seeding mechanisms, the
    mass ratio converges to a universal value ∼0.1–0.3, set by the balance between
    gas feeding and star formation efficiency in the nucleus. This behavior defines
    an attractor in the MBH–M⋆ diagram, where overmassive BHs grow more slowly than
    their hosts, while undermassive seeds experience rapid growth before aligning
    with the attractor. We derive an analytical expression for the universal mass
    ratio, linking it to feedback strength and halo growth. The convergence of evolutionary
    tracks erases seeding information from the mass ratio by z ∼ 4–6. Detecting BHs
    with ∼105−6 M⊙ at higher redshifts that deviate from the convergence trend would
    provide key diagnostics of their birth conditions.
acknowledgement: We thank the anonymous referee for a careful reading of our manuscript
  and for comments that helped improve this Letter. This work is supported by the
  Japan Society for the Promotion of Science (JSPS) KAKENHI grant No. 24KF0130. We
  acknowledge support from the National Natural Science Foundation of China (12073003,
  12003003, 11721303, 11991052, 11950410493), and the China Manned Space Project (CMS-CSST-2021-A04
  and CMS-CSST-2021-A06). L.C.H. is supported by the National Science Foundation of
  China (12233001), the National Key R&D Program of China (2022YFF0503401). Z.H. acknowledges
  support by US NSF grant AST-2006176 and by NASA grant 80NSSC22K0822. Some of the
  numerical calculation and analysis were performed with the Cray XC50 at the Center
  for Computational Astrophysics (CfCA) of the National Astronomical Observatory of
  Japan and with the High-performance Computing Platform of Peking University.
article_number: L37
article_processing_charge: Yes
article_type: letter_note
arxiv: 1
author:
- first_name: Haojie
  full_name: Hu, Haojie
  last_name: Hu
- first_name: Kohei
  full_name: Inayoshi, Kohei
  last_name: Inayoshi
- first_name: Zoltán
  full_name: Haiman, Zoltán
  id: 7c006e8c-cc0d-11ee-8322-cb904ef76f36
  last_name: Haiman
  orcid: 0000-0003-3633-5403
- first_name: Luis C.
  full_name: Ho, Luis C.
  last_name: Ho
- first_name: Ken
  full_name: Ohsuga, Ken
  last_name: Ohsuga
citation:
  ama: Hu H, Inayoshi K, Haiman Z, Ho LC, Ohsuga K. The convergence of heavy and light
    seeds to overmassive black holes at cosmic dawn. <i>The Astrophysical Journal
    Letters</i>. 2025;983(2). doi:<a href="https://doi.org/10.3847/2041-8213/adc680">10.3847/2041-8213/adc680</a>
  apa: Hu, H., Inayoshi, K., Haiman, Z., Ho, L. C., &#38; Ohsuga, K. (2025). The convergence
    of heavy and light seeds to overmassive black holes at cosmic dawn. <i>The Astrophysical
    Journal Letters</i>. IOP Publishing. <a href="https://doi.org/10.3847/2041-8213/adc680">https://doi.org/10.3847/2041-8213/adc680</a>
  chicago: Hu, Haojie, Kohei Inayoshi, Zoltán Haiman, Luis C. Ho, and Ken Ohsuga.
    “The Convergence of Heavy and Light Seeds to Overmassive Black Holes at Cosmic
    Dawn.” <i>The Astrophysical Journal Letters</i>. IOP Publishing, 2025. <a href="https://doi.org/10.3847/2041-8213/adc680">https://doi.org/10.3847/2041-8213/adc680</a>.
  ieee: H. Hu, K. Inayoshi, Z. Haiman, L. C. Ho, and K. Ohsuga, “The convergence of
    heavy and light seeds to overmassive black holes at cosmic dawn,” <i>The Astrophysical
    Journal Letters</i>, vol. 983, no. 2. IOP Publishing, 2025.
  ista: Hu H, Inayoshi K, Haiman Z, Ho LC, Ohsuga K. 2025. The convergence of heavy
    and light seeds to overmassive black holes at cosmic dawn. The Astrophysical Journal
    Letters. 983(2), L37.
  mla: Hu, Haojie, et al. “The Convergence of Heavy and Light Seeds to Overmassive
    Black Holes at Cosmic Dawn.” <i>The Astrophysical Journal Letters</i>, vol. 983,
    no. 2, L37, IOP Publishing, 2025, doi:<a href="https://doi.org/10.3847/2041-8213/adc680">10.3847/2041-8213/adc680</a>.
  short: H. Hu, K. Inayoshi, Z. Haiman, L.C. Ho, K. Ohsuga, The Astrophysical Journal
    Letters 983 (2025).
date_created: 2025-05-04T22:02:31Z
date_published: 2025-04-20T00:00:00Z
date_updated: 2026-02-16T12:44:04Z
day: '20'
ddc:
- '520'
department:
- _id: ZoHa
doi: 10.3847/2041-8213/adc680
external_id:
  arxiv:
  - '2503.03870'
  isi:
  - '001467616800001'
file:
- access_level: open_access
  checksum: 1a4fbeeb12e9022873e86c72d230a5ec
  content_type: application/pdf
  creator: dernst
  date_created: 2025-05-05T11:30:34Z
  date_updated: 2025-05-05T11:30:34Z
  file_id: '19655'
  file_name: 2025_AstrophysicalJourLetters_Hu.pdf
  file_size: 3334014
  relation: main_file
  success: 1
file_date_updated: 2025-05-05T11:30:34Z
has_accepted_license: '1'
intvolume: '       983'
isi: 1
issue: '2'
language:
- iso: eng
month: '04'
oa: 1
oa_version: Published Version
publication: The Astrophysical Journal Letters
publication_identifier:
  eissn:
  - 2041-8213
  issn:
  - 2041-8205
publication_status: published
publisher: IOP Publishing
quality_controlled: '1'
scopus_import: '1'
status: public
title: The convergence of heavy and light seeds to overmassive black holes at cosmic
  dawn
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: 983
year: '2025'
...
---
DOAJ_listed: '1'
OA_place: publisher
OA_type: gold
_id: '19699'
abstract:
- lang: eng
  text: We demonstrate that gas disks around binary systems might deliver gas to the
    binary components only when the circumbinary disk is relatively warm. We present
    new grid-based hydrodynamics simulations, performed with the binary on the grid
    and a locally isothermal equation of state, in which the binary is seen to functionally
    "stop accreting" if the orbital Mach number in the disk exceeds a threshold value
    of about 40. Above this threshold, the disk continues to extract angular momentum
    from the binary orbit, but it delivers very little mass to the black holes and
    instead piles up mass in a ring surrounding the binary. This ring will eventually
    become viscously relaxed and deliver mass to the binary at the large-scale inflow
    rate. However, we show that the timescale for such relaxation can far exceed the
    implied binary lifetime. We demonstrate that the ability of a binary–disk system
    to equilibrate is dependent on the efficiency at which accretion streams deposit
    mass onto the binary, which, in turn is highly sensitive to the thermodynamic
    conditions of the inner disk. If disks around massive black hole binaries do operate
    in such nonaccreting regimes, it suggests these systems may be dimmer than their
    single black hole counterparts but could exhibit dramatic rebrightening after
    the black holes inspiral and merge. This dimming begins in the UV/optical and
    could completely choke high-energy emission, such that these systems would likely
    be intrinsically X-ray weak with reddened continua, potentially resembling the
    spectra of "little red dots" recently identified in JWST observations.
acknowledgement: C.T. sincerely thanks Daniel J. D'Orazio for useful and illuminating
  discussions. This work was supported by the European Union's Horizon 2023 research
  and innovation program under Marie Sklodowska-Curie grant agreement No. 101148364,
  by Sapere Aude Starting grant No. 121587 through the Danish Independent Research
  Fund, by the LISA Preparatory Science Program (LPS) through NASA grant 80NSSC24K0440,
  and by NASA Astrophysics Theory Program (ATP) grant 80NSSC22K0822. Computation time
  for this work was supported through the NYU IT High Performance Computing resources
  as well as the Tycho supercomputer hosted at the SCIENCE HPC center at the University
  of Copenhagen.
article_number: '144'
article_processing_charge: Yes
article_type: original
arxiv: 1
author:
- first_name: Christopher
  full_name: Tiede, Christopher
  last_name: Tiede
- first_name: Jonathan
  full_name: Zrake, Jonathan
  last_name: Zrake
- first_name: Andrew
  full_name: Macfadyen, Andrew
  last_name: Macfadyen
- first_name: Zoltán
  full_name: Haiman, Zoltán
  id: 7c006e8c-cc0d-11ee-8322-cb904ef76f36
  last_name: Haiman
  orcid: 0000-0003-3633-5403
citation:
  ama: Tiede C, Zrake J, Macfadyen A, Haiman Z. Suppressed accretion onto massive
    black hole binaries surrounded by thin disks. <i>The Astrophysical Journal</i>.
    2025;984(2). doi:<a href="https://doi.org/10.3847/1538-4357/adc727">10.3847/1538-4357/adc727</a>
  apa: Tiede, C., Zrake, J., Macfadyen, A., &#38; Haiman, Z. (2025). Suppressed accretion
    onto massive black hole binaries surrounded by thin disks. <i>The Astrophysical
    Journal</i>. IOP Publishing. <a href="https://doi.org/10.3847/1538-4357/adc727">https://doi.org/10.3847/1538-4357/adc727</a>
  chicago: Tiede, Christopher, Jonathan Zrake, Andrew Macfadyen, and Zoltán Haiman.
    “Suppressed Accretion onto Massive Black Hole Binaries Surrounded by Thin Disks.”
    <i>The Astrophysical Journal</i>. IOP Publishing, 2025. <a href="https://doi.org/10.3847/1538-4357/adc727">https://doi.org/10.3847/1538-4357/adc727</a>.
  ieee: C. Tiede, J. Zrake, A. Macfadyen, and Z. Haiman, “Suppressed accretion onto
    massive black hole binaries surrounded by thin disks,” <i>The Astrophysical Journal</i>,
    vol. 984, no. 2. IOP Publishing, 2025.
  ista: Tiede C, Zrake J, Macfadyen A, Haiman Z. 2025. Suppressed accretion onto massive
    black hole binaries surrounded by thin disks. The Astrophysical Journal. 984(2),
    144.
  mla: Tiede, Christopher, et al. “Suppressed Accretion onto Massive Black Hole Binaries
    Surrounded by Thin Disks.” <i>The Astrophysical Journal</i>, vol. 984, no. 2,
    144, IOP Publishing, 2025, doi:<a href="https://doi.org/10.3847/1538-4357/adc727">10.3847/1538-4357/adc727</a>.
  short: C. Tiede, J. Zrake, A. Macfadyen, Z. Haiman, The Astrophysical Journal 984
    (2025).
date_created: 2025-05-18T22:02:49Z
date_published: 2025-05-09T00:00:00Z
date_updated: 2026-02-16T12:42:56Z
day: '09'
ddc:
- '520'
department:
- _id: ZoHa
doi: 10.3847/1538-4357/adc727
external_id:
  arxiv:
  - '2410.03830'
  isi:
  - '001483889000001'
file:
- access_level: open_access
  checksum: 0d4c57ee944599c0789f3db467c5ca2f
  content_type: application/pdf
  creator: dernst
  date_created: 2025-05-19T07:20:30Z
  date_updated: 2025-05-19T07:20:30Z
  file_id: '19708'
  file_name: 2025_AstrophysicalJour_Tiede.pdf
  file_size: 1058601
  relation: main_file
  success: 1
file_date_updated: 2025-05-19T07:20:30Z
has_accepted_license: '1'
intvolume: '       984'
isi: 1
issue: '2'
language:
- iso: eng
month: '05'
oa: 1
oa_version: Published Version
publication: The Astrophysical Journal
publication_identifier:
  eissn:
  - 1538-4357
  issn:
  - 0004-637X
publication_status: published
publisher: IOP Publishing
quality_controlled: '1'
scopus_import: '1'
status: public
title: Suppressed accretion onto massive black hole binaries surrounded by thin disks
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: 984
year: '2025'
...
---
DOAJ_listed: '1'
OA_place: publisher
OA_type: gold
PlanS_conform: '1'
_id: '21121'
abstract:
- lang: eng
  text: The relation between the masses of supermassive black holes (SMBHs) and their
    host galaxies encodes information on their mode of growth, especially at the earliest
    epochs. The James Webb Space Telescope (JWST) has opened such investigations by
    detecting the host galaxies of active galactic nuclei (AGN) and more luminous
    quasars within the first billion years of the Universe (z ≳ 6). Here, we evaluate
    the relation between the mass of SMBHs and the total stellar mass of their host
    galaxies using a sample of nine quasars at 6.18 ≤ z ≤ 6.4 from the Subaru High-z
    Exploration of Low-luminosity Quasars survey with NIRCam and NIRSpec observations.
    We find that the observed location of these quasars in the SMBH–galaxy mass plane
    (logMBH/M 8–9; logM*/M 9.5–11) is consistent with a nonevolving intrinsic mass
    relation with dispersion (0.80 +0.23 -0.28 dex) higher than the local value (∼0.3–0.4
    dex) of their more massive descendants. Our analysis is based on a forward model
    of systematics and includes a consideration of the impact of selection effects
    and measurement uncertainties with an assumption on the slope of the mass relation.
    While degeneracies between parameters persist, the best-fit solution has a reasonable
    AGN fraction (2.3%) of galaxies at z ∼ 6 with an actively growing UV-unobscured
    black hole. In particular, models with a substantially higher normalisation in
    MBH would require an unrealistically low intrinsic dispersion (∼0.22 dex). Consequently,
    our results predict a large population of AGN at lower black hole masses, as are
    now just starting to be discovered in focused efforts with JWST.
acknowledgement: 'This work is based on observations made with the NASA/ESA/CSA James
  Webb Space Telescope. 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 programs GO #1967 and GO #3859.
  The specific observations analyzed can be accessed via DOI: 10.17909/719q-cn32.
  Support for these programs 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. This work was supported by
  World Premier International Research Center Initiative (WPI), MEXT, Japan. This
  work used computing resources at Kavli IPMU. J.S. is supported by JSPS KAKENHI (JP22H01262).
  M.O. is supported by the Japan Society for the Promotion of Science (JSPS) KAKENHI
  grant No. 24K22894. Y.M. was supported by the Japan Society for the Promotion of
  Science (JSPS) KAKENHI grant No. 21H04494. M.V. gratefully acknowledges financial
  support from the Independent Research Fund Denmark via grant numbers DFF 8021-00130
  and 3103-00146 and from the Carlsberg Foundation via grant CF23-0417. S.E.I.B. is
  supported by the Deutsche Forschungsgemeinschaft (DFG) under Emmy Noether grant
  number BO 5771/1-1. K.I. acknowledges support from the National Natural Science
  Foundation of China (12073003, 11721303, 11991052). K.I. acknowledges support under
  the grant PID2022-136827NB-C44 provided by MCIN/AEI/10.13039/501100011033 / FEDER,
  UE. A.L. acknowledges support from PRIN MUR 2022— Project “2022935STW.” J.T.S. is
  supported by the Deutsche Forschungsgemeinschaft (DFG, German Research Foundation)—project
  number 518006966. F.W. acknowledges support from NSF award AST-2513040. M.H. acknowledges
  support from the FNS under the SNSF starting grant 218032. B.T. acknowledges support
  from the European Research Council (ERC) under the European Union’s Horizon 2020
  research and innovation program (grant agreement number 950533) and from the Excellence
  Cluster ORIGINS, which is funded by the Deutsche Forschungsgemeinschaft (DFG, German
  Research Foundation) under Germany’s Excellence Strategy—EXC 2094—390783311.'
article_number: L67
article_processing_charge: Yes
article_type: original
arxiv: 1
author:
- first_name: John David
  full_name: Silverman, John David
  last_name: Silverman
- first_name: Junyao
  full_name: Li, Junyao
  last_name: Li
- first_name: Xuheng
  full_name: Ding, Xuheng
  last_name: Ding
- first_name: Masafusa
  full_name: Onoue, Masafusa
  last_name: Onoue
- first_name: Michael A.
  full_name: Strauss, Michael A.
  last_name: Strauss
- first_name: Yoshiki
  full_name: Matsuoka, Yoshiki
  last_name: Matsuoka
- first_name: Takuma
  full_name: Izumi, Takuma
  last_name: Izumi
- first_name: Knud
  full_name: Jahnke, Knud
  last_name: Jahnke
- first_name: Tommaso
  full_name: Treu, Tommaso
  last_name: Treu
- first_name: Marta
  full_name: Volonteri, Marta
  last_name: Volonteri
- first_name: Camryn L.
  full_name: Phillips, Camryn L.
  last_name: Phillips
- first_name: Irham T.
  full_name: Andika, Irham T.
  last_name: Andika
- first_name: Kentaro
  full_name: Aoki, Kentaro
  last_name: Aoki
- first_name: Junya
  full_name: Arita, Junya
  last_name: Arita
- first_name: Shunsuke
  full_name: Baba, Shunsuke
  last_name: Baba
- first_name: Sarah E. I.
  full_name: Bosman, Sarah E. I.
  last_name: Bosman
- first_name: Anna-Christina
  full_name: Eilers, Anna-Christina
  last_name: Eilers
- first_name: Xiaohui
  full_name: Fan, Xiaohui
  last_name: Fan
- first_name: Seiji
  full_name: Fujimoto, Seiji
  last_name: Fujimoto
- first_name: Melanie
  full_name: Habouzit, Melanie
  last_name: Habouzit
- first_name: Zoltán
  full_name: Haiman, Zoltán
  id: 7c006e8c-cc0d-11ee-8322-cb904ef76f36
  last_name: Haiman
  orcid: 0000-0003-3633-5403
- first_name: Masatoshi
  full_name: Imanishi, Masatoshi
  last_name: Imanishi
- first_name: Kohei
  full_name: Inayoshi, Kohei
  last_name: Inayoshi
- first_name: Kazushi
  full_name: Iwasawa, Kazushi
  last_name: Iwasawa
- first_name: Nobunari
  full_name: Kashikawa, Nobunari
  last_name: Kashikawa
- first_name: Toshihiro
  full_name: Kawaguchi, Toshihiro
  last_name: Kawaguchi
- first_name: Chien-Hsiu
  full_name: Lee, Chien-Hsiu
  last_name: Lee
- first_name: Alessandro
  full_name: Lupi, Alessandro
  last_name: Lupi
- first_name: Tohru
  full_name: Nagao, Tohru
  last_name: Nagao
- first_name: Jan-Torge
  full_name: Schindler, Jan-Torge
  last_name: Schindler
- first_name: Malte
  full_name: Schramm, Malte
  last_name: Schramm
- first_name: Kazuhiro
  full_name: Shimasaku, Kazuhiro
  last_name: Shimasaku
- first_name: Yoshiki
  full_name: Toba, Yoshiki
  last_name: Toba
- first_name: Benny
  full_name: Trakhtenbrot, Benny
  last_name: Trakhtenbrot
- first_name: Hideki
  full_name: Umehata, Hideki
  last_name: Umehata
- first_name: Marianne
  full_name: Vestergaard, Marianne
  last_name: Vestergaard
- first_name: Fabian
  full_name: Walter, Fabian
  last_name: Walter
- first_name: Feige
  full_name: Wang, Feige
  last_name: Wang
- first_name: Jinyi
  full_name: Yang, Jinyi
  last_name: Yang
citation:
  ama: Silverman JD, Li J, Ding X, et al. SHELLQs–JWST perspective on the intrinsic
    mass relation between supermassive black holes and their host galaxies at z &#62;
    6. <i>The Astrophysical Journal Letters</i>. 2025;995(2). doi:<a href="https://doi.org/10.3847/2041-8213/ae279c">10.3847/2041-8213/ae279c</a>
  apa: Silverman, J. D., Li, J., Ding, X., Onoue, M., Strauss, M. A., Matsuoka, Y.,
    … Yang, J. (2025). SHELLQs–JWST perspective on the intrinsic mass relation between
    supermassive black holes and their host galaxies at z &#62; 6. <i>The Astrophysical
    Journal Letters</i>. IOP Publishing. <a href="https://doi.org/10.3847/2041-8213/ae279c">https://doi.org/10.3847/2041-8213/ae279c</a>
  chicago: Silverman, John David, Junyao Li, Xuheng Ding, Masafusa Onoue, Michael
    A. Strauss, Yoshiki Matsuoka, Takuma Izumi, et al. “SHELLQs–JWST Perspective on
    the Intrinsic Mass Relation between Supermassive Black Holes and Their Host Galaxies
    at z &#62; 6.” <i>The Astrophysical Journal Letters</i>. IOP Publishing, 2025.
    <a href="https://doi.org/10.3847/2041-8213/ae279c">https://doi.org/10.3847/2041-8213/ae279c</a>.
  ieee: J. D. Silverman <i>et al.</i>, “SHELLQs–JWST perspective on the intrinsic
    mass relation between supermassive black holes and their host galaxies at z &#62;
    6,” <i>The Astrophysical Journal Letters</i>, vol. 995, no. 2. IOP Publishing,
    2025.
  ista: Silverman JD, Li J, Ding X, Onoue M, Strauss MA, Matsuoka Y, Izumi T, Jahnke
    K, Treu T, Volonteri M, Phillips CL, Andika IT, Aoki K, Arita J, Baba S, Bosman
    SEI, Eilers A-C, Fan X, Fujimoto S, Habouzit M, Haiman Z, Imanishi M, Inayoshi
    K, Iwasawa K, Kashikawa N, Kawaguchi T, Lee C-H, Lupi A, Nagao T, Schindler J-T,
    Schramm M, Shimasaku K, Toba Y, Trakhtenbrot B, Umehata H, Vestergaard M, Walter
    F, Wang F, Yang J. 2025. SHELLQs–JWST perspective on the intrinsic mass relation
    between supermassive black holes and their host galaxies at z &#62; 6. The Astrophysical
    Journal Letters. 995(2), L67.
  mla: Silverman, John David, et al. “SHELLQs–JWST Perspective on the Intrinsic Mass
    Relation between Supermassive Black Holes and Their Host Galaxies at z &#62; 6.”
    <i>The Astrophysical Journal Letters</i>, vol. 995, no. 2, L67, IOP Publishing,
    2025, doi:<a href="https://doi.org/10.3847/2041-8213/ae279c">10.3847/2041-8213/ae279c</a>.
  short: J.D. Silverman, J. Li, X. Ding, M. Onoue, M.A. Strauss, Y. Matsuoka, T. Izumi,
    K. Jahnke, T. Treu, M. Volonteri, C.L. Phillips, I.T. Andika, K. Aoki, J. Arita,
    S. Baba, S.E.I. Bosman, A.-C. Eilers, X. Fan, S. Fujimoto, M. Habouzit, Z. Haiman,
    M. Imanishi, K. Inayoshi, K. Iwasawa, N. Kashikawa, T. Kawaguchi, C.-H. Lee, A.
    Lupi, T. Nagao, J.-T. Schindler, M. Schramm, K. Shimasaku, Y. Toba, B. Trakhtenbrot,
    H. Umehata, M. Vestergaard, F. Walter, F. Wang, J. Yang, The Astrophysical Journal
    Letters 995 (2025).
date_created: 2026-01-31T09:27:53Z
date_published: 2025-12-17T00:00:00Z
date_updated: 2026-02-10T07:02:39Z
day: '17'
ddc:
- '520'
department:
- _id: ZoHa
doi: 10.3847/2041-8213/ae279c
external_id:
  arxiv:
  - '2507.23066'
file:
- access_level: open_access
  checksum: e38c0c444be9c1507eec28c62ce04cbc
  content_type: application/pdf
  creator: dernst
  date_created: 2026-02-10T06:56:37Z
  date_updated: 2026-02-10T06:56:37Z
  file_id: '21202'
  file_name: 2025_AstrophysicalJounalLetters_Silvermann.pdf
  file_size: 997137
  relation: main_file
  success: 1
file_date_updated: 2026-02-10T06:56:37Z
has_accepted_license: '1'
intvolume: '       995'
issue: '2'
language:
- iso: eng
month: '12'
oa: 1
oa_version: Published Version
publication: The Astrophysical Journal Letters
publication_identifier:
  eissn:
  - 2041-8213
  issn:
  - 2041-8205
publication_status: published
publisher: IOP Publishing
quality_controlled: '1'
status: public
title: SHELLQs–JWST perspective on the intrinsic mass relation between supermassive
  black holes and their host galaxies at z > 6
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: 995
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. <i>Monthly Notices of the Royal Astronomical Society</i>. 2025;543(3):2670-2685.
    doi:<a href="https://doi.org/10.1093/mnras/staf1583">10.1093/mnras/staf1583</a>
  apa: Krauth, L. M., Davelaar, J., Haiman, Z., Westernacher-Schneider, J. R., Zrake,
    J., &#38; MacFadyen, A. (2025). Thermal X-ray signatures in late-stage unequal-mass
    massive black hole binary mergers. <i>Monthly Notices of the Royal Astronomical
    Society</i>. Oxford University Press. <a href="https://doi.org/10.1093/mnras/staf1583">https://doi.org/10.1093/mnras/staf1583</a>
  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.” <i>Monthly Notices of the Royal
    Astronomical Society</i>. Oxford University Press, 2025. <a href="https://doi.org/10.1093/mnras/staf1583">https://doi.org/10.1093/mnras/staf1583</a>.
  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,” <i>Monthly Notices of the Royal Astronomical Society</i>,
    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.” <i>Monthly Notices of the Royal Astronomical
    Society</i>, vol. 543, no. 3, Oxford University Press, 2025, pp. 2670–85, doi:<a
    href="https://doi.org/10.1093/mnras/staf1583">10.1093/mnras/staf1583</a>.
  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
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: '21123'
abstract:
- lang: eng
  text: We present a study of the late-time interaction between supermassive black
    hole binaries and retrograde circumbinary disks during the period of gravitational
    wave-driven inspiral. While mergers in prograde disks have received extensive
    study, retrograde disks offer distinct dynamics that could promote mergers and
    produce unique observational signatures. Through 2D numerical hydrodynamical simulations,
    we explore the process of binary-disk decoupling, where the binary’s orbital decay
    rate is faster than the disk’s viscous response rate. We find the point of decoupling
    to be comparable in prograde and retrograde disks, suggesting that any associated
    electromagnetic (EM) signatures will be produced at comparable times preceding
    the merger. However, we find smaller central cavities for retrograde disks, likely
    leading to higher-frequency EM emissions and shorter postmerger rebrightening
    timescales compared to their prograde counterparts. Retrograde disks form intrabinary
    bridges, which are prone to instabilities when the viscosity is low. These instabilities
    manifest as quasiperiodic flares in the accretion rate, which may produce distinctive
    EM signatures for retrograde disks.
acknowledgement: 'D.J.D., C.T., and D.O.N. acknowledge support from the Danish Independent
  Research Fund through Sapere Aude Starting grant No. 121587, led by D.J.D. We are
  grateful to the anonymous referee for the insightful comments and suggestions for
  improving the manuscript. This work was also supported in part by the LISA Preparatory
  Science Program (LPS) through NASA grant 80NSSC24K0440, by NASA Astrophysics Theory
  Program (ATP) grant 80NSSC22K0822, and by the European Union’s Horizon research
  and innovation program under Marie Sklodowska-Curie grant agreement No. 101148364.
  This work made use of the following software packages: Sailfish (J. Zrake & A. MacFadyen
  2024), numpy (C. R. Harris et al. 2020), Python (G. Van Rossum & F. L. Drake 2009),
  and scipy (P. Virtanen et al. 2020; R. Gommers et al. 2024). Software citation information
  aggregated using The Software Citation Station (T. Wagg & F. S. Broekgaarden 2024;
  T. Wagg et al. 2024). The Tycho supercomputer hosted at the SCIENCE HPC center at
  the University of Copenhagen was used in this work.'
article_number: '206'
article_processing_charge: Yes
article_type: original
arxiv: 1
author:
- first_name: David
  full_name: O’Neill, David
  last_name: O’Neill
- first_name: Christopher
  full_name: Tiede, Christopher
  last_name: Tiede
- first_name: Daniel J.
  full_name: D’Orazio, Daniel J.
  last_name: D’Orazio
- first_name: Zoltán
  full_name: Haiman, Zoltán
  id: 7c006e8c-cc0d-11ee-8322-cb904ef76f36
  last_name: Haiman
  orcid: 0000-0003-3633-5403
- first_name: Andrew
  full_name: MacFadyen, Andrew
  last_name: MacFadyen
citation:
  ama: O’Neill D, Tiede C, D’Orazio DJ, Haiman Z, MacFadyen A. Gravitational wave
    decoupling in retrograde circumbinary disks. <i>The Astrophysical Journal</i>.
    2025;993(2). doi:<a href="https://doi.org/10.3847/1538-4357/ae0ca8">10.3847/1538-4357/ae0ca8</a>
  apa: O’Neill, D., Tiede, C., D’Orazio, D. J., Haiman, Z., &#38; MacFadyen, A. (2025).
    Gravitational wave decoupling in retrograde circumbinary disks. <i>The Astrophysical
    Journal</i>. IOP Publishing. <a href="https://doi.org/10.3847/1538-4357/ae0ca8">https://doi.org/10.3847/1538-4357/ae0ca8</a>
  chicago: O’Neill, David, Christopher Tiede, Daniel J. D’Orazio, Zoltán Haiman, and
    Andrew MacFadyen. “Gravitational Wave Decoupling in Retrograde Circumbinary Disks.”
    <i>The Astrophysical Journal</i>. IOP Publishing, 2025. <a href="https://doi.org/10.3847/1538-4357/ae0ca8">https://doi.org/10.3847/1538-4357/ae0ca8</a>.
  ieee: D. O’Neill, C. Tiede, D. J. D’Orazio, Z. Haiman, and A. MacFadyen, “Gravitational
    wave decoupling in retrograde circumbinary disks,” <i>The Astrophysical Journal</i>,
    vol. 993, no. 2. IOP Publishing, 2025.
  ista: O’Neill D, Tiede C, D’Orazio DJ, Haiman Z, MacFadyen A. 2025. Gravitational
    wave decoupling in retrograde circumbinary disks. The Astrophysical Journal. 993(2),
    206.
  mla: O’Neill, David, et al. “Gravitational Wave Decoupling in Retrograde Circumbinary
    Disks.” <i>The Astrophysical Journal</i>, vol. 993, no. 2, 206, IOP Publishing,
    2025, doi:<a href="https://doi.org/10.3847/1538-4357/ae0ca8">10.3847/1538-4357/ae0ca8</a>.
  short: D. O’Neill, C. Tiede, D.J. D’Orazio, Z. Haiman, A. MacFadyen, The Astrophysical
    Journal 993 (2025).
date_created: 2026-01-31T09:28:50Z
date_published: 2025-11-05T00:00:00Z
date_updated: 2026-02-10T07:22:28Z
day: '05'
ddc:
- '520'
department:
- _id: ZoHa
doi: 10.3847/1538-4357/ae0ca8
external_id:
  arxiv:
  - '2501.11679'
file:
- access_level: open_access
  checksum: 65d0a3af314b5706407ad1b57a4ea89d
  content_type: application/pdf
  creator: dernst
  date_created: 2026-02-10T07:19:52Z
  date_updated: 2026-02-10T07:19:52Z
  file_id: '21205'
  file_name: 2025_AstrophysicalJournal_ONeill.pdf
  file_size: 8071909
  relation: main_file
  success: 1
file_date_updated: 2026-02-10T07:19:52Z
has_accepted_license: '1'
intvolume: '       993'
issue: '2'
language:
- iso: eng
month: '11'
oa: 1
oa_version: Published Version
publication: The Astrophysical Journal
publication_identifier:
  eissn:
  - 1538-4357
  issn:
  - 0004-637X
publication_status: published
publisher: IOP Publishing
quality_controlled: '1'
status: public
title: Gravitational wave decoupling in retrograde circumbinary disks
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: 993
year: '2025'
...
---
DOAJ_listed: '1'
OA_place: publisher
OA_type: gold
PlanS_conform: '1'
_id: '21124'
abstract:
- lang: eng
  text: The advent of the James Webb Space Telescope (JWST) has opened new horizons
    in the study of quasar host galaxies during the reionization epoch (z > 6). Building
    upon our previous initial measurements of stellar light from two quasar host galaxies
    at these redshifts, we now report the detection of the stellar light from the
    full Cycle 1 sample of 12 distant moderate-luminosity quasar (M1450 > −24 mag)
    host galaxies at z > 6 from the Hyper Suprime-Cam Subaru Strategic Program. Using
    JWST/NIRCam observations at 1.5 and 3.6 μm combined with 2D image decomposition
    analysis, we successfully detect the host galaxies in 11 of the 12 targets, underscoring
    the high detection rates achievable with moderate-luminosity quasars. Based on
    two-band photometry and spectral energy distribution fitting, we find that our
    host galaxies are massive, with log M*/M⊙ = 9.5–11.0. The effective radii range
    from 0.6 to 3.2 kpc, comparable to the sizes of inactive galaxies with similar
    masses at z ∼ 6 as measured with imaging from COSMOS-Web. Intriguingly, the two
    quasar hosts with post-starburst features, which reside at the high-mass end of
    our sample and exhibit relatively compact morphologies, have similar size and
    stellar mass surface densities to quiescent galaxies at z ∼ 4–5. These findings
    suggest that the so-called galaxy compaction scenario is already in place at the
    reionization epoch, in which gas inflows during starburst phases drive centrally
    concentrated star formation followed by rapid quenching, bridging the structural
    transition of massive galaxies from relatively extended star-forming disks to
    compact quiescent systems.
acknowledgement: "We sincerely thank Xiaohui Fan and Shenli Tang for their valuable
  discussions and insightful suggestions.\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 programs GO #1967,
  GO #3859, and GO #1727. Support for these programs 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.
  This work was supported by the World Premier International Research Center Initiative
  (WPI), MEXT, Japan. This work used computing resources at Kavli IPMU. All the JWST
  data used in this paper can be found in MAST: doi:10.17909/hqaf-an74.\r\n\r\nSupport
  for this work was provided by NASA through grant JWST-GO-01727 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. X.D. is supported
  by Wuhan University's Double First-Class funding. M.O. is supported by the Japan
  Society for the Promotion of Science (JSPS) KAKENHI grant No. G24K22894. Y.M. is
  supported by the Japan Society for the Promotion of Science (JSPS) KAKENHI grant
  No. 21H04494. S.E.I.B. is supported by the Deutsche Forschungsgemeinschaft (DFG)
  under Emmy Noether grant No. B.O. 5771/1-1. J.S. is supported by JSPS KAKENHI (JP22H01262)
  and the World Premier International Research Center Initiative (WPI), MEXT, Japan.
  K.I. acknowledges support from the National Natural Science Foundation of China
  (12073003, 11721303, 11991052). A.L. acknowledges support from PRIN MUR 2022—Project
  “2022935STW” J.T.S. is supported by the Deutsche Forschungsgemeinschaft (DFG, German
  Research Foundation)—Project No. 518006966. M.V. gratefully acknowledges financial
  support from the Independent Research Fund Denmark via grant Nos. DFF 8021-00130
  and 3103-00146. K.I. acknowledges support under grant PID2022-136827NB-C44 provided
  by MCIN/AEI/10.13039/501100011033/FEDER, UE. F.W. acknowledges support from NSF
  award AST-2513040."
article_number: '91'
article_processing_charge: Yes
article_type: original
arxiv: 1
author:
- first_name: Xuheng
  full_name: Ding, Xuheng
  last_name: Ding
- first_name: Masafusa
  full_name: Onoue, Masafusa
  last_name: Onoue
- first_name: John D.
  full_name: Silverman, John D.
  last_name: Silverman
- first_name: Yoshiki
  full_name: Matsuoka, Yoshiki
  last_name: Matsuoka
- first_name: Takuma
  full_name: Izumi, Takuma
  last_name: Izumi
- first_name: Michael A.
  full_name: Strauss, Michael A.
  last_name: Strauss
- first_name: Lilan
  full_name: Yang, Lilan
  last_name: Yang
- first_name: Knud
  full_name: Jahnke, Knud
  last_name: Jahnke
- first_name: Camryn L.
  full_name: Phillips, Camryn L.
  last_name: Phillips
- first_name: Tommaso
  full_name: Treu, Tommaso
  last_name: Treu
- first_name: Irham T.
  full_name: Andika, Irham T.
  last_name: Andika
- first_name: Kentaro
  full_name: Aoki, Kentaro
  last_name: Aoki
- first_name: Junya
  full_name: Arita, Junya
  last_name: Arita
- first_name: Shunsuke
  full_name: Baba, Shunsuke
  last_name: Baba
- first_name: Sarah E. I.
  full_name: Bosman, Sarah E. I.
  last_name: Bosman
- first_name: Anna-Christina
  full_name: Eilers, Anna-Christina
  last_name: Eilers
- first_name: Seiji
  full_name: Fujimoto, Seiji
  last_name: Fujimoto
- first_name: Zoltán
  full_name: Haiman, Zoltán
  id: 7c006e8c-cc0d-11ee-8322-cb904ef76f36
  last_name: Haiman
  orcid: 0000-0003-3633-5403
- first_name: Masatoshi
  full_name: Imanishi, Masatoshi
  last_name: Imanishi
- first_name: Kohei
  full_name: Inayoshi, Kohei
  last_name: Inayoshi
- first_name: Kazushi
  full_name: Iwasawa, Kazushi
  last_name: Iwasawa
- first_name: Jeyhan
  full_name: Kartaltepe, Jeyhan
  last_name: Kartaltepe
- first_name: Nobunari
  full_name: Kashikawa, Nobunari
  last_name: Kashikawa
- first_name: Toshihiro
  full_name: Kawaguchi, Toshihiro
  last_name: Kawaguchi
- first_name: Junyao
  full_name: Li, Junyao
  last_name: Li
- first_name: Chien-Hsiu
  full_name: Lee, Chien-Hsiu
  last_name: Lee
- first_name: Alessandro
  full_name: Lupi, Alessandro
  last_name: Lupi
- first_name: Jan-Torge
  full_name: Schindler, Jan-Torge
  last_name: Schindler
- first_name: Malte
  full_name: Schramm, Malte
  last_name: Schramm
- first_name: Kazuhiro
  full_name: Shimasaku, Kazuhiro
  last_name: Shimasaku
- first_name: Marko
  full_name: Shuntov, Marko
  last_name: Shuntov
- first_name: Takumi S.
  full_name: Tanaka, Takumi S.
  last_name: Tanaka
- first_name: Yoshiki
  full_name: Toba, Yoshiki
  last_name: Toba
- first_name: Benny
  full_name: Trakhtenbrot, Benny
  last_name: Trakhtenbrot
- first_name: Hideki
  full_name: Umehata, Hideki
  last_name: Umehata
- first_name: Marianne
  full_name: Vestergaard, Marianne
  last_name: Vestergaard
- first_name: Feige
  full_name: Wang, Feige
  last_name: Wang
- first_name: Jinyi
  full_name: Yang, Jinyi
  last_name: Yang
citation:
  ama: Ding X, Onoue M, Silverman JD, et al. SHELLQs-JWST unveils the host galaxies
    of 12 quasars at z &#62; 6. <i>The Astrophysical Journal</i>. 2025;993(1). doi:<a
    href="https://doi.org/10.3847/1538-4357/ae045b">10.3847/1538-4357/ae045b</a>
  apa: Ding, X., Onoue, M., Silverman, J. D., Matsuoka, Y., Izumi, T., Strauss, M.
    A., … Yang, J. (2025). SHELLQs-JWST unveils the host galaxies of 12 quasars at
    z &#62; 6. <i>The Astrophysical Journal</i>. IOP Publishing. <a href="https://doi.org/10.3847/1538-4357/ae045b">https://doi.org/10.3847/1538-4357/ae045b</a>
  chicago: Ding, Xuheng, Masafusa Onoue, John D. Silverman, Yoshiki Matsuoka, Takuma
    Izumi, Michael A. Strauss, Lilan Yang, et al. “SHELLQs-JWST Unveils the Host Galaxies
    of 12 Quasars at z &#62; 6.” <i>The Astrophysical Journal</i>. IOP Publishing,
    2025. <a href="https://doi.org/10.3847/1538-4357/ae045b">https://doi.org/10.3847/1538-4357/ae045b</a>.
  ieee: X. Ding <i>et al.</i>, “SHELLQs-JWST unveils the host galaxies of 12 quasars
    at z &#62; 6,” <i>The Astrophysical Journal</i>, vol. 993, no. 1. IOP Publishing,
    2025.
  ista: Ding X, Onoue M, Silverman JD, Matsuoka Y, Izumi T, Strauss MA, Yang L, Jahnke
    K, Phillips CL, Treu T, Andika IT, Aoki K, Arita J, Baba S, Bosman SEI, Eilers
    A-C, Fujimoto S, Haiman Z, Imanishi M, Inayoshi K, Iwasawa K, Kartaltepe J, Kashikawa
    N, Kawaguchi T, Li J, Lee C-H, Lupi A, Schindler J-T, Schramm M, Shimasaku K,
    Shuntov M, Tanaka TS, Toba Y, Trakhtenbrot B, Umehata H, Vestergaard M, Wang F,
    Yang J. 2025. SHELLQs-JWST unveils the host galaxies of 12 quasars at z &#62;
    6. The Astrophysical Journal. 993(1), 91.
  mla: Ding, Xuheng, et al. “SHELLQs-JWST Unveils the Host Galaxies of 12 Quasars
    at z &#62; 6.” <i>The Astrophysical Journal</i>, vol. 993, no. 1, 91, IOP Publishing,
    2025, doi:<a href="https://doi.org/10.3847/1538-4357/ae045b">10.3847/1538-4357/ae045b</a>.
  short: X. Ding, M. Onoue, J.D. Silverman, Y. Matsuoka, T. Izumi, M.A. Strauss, L.
    Yang, K. Jahnke, C.L. Phillips, T. Treu, I.T. Andika, K. Aoki, J. Arita, S. Baba,
    S.E.I. Bosman, A.-C. Eilers, S. Fujimoto, Z. Haiman, M. Imanishi, K. Inayoshi,
    K. Iwasawa, J. Kartaltepe, N. Kashikawa, T. Kawaguchi, J. Li, C.-H. Lee, A. Lupi,
    J.-T. Schindler, M. Schramm, K. Shimasaku, M. Shuntov, T.S. Tanaka, Y. Toba, B.
    Trakhtenbrot, H. Umehata, M. Vestergaard, F. Wang, J. Yang, The Astrophysical
    Journal 993 (2025).
date_created: 2026-01-31T09:29:11Z
date_published: 2025-10-28T00:00:00Z
date_updated: 2026-02-10T07:44:42Z
day: '28'
ddc:
- '520'
department:
- _id: ZoHa
doi: 10.3847/1538-4357/ae045b
external_id:
  arxiv:
  - '2505.03876'
file:
- access_level: open_access
  checksum: 36decd55832a270ce62086c1a279a254
  content_type: application/pdf
  creator: dernst
  date_created: 2026-02-10T07:42:21Z
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oa_version: Published Version
publication: The Astrophysical Journal
publication_identifier:
  eissn:
  - 1538-4357
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publication_status: published
publisher: IOP Publishing
quality_controlled: '1'
status: public
title: SHELLQs-JWST unveils the host galaxies of 12 quasars at z > 6
tmp:
  image: /images/cc_by.png
  legal_code_url: https://creativecommons.org/licenses/by/4.0/legalcode
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type: journal_article
user_id: 2DF688A6-F248-11E8-B48F-1D18A9856A87
volume: 993
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---
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_id: '21724'
abstract:
- lang: eng
  text: 'The next generation of weak-gravitational-lensing surveys has the potential
    to place stringent constraints on cosmological parameters. However, their analysis
    is limited by systematics such as the intrinsic alignments of galaxies, which
    alter weak-lensing convergence and can lead to biases in cosmological parameter
    estimations. For the first time, in this work, we investigate the impact of intrinsic
    alignments on non-Gaussian statistics of the weak-lensing field using galaxy shapes
    derived from the IllustrisTNG hydrodynamical simulation. We create two catalogs
    of ray-traced convergence maps: one that includes the measured intrinsic shape
    of each galaxy and another where all galaxies are randomly rotated to eliminate
    intrinsic alignments. We compare a range of weak-lensing statistics between the
    two catalogs, including the shear–shear correlation function, the map-level angular
    power spectrum, one-point, peak count, and minimum distribution functions, and
    Minkowski functionals. For each statistic, we assess the level of statistical
    distinguishability between catalogs for a set of future survey angular areas.
    Our results reveal strong small-scale correlation in the alignment of galaxies
    and statistically significant boosts in weak-lensing convergence in both positive
    and negative directions for high-significance peaks and minima, respectively.
    We note that our analysis is at a fixed number density of  ˜ 5 arcmin^-2, drawn
    from a single realization of initial conditions, and does not include observational
    uncertainties or supersample covariance contributions. Weak-lensing analyses utilizing
    non-Gaussian statistics must account for intrinsic alignments to avoid significantly
    compromised cosmological inferences.'
acknowledgement: We thank Fulvio Ferlito, Ana Maria Delgado, and Ken Osato for helpful
  conversations during this work. M.E.L. is supported by NSF grant DGE-2036197. Z.H.
  acknowledges financial support from NASA ATP grant 80NSSC24K1093. The Flatiron Institute
  is supported by the Simons Foundation.
article_number: '36'
article_processing_charge: Yes
article_type: original
arxiv: 1
author:
- first_name: Max E.
  full_name: Lee, Max E.
  last_name: Lee
- first_name: Zoltán
  full_name: Haiman, Zoltán
  id: 7c006e8c-cc0d-11ee-8322-cb904ef76f36
  last_name: Haiman
  orcid: 0000-0003-3633-5403
- first_name: Shivam
  full_name: Pandey, Shivam
  last_name: Pandey
- first_name: Shy
  full_name: Genel, Shy
  last_name: Genel
citation:
  ama: Lee ME, Haiman Z, Pandey S, Genel S. The effect of intrinsic alignments on
    weak-lensing statistics in hydrodynamical simulations. <i>The Astrophysical Journal</i>.
    2025;996(1). doi:<a href="https://doi.org/10.3847/1538-4357/ae1ca7">10.3847/1538-4357/ae1ca7</a>
  apa: Lee, M. E., Haiman, Z., Pandey, S., &#38; Genel, S. (2025). The effect of intrinsic
    alignments on weak-lensing statistics in hydrodynamical simulations. <i>The Astrophysical
    Journal</i>. IOP Publishing. <a href="https://doi.org/10.3847/1538-4357/ae1ca7">https://doi.org/10.3847/1538-4357/ae1ca7</a>
  chicago: Lee, Max E., Zoltán Haiman, Shivam Pandey, and Shy Genel. “The Effect of
    Intrinsic Alignments on Weak-Lensing Statistics in Hydrodynamical Simulations.”
    <i>The Astrophysical Journal</i>. IOP Publishing, 2025. <a href="https://doi.org/10.3847/1538-4357/ae1ca7">https://doi.org/10.3847/1538-4357/ae1ca7</a>.
  ieee: M. E. Lee, Z. Haiman, S. Pandey, and S. Genel, “The effect of intrinsic alignments
    on weak-lensing statistics in hydrodynamical simulations,” <i>The Astrophysical
    Journal</i>, vol. 996, no. 1. IOP Publishing, 2025.
  ista: Lee ME, Haiman Z, Pandey S, Genel S. 2025. The effect of intrinsic alignments
    on weak-lensing statistics in hydrodynamical simulations. The Astrophysical Journal.
    996(1), 36.
  mla: Lee, Max E., et al. “The Effect of Intrinsic Alignments on Weak-Lensing Statistics
    in Hydrodynamical Simulations.” <i>The Astrophysical Journal</i>, vol. 996, no.
    1, 36, IOP Publishing, 2025, doi:<a href="https://doi.org/10.3847/1538-4357/ae1ca7">10.3847/1538-4357/ae1ca7</a>.
  short: M.E. Lee, Z. Haiman, S. Pandey, S. Genel, The Astrophysical Journal 996 (2025).
date_created: 2026-04-12T22:01:52Z
date_published: 2025-12-23T00:00:00Z
date_updated: 2026-04-13T08:30:52Z
day: '23'
ddc:
- '520'
department:
- _id: ZoHa
doi: 10.3847/1538-4357/ae1ca7
external_id:
  arxiv:
  - '2504.12460'
file:
- access_level: open_access
  checksum: 0d8fa05617420230eac39944b36839e9
  content_type: application/pdf
  creator: dernst
  date_created: 2026-04-13T08:20:16Z
  date_updated: 2026-04-13T08:20:16Z
  file_id: '21732'
  file_name: 2025_AstrophysicalJournal_Lee.pdf
  file_size: 4122087
  relation: main_file
  success: 1
file_date_updated: 2026-04-13T08:20:16Z
has_accepted_license: '1'
intvolume: '       996'
issue: '1'
language:
- iso: eng
month: '12'
oa: 1
oa_version: Published Version
publication: The Astrophysical Journal
publication_identifier:
  eissn:
  - 1538-4357
  issn:
  - 0004-637X
publication_status: published
publisher: IOP Publishing
quality_controlled: '1'
scopus_import: '1'
status: public
title: The effect of intrinsic alignments on weak-lensing statistics in hydrodynamical
  simulations
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: 996
year: '2025'
...
