[{"publication_status":"published","extern":"1","scopus_import":"1","issue":"2","publication":"Monthly Notices of the Royal Astronomical Society","abstract":[{"text":"The bright quasar PG1302-102 has been identified as a candidate supermassive black hole binary from its near-sinusoidal optical variability. While the significance of its optical periodicity has been debated due to the stochastic variability of quasars, its multiwavelength variability in the ultraviolet (UV) and optical bands is consistent with relativistic Doppler boost caused by the orbital motion in a binary. However, this conclusion was based previously on sparse UV data that were not taken simultaneously with the optical data. Here, we report simultaneous follow-up observations of PG1302-102 with the Ultraviolet Optical Telescope on the Neil Gehrels Swift Observatory in six optical + UV bands. The additional nine Swift observations produce light curves roughly consistent with the trend under the Doppler boost hypothesis, which predicts that UV variability should track the optical, but with a ∼2.2 times higher amplitude. We perform a statistical analysis to quantitatively test this hypothesis. We find that the data are consistent with the Doppler boost hypothesis when we compare the the amplitudes in optical B-band and UV light curves. However, the ratio of UV to V-band variability is larger than expected and is consistent with the Doppler model, only if either the UV/optical spectral slopes vary, the stochastic variability makes a large contribution in the UV, or the sparse new optical data underestimate the true optical variability. We have evidence for the latter from comparison with the optical light curve from All-Sky Automated Survey for Supernovae. Additionally, the simultaneous analysis of all four bands strongly disfavours the Doppler boost model whenever Swift V band is involved. Additional, simultaneous optical + UV observations tracing out another cycle of the 5.2-yr proposed periodicity should lead to a definitive conclusion.","lang":"eng"}],"day":"10","oa_version":"Published Version","author":[{"full_name":"Xin, Chengcheng","first_name":"Chengcheng","last_name":"Xin"},{"last_name":"Charisi","full_name":"Charisi, Maria","first_name":"Maria"},{"id":"7c006e8c-cc0d-11ee-8322-cb904ef76f36","last_name":"Haiman","first_name":"Zoltán","full_name":"Haiman, Zoltán"},{"full_name":"Schiminovich, David","first_name":"David","last_name":"Schiminovich"},{"first_name":"Matthew J","last_name":"Graham","full_name":"Graham, Matthew J"},{"last_name":"Stern","full_name":"Stern, Daniel","first_name":"Daniel"},{"full_name":"D’Orazio, Daniel J","last_name":"D’Orazio","first_name":"Daniel J"}],"main_file_link":[{"open_access":"1","url":"https://doi.org/10.1093/mnras/staa1643"}],"title":"Testing the relativistic Doppler boost hypothesis for the binary candidate quasar PG1302-102 with multiband Swift data","doi":"10.1093/mnras/staa1643","publisher":"Oxford University Press","type":"journal_article","status":"public","date_updated":"2024-09-18T10:23:02Z","intvolume":" 496","article_type":"original","user_id":"317138e5-6ab7-11ef-aa6d-ffef3953e345","page":"1683-1696","_id":"17554","year":"2020","language":[{"iso":"eng"}],"publication_identifier":{"issn":["0035-8711","1365-2966"]},"quality_controlled":"1","date_created":"2024-09-05T10:22:00Z","article_processing_charge":"No","month":"06","volume":496,"oa":1,"citation":{"short":"C. Xin, M. Charisi, Z. Haiman, D. Schiminovich, M.J. Graham, D. Stern, D.J. D’Orazio, Monthly Notices of the Royal Astronomical Society 496 (2020) 1683–1696.","ista":"Xin C, Charisi M, Haiman Z, Schiminovich D, Graham MJ, Stern D, D’Orazio DJ. 2020. Testing the relativistic Doppler boost hypothesis for the binary candidate quasar PG1302-102 with multiband Swift data. Monthly Notices of the Royal Astronomical Society. 496(2), 1683–1696.","ieee":"C. Xin et al., “Testing the relativistic Doppler boost hypothesis for the binary candidate quasar PG1302-102 with multiband Swift data,” Monthly Notices of the Royal Astronomical Society, vol. 496, no. 2. Oxford University Press, pp. 1683–1696, 2020.","mla":"Xin, Chengcheng, et al. “Testing the Relativistic Doppler Boost Hypothesis for the Binary Candidate Quasar PG1302-102 with Multiband Swift Data.” Monthly Notices of the Royal Astronomical Society, vol. 496, no. 2, Oxford University Press, 2020, pp. 1683–96, doi:10.1093/mnras/staa1643.","apa":"Xin, C., Charisi, M., Haiman, Z., Schiminovich, D., Graham, M. J., Stern, D., & D’Orazio, D. J. (2020). Testing the relativistic Doppler boost hypothesis for the binary candidate quasar PG1302-102 with multiband Swift data. Monthly Notices of the Royal Astronomical Society. Oxford University Press. https://doi.org/10.1093/mnras/staa1643","chicago":"Xin, Chengcheng, Maria Charisi, Zoltán Haiman, David Schiminovich, Matthew J Graham, Daniel Stern, and Daniel J D’Orazio. “Testing the Relativistic Doppler Boost Hypothesis for the Binary Candidate Quasar PG1302-102 with Multiband Swift Data.” Monthly Notices of the Royal Astronomical Society. Oxford University Press, 2020. https://doi.org/10.1093/mnras/staa1643.","ama":"Xin C, Charisi M, Haiman Z, et al. Testing the relativistic Doppler boost hypothesis for the binary candidate quasar PG1302-102 with multiband Swift data. Monthly Notices of the Royal Astronomical Society. 2020;496(2):1683-1696. doi:10.1093/mnras/staa1643"},"date_published":"2020-06-10T00:00:00Z"},{"oa_version":"Preprint","issue":"1","publication":"Annual Review of Astronomy and Astrophysics","abstract":[{"lang":"eng","text":"The existence of ≈10^9 Msun supermassive black holes (SMBHs) within the first billion year of the universe has stimulated numerous ideas for the prompt formation and rapid growth of BHs in the early universe. Here we review ways in which the seeds of massive BHs may have first assembled, how they may have subsequently grown as massive as ≈10^9 Msun, and how multi-messenger observations could distinguish between different SMBH assembly scenarios. We conclude the following: (1) The ultra-rare ≈10^9 Msun SMBHs represent only the tip of the iceberg. Early BHs likely fill a continuum from stellar-mass (approx. 10 Msun) to the super-massive (≈10^9 Msun) regime, reflecting a range of initial masses and growth histories. (2) Stellar-mass BHs were likely left behind by the first generation of stars at redshifts as high as z=30, but their initial growth was typically stunted due to the shallow potential wells of their host galaxies. (3) Conditions in some larger, metal-poor galaxies soon became conducive to the rapid formation and growth of massive `seed' holes, via gas accretion and by mergers in dense stellar clusters. (4) BH masses depend on the environment (such as the number and properties of nearby radiation sources and the local baryonic streaming velocity), and on the metal enrichment and assembly history of the host galaxy. (5) Distinguishing between assembly mechanisms will be difficult, but a combination of observations by LISA (probing massive BH growth via mergers) and by deep multi-wavelength electromagnetic observations (probing growth via gas accretion) is particularly promising."}],"day":"30","publication_status":"published","extern":"1","scopus_import":"1","title":"The Assembly of the First Massive Black Holes","main_file_link":[{"url":" https://doi.org/10.48550/arXiv.1911.05791","open_access":"1"}],"external_id":{"arxiv":["1911.05791"]},"author":[{"full_name":"Inayoshi, Kohei","last_name":"Inayoshi","first_name":"Kohei"},{"first_name":"Eli","last_name":"Visbal","full_name":"Visbal, Eli"},{"full_name":"Haiman, Zoltán","first_name":"Zoltán","last_name":"Haiman","id":"7c006e8c-cc0d-11ee-8322-cb904ef76f36"}],"_id":"17564","page":"27-97","year":"2020","article_type":"original","user_id":"317138e5-6ab7-11ef-aa6d-ffef3953e345","date_updated":"2024-09-18T13:06:37Z","type":"journal_article","status":"public","publisher":"Annual Reviews","intvolume":" 58","doi":"10.1146/annurev-astro-120419-014455","date_published":"2020-03-30T00:00:00Z","oa":1,"volume":58,"article_processing_charge":"No","month":"03","citation":{"ama":"Inayoshi K, Visbal E, Haiman Z. The Assembly of the First Massive Black Holes. Annual Review of Astronomy and Astrophysics. 2020;58(1):27-97. doi:10.1146/annurev-astro-120419-014455","chicago":"Inayoshi, Kohei, Eli Visbal, and Zoltán Haiman. “The Assembly of the First Massive Black Holes.” Annual Review of Astronomy and Astrophysics. Annual Reviews, 2020. https://doi.org/10.1146/annurev-astro-120419-014455.","mla":"Inayoshi, Kohei, et al. “The Assembly of the First Massive Black Holes.” Annual Review of Astronomy and Astrophysics, vol. 58, no. 1, Annual Reviews, 2020, pp. 27–97, doi:10.1146/annurev-astro-120419-014455.","ieee":"K. Inayoshi, E. Visbal, and Z. Haiman, “The Assembly of the First Massive Black Holes,” Annual Review of Astronomy and Astrophysics, vol. 58, no. 1. Annual Reviews, pp. 27–97, 2020.","apa":"Inayoshi, K., Visbal, E., & Haiman, Z. (2020). The Assembly of the First Massive Black Holes. Annual Review of Astronomy and Astrophysics. Annual Reviews. https://doi.org/10.1146/annurev-astro-120419-014455","short":"K. Inayoshi, E. Visbal, Z. Haiman, Annual Review of Astronomy and Astrophysics 58 (2020) 27–97.","ista":"Inayoshi K, Visbal E, Haiman Z. 2020. The Assembly of the First Massive Black Holes. Annual Review of Astronomy and Astrophysics. 58(1), 27–97."},"arxiv":1,"date_created":"2024-09-05T12:04:49Z","language":[{"iso":"eng"}],"quality_controlled":"1","publication_identifier":{"issn":["0066-4146","1545-4282"]}},{"author":[{"full_name":"Regan, John A.","first_name":"John A.","last_name":"Regan"},{"id":"7c006e8c-cc0d-11ee-8322-cb904ef76f36","full_name":"Haiman, Zoltán","first_name":"Zoltán","last_name":"Haiman"},{"first_name":"John H.","last_name":"Wise","full_name":"Wise, John H."},{"full_name":"O'Shea, Brian W.","last_name":"O'Shea","first_name":"Brian W."},{"last_name":"Norman","full_name":"Norman, Michael L.","first_name":"Michael L."}],"title":"Massive star formation in metal-enriched haloes at high redshift","main_file_link":[{"url":"https://doi.org/10.21105/astro.2006.14625","open_access":"1"}],"scopus_import":"1","extern":"1","publication_status":"published","oa_version":"Published Version","day":"24","abstract":[{"text":"The formation of supermassive stars has generally been studied under the assumption of rapid accretion of pristine metal-free gas. Recently it was found, however, that gas enriched to metallicities up to Z∼10−3 Z⊙ can also facilitate supermassive star formation, as long as the total mass infall rate onto the protostar remains sufficiently high. We extend the analysis further by examining how the abundance of supermassive star candidate haloes would be affected if all haloes with super-critical infall rates, regardless of metallicity were included. We investigate this scenario by identifying all atomic cooling haloes in the Renaissance simulations with central mass infall rates exceeding a fixed threshold. We find that among these haloes with central mass infall rates above 0.1 M⊙ yr−1 approximately two-thirds of these haloes have metallicities of Z>10−3 Z⊙. If metal mixing within these haloes is inefficient early in their assembly and pockets of metal-poor gas can remain then the number of haloes hosting supermassive stars can be increased by at least a factor of four. Additionally the centres of these high infall-rate haloes provide ideal environments in which to grow pre-existing black holes. Further research into the (supermassive) star formation dynamics of rapidly collapsing haloes, with inhomogeneous metal distributions, is required to gain more insight into both supermassive star formation in early galaxies as well as early black hole growth.","lang":"eng"}],"issue":"1","publication":"The Open Journal of Astrophysics","date_created":"2024-09-05T12:07:42Z","publication_identifier":{"issn":["2565-6120"]},"quality_controlled":"1","language":[{"iso":"eng"}],"date_published":"2020-08-24T00:00:00Z","citation":{"ista":"Regan JA, Haiman Z, Wise JH, O’Shea BW, Norman ML. 2020. Massive star formation in metal-enriched haloes at high redshift. The Open Journal of Astrophysics. 3(1).","short":"J.A. Regan, Z. Haiman, J.H. Wise, B.W. O’Shea, M.L. Norman, The Open Journal of Astrophysics 3 (2020).","ama":"Regan JA, Haiman Z, Wise JH, O’Shea BW, Norman ML. Massive star formation in metal-enriched haloes at high redshift. The Open Journal of Astrophysics. 2020;3(1). doi:10.21105/astro.2006.14625","chicago":"Regan, John A., Zoltán Haiman, John H. Wise, Brian W. O’Shea, and Michael L. Norman. “Massive Star Formation in Metal-Enriched Haloes at High Redshift.” The Open Journal of Astrophysics. Maynooth University, 2020. https://doi.org/10.21105/astro.2006.14625.","apa":"Regan, J. A., Haiman, Z., Wise, J. H., O’Shea, B. W., & Norman, M. L. (2020). Massive star formation in metal-enriched haloes at high redshift. The Open Journal of Astrophysics. Maynooth University. https://doi.org/10.21105/astro.2006.14625","ieee":"J. A. Regan, Z. Haiman, J. H. Wise, B. W. O’Shea, and M. L. Norman, “Massive star formation in metal-enriched haloes at high redshift,” The Open Journal of Astrophysics, vol. 3, no. 1. Maynooth University, 2020.","mla":"Regan, John A., et al. “Massive Star Formation in Metal-Enriched Haloes at High Redshift.” The Open Journal of Astrophysics, vol. 3, no. 1, Maynooth University, 2020, doi:10.21105/astro.2006.14625."},"month":"08","volume":3,"article_processing_charge":"No","oa":1,"intvolume":" 3","type":"journal_article","publisher":"Maynooth University","status":"public","date_updated":"2024-09-18T13:17:51Z","doi":"10.21105/astro.2006.14625","year":"2020","_id":"17566","user_id":"317138e5-6ab7-11ef-aa6d-ffef3953e345","article_type":"original"},{"author":[{"first_name":"Hiromichi","full_name":"Tagawa, Hiromichi","last_name":"Tagawa"},{"full_name":"Haiman, Zoltán","last_name":"Haiman","id":"7c006e8c-cc0d-11ee-8322-cb904ef76f36","first_name":"Zoltán"},{"first_name":"Bence","full_name":"Kocsis, Bence","last_name":"Kocsis"}],"main_file_link":[{"open_access":"1","url":"https://doi.org/10.3847/1538-4357/ab7922"}],"title":"Making a supermassive star by stellar bombardment","article_number":"36","scopus_import":"1","extern":"1","publication_status":"published","abstract":[{"text":"Approximately 200 supermassive black holes (SMBHs) have been discovered within the first ∼gigayear after the Big Bang. One pathway for the formation of SMBHs is through the collapse of supermassive stars (SMSs). A possible obstacle to this scenario is that the collapsing gas fragments and forms a cluster of main-sequence stars. Here, we raise the possibility that stellar collisions may be sufficiently frequent and energetic to inhibit the contraction of the massive protostar, avoiding strong UV radiation driven outflows, and allowing it to continue growing into an SMS. We investigate this scenario with semianalytic models incorporating star formation; gas accretion; dynamical friction from stars and gas; stellar collisions; and gas ejection. We find that when the collapsing gas fragments at a density of ≲3 × 1010 cm−3, the central protostar contracts due to infrequent stellar mergers, and in turn photoevaporates the remaining collapsing gas, resulting in the formation of a ≲104 M⊙ object. On the other hand, when the collapsing gas fragments at higher densities (expected for a metal-poor cloud with Z ≲ 10−5 Z⊙ with suppressed H2 abundance) the central protostar avoids contraction and keeps growing via frequent stellar mergers, reaching masses as high as ∼105–106 M⊙. We conclude that frequent stellar mergers represent a possible pathway to form massive BHs in the early universe.","lang":"eng"}],"day":"24","issue":"1","publication":"The Astrophysical Journal","oa_version":"Published Version","quality_controlled":"1","publication_identifier":{"issn":["0004-637X","1538-4357"]},"language":[{"iso":"eng"}],"date_created":"2024-09-05T12:22:41Z","citation":{"chicago":"Tagawa, Hiromichi, Zoltán Haiman, and Bence Kocsis. “Making a Supermassive Star by Stellar Bombardment.” The Astrophysical Journal. American Astronomical Society, 2020. https://doi.org/10.3847/1538-4357/ab7922.","ama":"Tagawa H, Haiman Z, Kocsis B. Making a supermassive star by stellar bombardment. The Astrophysical Journal. 2020;892(1). doi:10.3847/1538-4357/ab7922","ieee":"H. Tagawa, Z. Haiman, and B. Kocsis, “Making a supermassive star by stellar bombardment,” The Astrophysical Journal, vol. 892, no. 1. American Astronomical Society, 2020.","mla":"Tagawa, Hiromichi, et al. “Making a Supermassive Star by Stellar Bombardment.” The Astrophysical Journal, vol. 892, no. 1, 36, American Astronomical Society, 2020, doi:10.3847/1538-4357/ab7922.","apa":"Tagawa, H., Haiman, Z., & Kocsis, B. (2020). Making a supermassive star by stellar bombardment. The Astrophysical Journal. American Astronomical Society. https://doi.org/10.3847/1538-4357/ab7922","short":"H. Tagawa, Z. Haiman, B. Kocsis, The Astrophysical Journal 892 (2020).","ista":"Tagawa H, Haiman Z, Kocsis B. 2020. Making a supermassive star by stellar bombardment. The Astrophysical Journal. 892(1), 36."},"volume":892,"article_processing_charge":"No","month":"03","oa":1,"date_published":"2020-03-24T00:00:00Z","doi":"10.3847/1538-4357/ab7922","intvolume":" 892","publisher":"American Astronomical Society","status":"public","type":"journal_article","date_updated":"2024-09-19T11:21:17Z","user_id":"317138e5-6ab7-11ef-aa6d-ffef3953e345","article_type":"original","year":"2020","_id":"17579"},{"extern":"1","publication_status":"published","scopus_import":"1","article_number":"148","oa_version":"Published Version","issue":"2","publication":"The Astrophysical Journal","abstract":[{"lang":"eng","text":"We present analysis of Chandra X-ray observations of seven quasars that were identified as candidate subparsec binary supermassive black hole (SMBH) systems in the Catalina Real-Time Transient Survey based on the apparent periodicity in their optical light curves. Simulations predict that close-separation accreting SMBH binaries will have different X-ray spectra than single accreting SMBHs, including harder or softer X-ray spectra, ripple-like profiles in the Fe K-α line, and distinct peaks in the spectrum due to the separation of the accretion disk into a circumbinary disk and mini disks around each SMBH. We obtained Chandra observations to test these models and assess whether these quasars could contain binary SMBHs. We instead find that the quasar spectra are all well fit by simple absorbed power-law models, with the rest-frame 2–10 keV photon indices, Γ, and the X-ray-to-optical power slopes, αOX, indistinguishable from those of the larger quasar population. This may indicate that these seven quasars are not truly subparsec binary SMBH systems, or it may simply reflect that our sample size was too small to robustly detect any differences. Alternatively, the X-ray spectral changes might only be evident at energies higher than probed by Chandra. Given the available models and current data, no firm conclusions are drawn. These observations will help motivate and direct further work on theoretical models of binary SMBH systems, such as modeling systems with thinner accretion disks and larger binary separations."}],"day":"11","author":[{"last_name":"Saade","first_name":"M. Lynne","full_name":"Saade, M. Lynne"},{"first_name":"Daniel","last_name":"Stern","full_name":"Stern, Daniel"},{"full_name":"Brightman, Murray","first_name":"Murray","last_name":"Brightman"},{"first_name":"Zoltán","full_name":"Haiman, Zoltán","last_name":"Haiman","id":"7c006e8c-cc0d-11ee-8322-cb904ef76f36"},{"last_name":"Djorgovski","full_name":"Djorgovski, S. G.","first_name":"S. G."},{"last_name":"D’Orazio","first_name":"Daniel","full_name":"D’Orazio, Daniel"},{"full_name":"Ford, K. E. S.","first_name":"K. E. S.","last_name":"Ford"},{"full_name":"Graham, Matthew J.","first_name":"Matthew J.","last_name":"Graham"},{"last_name":"Jun","full_name":"Jun, Hyunsung D.","first_name":"Hyunsung D."},{"last_name":"Kraft","first_name":"Ralph P.","full_name":"Kraft, Ralph P."},{"first_name":"Barry","full_name":"McKernan, Barry","last_name":"McKernan"},{"first_name":"Alexei","last_name":"Vikhlinin","full_name":"Vikhlinin, Alexei"},{"first_name":"Dominic J.","full_name":"Walton, Dominic J.","last_name":"Walton"}],"title":"Chandra observations of candidate subparsec binary supermassive black holes","main_file_link":[{"url":"https://doi.org/10.3847/1538-4357/abad31","open_access":"1"}],"type":"journal_article","publisher":"American Astronomical Society","status":"public","date_updated":"2024-09-19T11:29:46Z","intvolume":" 900","doi":"10.3847/1538-4357/abad31","_id":"17581","year":"2020","article_type":"original","user_id":"317138e5-6ab7-11ef-aa6d-ffef3953e345","date_created":"2024-09-05T12:25:06Z","language":[{"iso":"eng"}],"publication_identifier":{"issn":["0004-637X","1538-4357"]},"quality_controlled":"1","date_published":"2020-09-11T00:00:00Z","volume":900,"article_processing_charge":"No","month":"09","oa":1,"citation":{"ista":"Saade ML, Stern D, Brightman M, Haiman Z, Djorgovski SG, D’Orazio D, Ford KES, Graham MJ, Jun HD, Kraft RP, McKernan B, Vikhlinin A, Walton DJ. 2020. Chandra observations of candidate subparsec binary supermassive black holes. The Astrophysical Journal. 900(2), 148.","short":"M.L. Saade, D. Stern, M. Brightman, Z. Haiman, S.G. Djorgovski, D. D’Orazio, K.E.S. Ford, M.J. Graham, H.D. Jun, R.P. Kraft, B. McKernan, A. Vikhlinin, D.J. Walton, The Astrophysical Journal 900 (2020).","apa":"Saade, M. L., Stern, D., Brightman, M., Haiman, Z., Djorgovski, S. G., D’Orazio, D., … Walton, D. J. (2020). Chandra observations of candidate subparsec binary supermassive black holes. The Astrophysical Journal. American Astronomical Society. https://doi.org/10.3847/1538-4357/abad31","mla":"Saade, M. Lynne, et al. “Chandra Observations of Candidate Subparsec Binary Supermassive Black Holes.” The Astrophysical Journal, vol. 900, no. 2, 148, American Astronomical Society, 2020, doi:10.3847/1538-4357/abad31.","ieee":"M. L. Saade et al., “Chandra observations of candidate subparsec binary supermassive black holes,” The Astrophysical Journal, vol. 900, no. 2. American Astronomical Society, 2020.","ama":"Saade ML, Stern D, Brightman M, et al. Chandra observations of candidate subparsec binary supermassive black holes. The Astrophysical Journal. 2020;900(2). doi:10.3847/1538-4357/abad31","chicago":"Saade, M. Lynne, Daniel Stern, Murray Brightman, Zoltán Haiman, S. G. Djorgovski, Daniel D’Orazio, K. E. S. Ford, et al. “Chandra Observations of Candidate Subparsec Binary Supermassive Black Holes.” The Astrophysical Journal. American Astronomical Society, 2020. https://doi.org/10.3847/1538-4357/abad31."}},{"publication_identifier":{"issn":["0004-637X","1538-4357"]},"quality_controlled":"1","language":[{"iso":"eng"}],"date_created":"2024-09-05T12:33:11Z","citation":{"ama":"Tagawa H, Haiman Z, Kocsis B. Formation and evolution of compact-object binaries in AGN disks. The Astrophysical Journal. 2020;898(1). doi:10.3847/1538-4357/ab9b8c","chicago":"Tagawa, Hiromichi, Zoltán Haiman, and Bence Kocsis. “Formation and Evolution of Compact-Object Binaries in AGN Disks.” The Astrophysical Journal. American Astronomical Society, 2020. https://doi.org/10.3847/1538-4357/ab9b8c.","mla":"Tagawa, Hiromichi, et al. “Formation and Evolution of Compact-Object Binaries in AGN Disks.” The Astrophysical Journal, vol. 898, no. 1, 25, American Astronomical Society, 2020, doi:10.3847/1538-4357/ab9b8c.","ieee":"H. Tagawa, Z. Haiman, and B. Kocsis, “Formation and evolution of compact-object binaries in AGN disks,” The Astrophysical Journal, vol. 898, no. 1. American Astronomical Society, 2020.","apa":"Tagawa, H., Haiman, Z., & Kocsis, B. (2020). Formation and evolution of compact-object binaries in AGN disks. The Astrophysical Journal. American Astronomical Society. https://doi.org/10.3847/1538-4357/ab9b8c","short":"H. Tagawa, Z. Haiman, B. Kocsis, The Astrophysical Journal 898 (2020).","ista":"Tagawa H, Haiman Z, Kocsis B. 2020. Formation and evolution of compact-object binaries in AGN disks. The Astrophysical Journal. 898(1), 25."},"oa":1,"article_processing_charge":"No","volume":898,"month":"07","date_published":"2020-07-20T00:00:00Z","doi":"10.3847/1538-4357/ab9b8c","intvolume":" 898","date_updated":"2024-09-19T11:59:23Z","publisher":"American Astronomical Society","status":"public","type":"journal_article","user_id":"317138e5-6ab7-11ef-aa6d-ffef3953e345","article_type":"original","year":"2020","_id":"17587","author":[{"first_name":"Hiromichi","last_name":"Tagawa","full_name":"Tagawa, Hiromichi"},{"id":"7c006e8c-cc0d-11ee-8322-cb904ef76f36","last_name":"Haiman","first_name":"Zoltán","full_name":"Haiman, Zoltán"},{"last_name":"Kocsis","first_name":"Bence","full_name":"Kocsis, Bence"}],"main_file_link":[{"url":"https://doi.org/10.3847/1538-4357/ab9b8c","open_access":"1"}],"title":"Formation and evolution of compact-object binaries in AGN disks","article_number":"25","scopus_import":"1","extern":"1","publication_status":"published","day":"20","abstract":[{"text":"The astrophysical origin of gravitational wave (GW) events discovered by LIGO/VIRGO remains an outstanding puzzle. In active galactic nuclei (AGNs), compact-object binaries form, evolve, and interact with a dense star cluster and a gas disk. An important question is whether and how binaries merge in these environments. To address this question, we have performed one-dimensional N-body simulations combined with a semianalytical model that includes the formation, disruption, and evolution of binaries self-consistently. We point out that binaries can form in single–single interactions through the dissipation of kinetic energy in a gaseous medium. This \"gas-capture\" binary formation channel contributes up to 97% of gas-driven mergers and leads to a high merger rate in AGN disks even without preexisting binaries. We find the merger rate to be in the range of ∼0.02–60 Gpc−3 yr−1. The results are insensitive to the assumptions on the gaseous hardening processes: we find that once they are formed, binaries merge efficiently via binary–single interactions even if these gaseous processes are ignored. We find that the average number of mergers per black hole (BH) is 0.4, and the probability for repeated mergers in 30 Myr is ∼0.21–0.45. High BH masses due to repeated mergers, high eccentricities, and a significant Doppler drift of GWs are promising signatures that distinguish this merger channel from others. Furthermore, we find that gas-capture binaries reproduce the distribution of low-mass X-ray binaries in the Galactic center, including an outer cutoff at ∼1 pc due to the competition between migration and hardening by gas torques.","lang":"eng"}],"publication":"The Astrophysical Journal","issue":"1","oa_version":"Published Version"},{"arxiv":1,"date_created":"2024-09-05T12:37:26Z","publication_identifier":{"issn":["2470-0010","2470-0029"]},"quality_controlled":"1","language":[{"iso":"eng"}],"date_published":"2020-04-10T00:00:00Z","citation":{"mla":"Matilla, José Manuel Zorrilla, and Zoltán Haiman. “Probing Gaseous Galactic Halos through the Rotational Kinematic Sunyaev-Zeldovich Effect.” Physical Review D, vol. 101, no. 8, 083016, American Physical Society, 2020, doi:10.1103/physrevd.101.083016.","ieee":"J. M. Z. Matilla and Z. Haiman, “Probing gaseous galactic halos through the rotational kinematic Sunyaev-Zeldovich effect,” Physical Review D, vol. 101, no. 8. American Physical Society, 2020.","apa":"Matilla, J. M. Z., & Haiman, Z. (2020). Probing gaseous galactic halos through the rotational kinematic Sunyaev-Zeldovich effect. Physical Review D. American Physical Society. https://doi.org/10.1103/physrevd.101.083016","ama":"Matilla JMZ, Haiman Z. Probing gaseous galactic halos through the rotational kinematic Sunyaev-Zeldovich effect. Physical Review D. 2020;101(8). doi:10.1103/physrevd.101.083016","chicago":"Matilla, José Manuel Zorrilla, and Zoltán Haiman. “Probing Gaseous Galactic Halos through the Rotational Kinematic Sunyaev-Zeldovich Effect.” Physical Review D. American Physical Society, 2020. https://doi.org/10.1103/physrevd.101.083016.","short":"J.M.Z. Matilla, Z. Haiman, Physical Review D 101 (2020).","ista":"Matilla JMZ, Haiman Z. 2020. Probing gaseous galactic halos through the rotational kinematic Sunyaev-Zeldovich effect. Physical Review D. 101(8), 083016."},"oa":1,"article_processing_charge":"No","month":"04","volume":101,"intvolume":" 101","date_updated":"2024-09-19T12:26:58Z","type":"journal_article","publisher":"American Physical Society","status":"public","doi":"10.1103/physrevd.101.083016","year":"2020","_id":"17591","user_id":"317138e5-6ab7-11ef-aa6d-ffef3953e345","article_type":"original","external_id":{"arxiv":["1909.04690"]},"author":[{"first_name":"José Manuel Zorrilla","full_name":"Matilla, José Manuel Zorrilla","last_name":"Matilla"},{"full_name":"Haiman, Zoltán","id":"7c006e8c-cc0d-11ee-8322-cb904ef76f36","last_name":"Haiman","first_name":"Zoltán"}],"title":"Probing gaseous galactic halos through the rotational kinematic Sunyaev-Zeldovich effect","main_file_link":[{"url":" https://doi.org/10.48550/arXiv.1909.04690","open_access":"1"}],"scopus_import":"1","publication_status":"published","extern":"1","article_number":"083016","oa_version":"Preprint","day":"10","abstract":[{"text":"The rotational kinematic Sunyaev-Zeldovich (rkSZ) signal, imprinted on the cosmic microwave background (CMB) by the gaseous halos (spinning “atmospheres”) of foreground galaxies, would be a novel probe of galaxy formation. Although the signal is too weak to detect in individual galaxies, we analyze the feasibility of its statistical detection via stacking CMB data on many galaxies for which the spin orientation can be estimated spectroscopically. We use an “optimistic” model, in which fully ionized atmospheres contain the cosmic baryon fraction and spin at the halo’s circular velocity 𝑣circ, and a more realistic model, based on hydrodynamical simulations, with multiphase atmospheres spinning at a fraction of 𝑣circ. We incorporate realistic noise estimates into our analysis. Using low-redshift galaxy properties from the MaNGA spectroscopic survey (with median halo mass of 6.6×1011 𝑀⊙), and CMB data quality from Planck, we find that a 3𝜎 detection would require a few×104 galaxies, even in the optimistic model. This is too high for current surveys, but upcoming higher-angular resolution CMB experiments will significantly reduce the requirements: stacking CMB data on galaxy spins in a ∼10 deg2 can rule out the optimistic models, and ≈350 deg2 will suffice for a 3𝜎 detection with ACT. As a proof-of-concept, we stacked Planck data on the position of ≈2,000 MaNGA galaxies, aligned with the galaxies’ projected spin, and scaled to their halos’ angular size. We rule out average temperature dipoles larger than ≈1.9 𝜇K around field spiral galaxies.","lang":"eng"}],"publication":"Physical Review D","issue":"8"},{"date_published":"2020-10-09T00:00:00Z","citation":{"mla":"Wolcott-Green, Jemma, et al. “Suppression of H2 Cooling in Protogalaxies Aided by Trapped Lyα Cooling Radiation.” Monthly Notices of the Royal Astronomical Society, vol. 500, no. 1, Oxford University Press, 2020, pp. 138–44, doi:10.1093/mnras/staa3057.","ieee":"J. Wolcott-Green, Z. Haiman, and G. L. Bryan, “Suppression of H2 cooling in protogalaxies aided by trapped Lyα cooling radiation,” Monthly Notices of the Royal Astronomical Society, vol. 500, no. 1. Oxford University Press, pp. 138–144, 2020.","apa":"Wolcott-Green, J., Haiman, Z., & Bryan, G. L. (2020). Suppression of H2 cooling in protogalaxies aided by trapped Lyα cooling radiation. Monthly Notices of the Royal Astronomical Society. Oxford University Press. https://doi.org/10.1093/mnras/staa3057","ama":"Wolcott-Green J, Haiman Z, Bryan GL. Suppression of H2 cooling in protogalaxies aided by trapped Lyα cooling radiation. Monthly Notices of the Royal Astronomical Society. 2020;500(1):138-144. doi:10.1093/mnras/staa3057","chicago":"Wolcott-Green, Jemma, Zoltán Haiman, and Greg L Bryan. “Suppression of H2 Cooling in Protogalaxies Aided by Trapped Lyα Cooling Radiation.” Monthly Notices of the Royal Astronomical Society. Oxford University Press, 2020. https://doi.org/10.1093/mnras/staa3057.","short":"J. Wolcott-Green, Z. Haiman, G.L. Bryan, Monthly Notices of the Royal Astronomical Society 500 (2020) 138–144.","ista":"Wolcott-Green J, Haiman Z, Bryan GL. 2020. Suppression of H2 cooling in protogalaxies aided by trapped Lyα cooling radiation. Monthly Notices of the Royal Astronomical Society. 500(1), 138–144."},"oa":1,"article_processing_charge":"No","month":"10","volume":500,"date_created":"2024-09-05T12:42:37Z","publication_identifier":{"issn":["0035-8711","1365-2966"]},"quality_controlled":"1","language":[{"iso":"eng"}],"year":"2020","_id":"17595","page":"138-144","user_id":"317138e5-6ab7-11ef-aa6d-ffef3953e345","article_type":"original","intvolume":" 500","date_updated":"2024-09-23T12:42:07Z","type":"journal_article","publisher":"Oxford University Press","status":"public","doi":"10.1093/mnras/staa3057","title":"Suppression of H2 cooling in protogalaxies aided by trapped Lyα cooling radiation","main_file_link":[{"url":"https://doi.org/10.1093/mnras/staa3057","open_access":"1"}],"author":[{"last_name":"Wolcott-Green","first_name":"Jemma","full_name":"Wolcott-Green, Jemma"},{"id":"7c006e8c-cc0d-11ee-8322-cb904ef76f36","last_name":"Haiman","first_name":"Zoltán","full_name":"Haiman, Zoltán"},{"full_name":"Bryan, Greg L","first_name":"Greg L","last_name":"Bryan"}],"oa_version":"Published Version","abstract":[{"lang":"eng","text":"We study the thermal evolution of UV-irradiated atomic cooling haloes using high-resolution three-dimensional hydrodynamic simulations. We consider the effect of H− photodetachment by Lyα cooling radiation trapped in the optically-thick cores of three such haloes, a process that has not been included in previous simulations. Because H− is a precursor of molecular hydrogen, its destruction can diminish the H2 abundance and cooling. We find that the critical UV flux for suppressing H2-cooling is decreased by ∼15–50 per cent in our fiducial models. Previous one-zone modelling found a larger effect, with Jcrit reduced by a factor of a few; we show that adopting a constant halo mass to determine the trapped Lyα energy density, as is done in the one-zone models, yields a larger reduction in Jcrit, consistent with their findings. Our results nevertheless suggest that Lyα radiation may have an important effect on the thermal evolution of UV-irradiated haloes, and therefore on the potential for massive black hole formation."}],"day":"09","issue":"1","publication":"Monthly Notices of the Royal Astronomical Society","scopus_import":"1","extern":"1","publication_status":"published"},{"article_number":"138","publication_status":"published","extern":"1","scopus_import":"1","issue":"2","publication":"The Astrophysical Journal","day":"22","abstract":[{"lang":"eng","text":"Binary black hole mergers encode information about their environment and the astrophysical processes that led to their formation. Measuring the redshift dependence of their merger rate will help probe the formation and evolution of galaxies and the evolution of the star formation rate. Here we compute the cosmic evolution of the merger rate for stellar-mass binaries in the disks of active galactic nuclei (AGNs). We focus on recent evolution out to redshift z = 2, covering the accessible range of current Earth-based gravitational-wave observatories. On this scale, the AGN population density is the main contributor to redshift dependence. We find that the AGN-assisted merger rate varies by less than a factor of two in the range 0 < z ≤ 2, comparable to the expected level of evolution for globular clusters, but much smaller than the order-of-magnitude evolution for field binaries."}],"oa_version":"Preprint","author":[{"last_name":"Yang","first_name":"Y.","full_name":"Yang, Y."},{"full_name":"Bartos, I.","first_name":"I.","last_name":"Bartos"},{"full_name":"Haiman, Zoltán","id":"7c006e8c-cc0d-11ee-8322-cb904ef76f36","last_name":"Haiman","first_name":"Zoltán"},{"first_name":"B.","last_name":"Kocsis","full_name":"Kocsis, B."},{"full_name":"Márka, S.","last_name":"Márka","first_name":"S."},{"full_name":"Tagawa, H.","last_name":"Tagawa","first_name":"H."}],"external_id":{"arxiv":["2003.08564"]},"main_file_link":[{"url":" https://doi.org/10.48550/arXiv.2003.08564","open_access":"1"}],"title":"Cosmic evolution of stellar-mass black hole merger rate in active galactic nuclei","doi":"10.3847/1538-4357/ab91b4","publisher":"American Astronomical Society","status":"public","type":"journal_article","date_updated":"2024-09-23T12:59:52Z","intvolume":" 896","article_type":"original","user_id":"317138e5-6ab7-11ef-aa6d-ffef3953e345","_id":"17596","year":"2020","language":[{"iso":"eng"}],"publication_identifier":{"issn":["0004-637X","1538-4357"]},"quality_controlled":"1","date_created":"2024-09-05T12:43:28Z","arxiv":1,"volume":896,"article_processing_charge":"No","month":"06","oa":1,"citation":{"short":"Y. Yang, I. Bartos, Z. Haiman, B. Kocsis, S. Márka, H. Tagawa, The Astrophysical Journal 896 (2020).","ista":"Yang Y, Bartos I, Haiman Z, Kocsis B, Márka S, Tagawa H. 2020. Cosmic evolution of stellar-mass black hole merger rate in active galactic nuclei. The Astrophysical Journal. 896(2), 138.","mla":"Yang, Y., et al. “Cosmic Evolution of Stellar-Mass Black Hole Merger Rate in Active Galactic Nuclei.” The Astrophysical Journal, vol. 896, no. 2, 138, American Astronomical Society, 2020, doi:10.3847/1538-4357/ab91b4.","ieee":"Y. Yang, I. Bartos, Z. Haiman, B. Kocsis, S. Márka, and H. Tagawa, “Cosmic evolution of stellar-mass black hole merger rate in active galactic nuclei,” The Astrophysical Journal, vol. 896, no. 2. American Astronomical Society, 2020.","apa":"Yang, Y., Bartos, I., Haiman, Z., Kocsis, B., Márka, S., & Tagawa, H. (2020). Cosmic evolution of stellar-mass black hole merger rate in active galactic nuclei. The Astrophysical Journal. American Astronomical Society. https://doi.org/10.3847/1538-4357/ab91b4","ama":"Yang Y, Bartos I, Haiman Z, Kocsis B, Márka S, Tagawa H. Cosmic evolution of stellar-mass black hole merger rate in active galactic nuclei. The Astrophysical Journal. 2020;896(2). doi:10.3847/1538-4357/ab91b4","chicago":"Yang, Y., I. Bartos, Zoltán Haiman, B. Kocsis, S. Márka, and H. Tagawa. “Cosmic Evolution of Stellar-Mass Black Hole Merger Rate in Active Galactic Nuclei.” The Astrophysical Journal. American Astronomical Society, 2020. https://doi.org/10.3847/1538-4357/ab91b4."},"date_published":"2020-06-22T00:00:00Z"},{"arxiv":1,"date_created":"2024-09-05T12:44:45Z","publication_identifier":{"issn":["2470-0010","2470-0029"]},"quality_controlled":"1","language":[{"iso":"eng"}],"date_published":"2020-07-09T00:00:00Z","citation":{"short":"J.M.Z. Matilla, M. Sharma, D. Hsu, Z. Haiman, Physical Review D 102 (2020).","ista":"Matilla JMZ, Sharma M, Hsu D, Haiman Z. 2020. Interpreting deep learning models for weak lensing. Physical Review D. 102(12), 123506.","ama":"Matilla JMZ, Sharma M, Hsu D, Haiman Z. Interpreting deep learning models for weak lensing. Physical Review D. 2020;102(12). doi:10.1103/physrevd.102.123506","chicago":"Matilla, José Manuel Zorrilla, Manasi Sharma, Daniel Hsu, and Zoltán Haiman. “Interpreting Deep Learning Models for Weak Lensing.” Physical Review D. American Physical Society, 2020. https://doi.org/10.1103/physrevd.102.123506.","mla":"Matilla, José Manuel Zorrilla, et al. “Interpreting Deep Learning Models for Weak Lensing.” Physical Review D, vol. 102, no. 12, 123506, American Physical Society, 2020, doi:10.1103/physrevd.102.123506.","ieee":"J. M. Z. Matilla, M. Sharma, D. Hsu, and Z. Haiman, “Interpreting deep learning models for weak lensing,” Physical Review D, vol. 102, no. 12. American Physical Society, 2020.","apa":"Matilla, J. M. Z., Sharma, M., Hsu, D., & Haiman, Z. (2020). Interpreting deep learning models for weak lensing. Physical Review D. American Physical Society. https://doi.org/10.1103/physrevd.102.123506"},"oa":1,"volume":102,"month":"07","article_processing_charge":"No","intvolume":" 102","date_updated":"2024-09-23T13:04:36Z","type":"journal_article","status":"public","publisher":"American Physical Society","doi":"10.1103/physrevd.102.123506","year":"2020","_id":"17597","user_id":"317138e5-6ab7-11ef-aa6d-ffef3953e345","article_type":"original","external_id":{"arxiv":["2007.06529"]},"author":[{"last_name":"Matilla","full_name":"Matilla, José Manuel Zorrilla","first_name":"José Manuel Zorrilla"},{"last_name":"Sharma","first_name":"Manasi","full_name":"Sharma, Manasi"},{"full_name":"Hsu, Daniel","first_name":"Daniel","last_name":"Hsu"},{"full_name":"Haiman, Zoltán","last_name":"Haiman","first_name":"Zoltán","id":"7c006e8c-cc0d-11ee-8322-cb904ef76f36"}],"title":"Interpreting deep learning models for weak lensing","main_file_link":[{"url":" https://doi.org/10.48550/arXiv.2007.06529","open_access":"1"}],"scopus_import":"1","extern":"1","publication_status":"published","article_number":"123506","oa_version":"Preprint","day":"09","abstract":[{"lang":"eng","text":"Deep Neural Networks (DNNs) are powerful algorithms that have been proven capable of extracting non-Gaussian information from weak lensing (WL) data sets. Understanding which features in the data determine the output of these nested, non-linear algorithms is an important but challenging task. We analyze a DNN that has been found in previous work to accurately recover cosmological parameters in simulated maps of the WL convergence (κ). We derive constraints on the cosmological parameter pair (Ωm,σ8) from a combination of three commonly used WL statistics (power spectrum, lensing peaks, and Minkowski functionals), using ray-traced simulated κ maps. We show that the network can improve the inferred parameter constraints relative to this combination by 20% even in the presence of realistic levels of shape noise. We apply a series of well established saliency methods to interpret the DNN and find that the most relevant pixels are those with extreme κ values. For noiseless maps, regions with negative κ account for 86−69% of the attribution of the DNN output, defined as the square of the saliency in input space. In the presence of shape nose, the attribution concentrates in high convergence regions, with 36−68% of the attribution in regions with κ>3σκ."}],"issue":"12","publication":"Physical Review D"},{"author":[{"full_name":"De Rosa, Alessandra","first_name":"Alessandra","last_name":"De Rosa"},{"full_name":"Vignali, Cristian","first_name":"Cristian","last_name":"Vignali"},{"first_name":"Tamara","full_name":"Bogdanović, Tamara","last_name":"Bogdanović"},{"last_name":"Capelo","full_name":"Capelo, Pedro R.","first_name":"Pedro R."},{"full_name":"Charisi, Maria","last_name":"Charisi","first_name":"Maria"},{"last_name":"Dotti","full_name":"Dotti, Massimo","first_name":"Massimo"},{"full_name":"Husemann, Bernd","first_name":"Bernd","last_name":"Husemann"},{"full_name":"Lusso, Elisabeta","first_name":"Elisabeta","last_name":"Lusso"},{"last_name":"Mayer","full_name":"Mayer, Lucio","first_name":"Lucio"},{"first_name":"Zsolt","last_name":"Paragi","full_name":"Paragi, Zsolt"},{"full_name":"Runnoe, Jessie","last_name":"Runnoe","first_name":"Jessie"},{"first_name":"Alberto","last_name":"Sesana","full_name":"Sesana, Alberto"},{"full_name":"Steinborn, Lisa","last_name":"Steinborn","first_name":"Lisa"},{"first_name":"Stefano","last_name":"Bianchi","full_name":"Bianchi, Stefano"},{"last_name":"Colpi","full_name":"Colpi, Monica","first_name":"Monica"},{"first_name":"Luciano","full_name":"del Valle, Luciano","last_name":"del Valle"},{"first_name":"Sándor","full_name":"Frey, Sándor","last_name":"Frey"},{"first_name":"Krisztina É.","full_name":"Gabányi, Krisztina É.","last_name":"Gabányi"},{"first_name":"Margherita","last_name":"Giustini","full_name":"Giustini, Margherita"},{"first_name":"Matteo","last_name":"Guainazzi","full_name":"Guainazzi, Matteo"},{"id":"7c006e8c-cc0d-11ee-8322-cb904ef76f36","first_name":"Zoltán","full_name":"Haiman, Zoltán","last_name":"Haiman"},{"last_name":"Herrera Ruiz","full_name":"Herrera Ruiz, Noelia","first_name":"Noelia"},{"first_name":"Rubén","full_name":"Herrero-Illana, Rubén","last_name":"Herrero-Illana"},{"last_name":"Iwasawa","full_name":"Iwasawa, Kazushi","first_name":"Kazushi"},{"full_name":"Komossa, S.","first_name":"S.","last_name":"Komossa"},{"full_name":"Lena, Davide","last_name":"Lena","first_name":"Davide"},{"full_name":"Loiseau, Nora","last_name":"Loiseau","first_name":"Nora"},{"first_name":"Miguel","last_name":"Perez-Torres","full_name":"Perez-Torres, Miguel"},{"last_name":"Piconcelli","first_name":"Enrico","full_name":"Piconcelli, Enrico"},{"full_name":"Volonteri, Marta","first_name":"Marta","last_name":"Volonteri"}],"external_id":{"arxiv":["2001.06293"]},"main_file_link":[{"open_access":"1","url":" https://doi.org/10.48550/arXiv.2001.06293"}],"title":"The quest for dual and binary supermassive black holes: A multi-messenger view","article_number":"101525","extern":"1","publication_status":"published","scopus_import":"1","publication":"New Astronomy Reviews","abstract":[{"lang":"eng","text":"The quest for binary and dual supermassive black holes (SMBHs) at the dawn of the multi-messenger era is compelling. Detecting dual active galactic nuclei (AGN) – active SMBHs at projected separations larger than several parsecs – and binary AGN – probing the scale where SMBHs are bound in a Keplerian binary – is an observational challenge. The study of AGN pairs (either dual or binary) also represents an overarching theoretical problem in cosmology and astrophysics. The AGN triggering calls for detailed knowledge of the hydrodynamical conditions of gas in the imminent surroundings of the SMBHs and, at the same time, their duality calls for detailed knowledge on how galaxies assemble through major and minor mergers and grow fed by matter along the filaments of the cosmic web. This review describes the techniques used across the electromagnetic spectrum to detect dual and binary AGN candidates and proposes new avenues for their search. The current observational status is compared with the state-of-the-art numerical simulations and models for formation of dual and binary AGN. Binary SMBHs are among the loudest sources of gravitational waves (GWs) in the Universe. The search for a background of GWs at nHz frequencies from inspiralling SMBHs at low redshifts, and the direct detection of signals from their coalescence by the Laser Interferometer Space Antenna in the next decade, make this a theme of major interest for multi-messenger astrophysics. This review discusses the future facilities and observational strategies that are likely to significantly advance this fascinating field."}],"day":"17","oa_version":"Preprint","language":[{"iso":"eng"}],"publication_identifier":{"issn":["1387-6473"]},"quality_controlled":"1","arxiv":1,"date_created":"2024-09-05T13:07:32Z","oa":1,"article_processing_charge":"No","month":"01","volume":86,"citation":{"short":"A. De Rosa, C. Vignali, T. Bogdanović, P.R. Capelo, M. Charisi, M. Dotti, B. Husemann, E. Lusso, L. Mayer, Z. Paragi, J. Runnoe, A. Sesana, L. Steinborn, S. Bianchi, M. Colpi, L. del Valle, S. Frey, K.É. Gabányi, M. Giustini, M. Guainazzi, Z. Haiman, N. Herrera Ruiz, R. Herrero-Illana, K. Iwasawa, S. Komossa, D. Lena, N. Loiseau, M. Perez-Torres, E. Piconcelli, M. Volonteri, New Astronomy Reviews 86 (2020).","ista":"De Rosa A, Vignali C, Bogdanović T, Capelo PR, Charisi M, Dotti M, Husemann B, Lusso E, Mayer L, Paragi Z, Runnoe J, Sesana A, Steinborn L, Bianchi S, Colpi M, del Valle L, Frey S, Gabányi KÉ, Giustini M, Guainazzi M, Haiman Z, Herrera Ruiz N, Herrero-Illana R, Iwasawa K, Komossa S, Lena D, Loiseau N, Perez-Torres M, Piconcelli E, Volonteri M. 2020. The quest for dual and binary supermassive black holes: A multi-messenger view. New Astronomy Reviews. 86, 101525.","ieee":"A. De Rosa et al., “The quest for dual and binary supermassive black holes: A multi-messenger view,” New Astronomy Reviews, vol. 86. Elsevier BV, 2020.","mla":"De Rosa, Alessandra, et al. “The Quest for Dual and Binary Supermassive Black Holes: A Multi-Messenger View.” New Astronomy Reviews, vol. 86, 101525, Elsevier BV, 2020, doi:10.1016/j.newar.2020.101525.","apa":"De Rosa, A., Vignali, C., Bogdanović, T., Capelo, P. R., Charisi, M., Dotti, M., … Volonteri, M. (2020). The quest for dual and binary supermassive black holes: A multi-messenger view. New Astronomy Reviews. Elsevier BV. https://doi.org/10.1016/j.newar.2020.101525","ama":"De Rosa A, Vignali C, Bogdanović T, et al. The quest for dual and binary supermassive black holes: A multi-messenger view. New Astronomy Reviews. 2020;86. doi:10.1016/j.newar.2020.101525","chicago":"De Rosa, Alessandra, Cristian Vignali, Tamara Bogdanović, Pedro R. Capelo, Maria Charisi, Massimo Dotti, Bernd Husemann, et al. “The Quest for Dual and Binary Supermassive Black Holes: A Multi-Messenger View.” New Astronomy Reviews. Elsevier BV, 2020. https://doi.org/10.1016/j.newar.2020.101525."},"date_published":"2020-01-17T00:00:00Z","doi":"10.1016/j.newar.2020.101525","date_updated":"2024-09-23T13:34:58Z","type":"journal_article","publisher":"Elsevier BV","status":"public","intvolume":" 86","article_type":"original","user_id":"317138e5-6ab7-11ef-aa6d-ffef3953e345","_id":"17600","year":"2020"},{"doi":"10.3847/1538-4357/abab95","publisher":"American Astronomical Society","type":"journal_article","status":"public","date_updated":"2024-09-23T13:39:03Z","intvolume":" 901","article_type":"original","user_id":"317138e5-6ab7-11ef-aa6d-ffef3953e345","_id":"17601","year":"2020","language":[{"iso":"eng"}],"publication_identifier":{"issn":["0004-637X","1538-4357"]},"quality_controlled":"1","date_created":"2024-09-05T13:08:20Z","arxiv":1,"month":"09","article_processing_charge":"No","volume":901,"oa":1,"citation":{"ista":"Duffell PC, D’Orazio D, Derdzinski A, Haiman Z, MacFadyen A, Rosen AL, Zrake J. 2020. Circumbinary disks: Accretion and torque as a function of mass ratio and disk viscosity. The Astrophysical Journal. 901(1), 25.","short":"P.C. Duffell, D. D’Orazio, A. Derdzinski, Z. Haiman, A. MacFadyen, A.L. Rosen, J. Zrake, The Astrophysical Journal 901 (2020).","chicago":"Duffell, Paul C., Daniel D’Orazio, Andrea Derdzinski, Zoltán Haiman, Andrew MacFadyen, Anna L. Rosen, and Jonathan Zrake. “Circumbinary Disks: Accretion and Torque as a Function of Mass Ratio and Disk Viscosity.” The Astrophysical Journal. American Astronomical Society, 2020. https://doi.org/10.3847/1538-4357/abab95.","ama":"Duffell PC, D’Orazio D, Derdzinski A, et al. Circumbinary disks: Accretion and torque as a function of mass ratio and disk viscosity. The Astrophysical Journal. 2020;901(1). doi:10.3847/1538-4357/abab95","apa":"Duffell, P. C., D’Orazio, D., Derdzinski, A., Haiman, Z., MacFadyen, A., Rosen, A. L., & Zrake, J. (2020). Circumbinary disks: Accretion and torque as a function of mass ratio and disk viscosity. The Astrophysical Journal. American Astronomical Society. https://doi.org/10.3847/1538-4357/abab95","ieee":"P. C. Duffell et al., “Circumbinary disks: Accretion and torque as a function of mass ratio and disk viscosity,” The Astrophysical Journal, vol. 901, no. 1. American Astronomical Society, 2020.","mla":"Duffell, Paul C., et al. “Circumbinary Disks: Accretion and Torque as a Function of Mass Ratio and Disk Viscosity.” The Astrophysical Journal, vol. 901, no. 1, 25, American Astronomical Society, 2020, doi:10.3847/1538-4357/abab95."},"date_published":"2020-09-17T00:00:00Z","article_number":"25","extern":"1","publication_status":"published","scopus_import":"1","publication":"The Astrophysical Journal","issue":"1","abstract":[{"text":"Using numerical hydrodynamics calculations and a novel method for densely sampling parameter space, we measure the accretion and torque on a binary system from a circumbinary disk. In agreement with some earlier studies, we find that the net torque on the binary is positive for mass ratios close to unity, and that accretion always drives the binary toward equal mass. Accretion variability depends sensitively on the numerical sink prescription, but the torque and relative accretion onto each component do not depend on the sink timescale. Positive torque and highly variable accretion occurs only for mass ratios greater than around 0.05. This means that for mass ratios below 0.05, the binary would migrate inward until the secondary accreted sufficient mass, after which it would execute a U-turn and migrate outward. We explore a range of viscosities, from α = 0.03 to α = 0.15, and find that this outward torque is proportional to the viscous torque, so that torque per unit accreted mass is independent of α. Dependence of accretion and torque on mass ratio is explored in detail, densely sampling mass ratios between 0.01 and unity. For mass ratio q > 0.2, accretion variability is found to exhibit a distinct sawtooth pattern, typically with a five-orbit cycle that provides a smoking gun prediction for variable quasars observed over long periods, as a potential means to confirm the presence of a binary.","lang":"eng"}],"day":"17","oa_version":"Preprint","author":[{"last_name":"Duffell","first_name":"Paul C.","full_name":"Duffell, Paul C."},{"first_name":"Daniel","full_name":"D’Orazio, Daniel","last_name":"D’Orazio"},{"first_name":"Andrea","full_name":"Derdzinski, Andrea","last_name":"Derdzinski"},{"id":"7c006e8c-cc0d-11ee-8322-cb904ef76f36","first_name":"Zoltán","last_name":"Haiman","full_name":"Haiman, Zoltán"},{"full_name":"MacFadyen, Andrew","first_name":"Andrew","last_name":"MacFadyen"},{"first_name":"Anna L.","full_name":"Rosen, Anna L.","last_name":"Rosen"},{"last_name":"Zrake","full_name":"Zrake, Jonathan","first_name":"Jonathan"}],"external_id":{"arxiv":["1911.05506"]},"main_file_link":[{"url":" https://doi.org/10.48550/arXiv.1911.05506","open_access":"1"}],"title":"Circumbinary disks: Accretion and torque as a function of mass ratio and disk viscosity"},{"main_file_link":[{"open_access":"1","url":" https://doi.org/10.48550/arXiv.2005.09555"}],"title":"Gas-driven inspiral of binaries in thin accretion disks","author":[{"last_name":"Tiede","first_name":"Christopher","full_name":"Tiede, Christopher"},{"last_name":"Zrake","first_name":"Jonathan","full_name":"Zrake, Jonathan"},{"full_name":"MacFadyen, Andrew","last_name":"MacFadyen","first_name":"Andrew"},{"last_name":"Haiman","first_name":"Zoltán","id":"7c006e8c-cc0d-11ee-8322-cb904ef76f36","full_name":"Haiman, Zoltán"}],"external_id":{"arxiv":["2005.09555"]},"publication":"The Astrophysical Journal","issue":"1","day":"28","abstract":[{"lang":"eng","text":"Numerical studies of gas accretion onto supermassive black hole binaries (SMBHBs) have generally been limited to conditions where the circumbinary disk (CBD) is 10-100 times thicker than expected for disks in active galactic nuclei (AGN). This discrepancy arises from technical limitations, and also from publication bias toward replicating fiducial numerical models. Here we present the first systematic study of how the binary's orbital evolution varies with disk scale height. We report three key results: (1) Binary orbital evolution switches from outspiralling for warm disks (aspect ratio ~0.1), to inspiralling for more realistic cooler, thinner disks at a critical aspect ratio ~0.04, corresponding to orbital Mach number ~25. (2) The net torque on the binary arises from a competition between positive torque from gas orbiting close to the black holes, and negative torque from the inner edge of the CBD, which is denser for thinner disks. This leads to increasingly negative net torques on the binary for increasingly thin disks. (3) The accretion rate is modestly suppressed with increasing Mach number. We discuss how our results may influence modeling of the nano-Hz gravitational wave background, as well as estimates of the LISA merger event rate."}],"oa_version":"Preprint","article_number":"43","extern":"1","publication_status":"published","scopus_import":"1","volume":900,"article_processing_charge":"No","month":"08","oa":1,"citation":{"short":"C. Tiede, J. Zrake, A. MacFadyen, Z. Haiman, The Astrophysical Journal 900 (2020).","ista":"Tiede C, Zrake J, MacFadyen A, Haiman Z. 2020. Gas-driven inspiral of binaries in thin accretion disks. The Astrophysical Journal. 900(1), 43.","ama":"Tiede C, Zrake J, MacFadyen A, Haiman Z. Gas-driven inspiral of binaries in thin accretion disks. The Astrophysical Journal. 2020;900(1). doi:10.3847/1538-4357/aba432","chicago":"Tiede, Christopher, Jonathan Zrake, Andrew MacFadyen, and Zoltán Haiman. “Gas-Driven Inspiral of Binaries in Thin Accretion Disks.” The Astrophysical Journal. American Astronomical Society, 2020. https://doi.org/10.3847/1538-4357/aba432.","mla":"Tiede, Christopher, et al. “Gas-Driven Inspiral of Binaries in Thin Accretion Disks.” The Astrophysical Journal, vol. 900, no. 1, 43, American Astronomical Society, 2020, doi:10.3847/1538-4357/aba432.","ieee":"C. Tiede, J. Zrake, A. MacFadyen, and Z. Haiman, “Gas-driven inspiral of binaries in thin accretion disks,” The Astrophysical Journal, vol. 900, no. 1. American Astronomical Society, 2020.","apa":"Tiede, C., Zrake, J., MacFadyen, A., & Haiman, Z. (2020). Gas-driven inspiral of binaries in thin accretion disks. The Astrophysical Journal. American Astronomical Society. https://doi.org/10.3847/1538-4357/aba432"},"date_published":"2020-08-28T00:00:00Z","language":[{"iso":"eng"}],"publication_identifier":{"issn":["0004-637X","1538-4357"]},"quality_controlled":"1","date_created":"2024-09-05T13:12:20Z","arxiv":1,"article_type":"original","user_id":"317138e5-6ab7-11ef-aa6d-ffef3953e345","_id":"17604","year":"2020","doi":"10.3847/1538-4357/aba432","status":"public","publisher":"American Astronomical Society","type":"journal_article","date_updated":"2024-09-23T13:59:30Z","intvolume":" 900"},{"date_published":"2020-02-18T00:00:00Z","citation":{"ista":"Gayathri V, Bartos I, Haiman Z, Klimenko S, Kocsis B, Márka S, Yang Y. 2020. GW170817A as a hierarchical black hole merger. The Astrophysical Journal Letters. 890(2), L20.","short":"V. Gayathri, I. Bartos, Z. Haiman, S. Klimenko, B. Kocsis, S. Márka, Y. Yang, The Astrophysical Journal Letters 890 (2020).","chicago":"Gayathri, V., I. Bartos, Zoltán Haiman, S. Klimenko, B. Kocsis, S. Márka, and Y. Yang. “GW170817A as a Hierarchical Black Hole Merger.” The Astrophysical Journal Letters. American Astronomical Society, 2020. https://doi.org/10.3847/2041-8213/ab745d.","ama":"Gayathri V, Bartos I, Haiman Z, et al. GW170817A as a hierarchical black hole merger. The Astrophysical Journal Letters. 2020;890(2). doi:10.3847/2041-8213/ab745d","apa":"Gayathri, V., Bartos, I., Haiman, Z., Klimenko, S., Kocsis, B., Márka, S., & Yang, Y. (2020). GW170817A as a hierarchical black hole merger. The Astrophysical Journal Letters. American Astronomical Society. https://doi.org/10.3847/2041-8213/ab745d","ieee":"V. Gayathri et al., “GW170817A as a hierarchical black hole merger,” The Astrophysical Journal Letters, vol. 890, no. 2. American Astronomical Society, 2020.","mla":"Gayathri, V., et al. “GW170817A as a Hierarchical Black Hole Merger.” The Astrophysical Journal Letters, vol. 890, no. 2, L20, American Astronomical Society, 2020, doi:10.3847/2041-8213/ab745d."},"oa":1,"volume":890,"article_processing_charge":"No","month":"02","arxiv":1,"date_created":"2024-09-05T13:13:33Z","quality_controlled":"1","publication_identifier":{"issn":["2041-8205","2041-8213"]},"language":[{"iso":"eng"}],"year":"2020","_id":"17605","user_id":"317138e5-6ab7-11ef-aa6d-ffef3953e345","article_type":"original","intvolume":" 890","date_updated":"2024-09-23T14:04:29Z","publisher":"American Astronomical Society","type":"journal_article","status":"public","doi":"10.3847/2041-8213/ab745d","title":"GW170817A as a hierarchical black hole merger","main_file_link":[{"open_access":"1","url":" https://doi.org/10.48550/arXiv.1911.11142"}],"external_id":{"arxiv":["1911.11142"]},"author":[{"last_name":"Gayathri","full_name":"Gayathri, V.","first_name":"V."},{"last_name":"Bartos","first_name":"I.","full_name":"Bartos, I."},{"full_name":"Haiman, Zoltán","id":"7c006e8c-cc0d-11ee-8322-cb904ef76f36","first_name":"Zoltán","last_name":"Haiman"},{"first_name":"S.","full_name":"Klimenko, S.","last_name":"Klimenko"},{"last_name":"Kocsis","full_name":"Kocsis, B.","first_name":"B."},{"last_name":"Márka","full_name":"Márka, S.","first_name":"S."},{"last_name":"Yang","full_name":"Yang, Y.","first_name":"Y."}],"oa_version":"Preprint","abstract":[{"lang":"eng","text":"Despite the rapidly growing number of stellar-mass binary black hole mergers discovered through gravitational waves, the origin of these binaries is still not known. In galactic centers, black holes can be brought to each others' proximity by dynamical processes, resulting in mergers. It is also possible that black holes formed in previous mergers encounter new black holes, resulting in so-called hierarchical mergers. Hierarchical events carry signatures such as higher-than-usual black hole mass and spin. Here we show that the recently reported gravitational-wave candidate, GW170817A, could be the result of such a hierarchical merger. In particular, its chirp mass ∼40 M⊙ and effective spin of χeff ∼ 0.5 are the typically expected values from hierarchical mergers within the disks of active galactic nuclei. We find that the reconstructed parameters of GW170817A strongly favor a hierarchical merger origin over having been produced by an isolated binary origin (with an odds ratio of > 10^3)."}],"day":"18","issue":"2","publication":"The Astrophysical Journal Letters","scopus_import":"1","publication_status":"published","extern":"1","article_number":"L20"},{"oa_version":"Preprint","issue":"2","publication":"The Astrophysical Journal Letters","day":"01","abstract":[{"text":"The heaviest neutron stars and lightest black holes expected to be produced by stellar evolution leave the mass-range 2.2 M⊙≲m≲5 M⊙ largely unpopulated. Objects found in this so-called lower mass gap likely originate from a distinct astrophysical process. Such an object, with mass 2.6 M⊙ was recently detected in the binary merger GW190814 through gravitational waves by LIGO/Virgo. Here we show that black holes in the mass gap are naturally assembled through mergers and accretion in AGN disks, and can subsequently participate in additional mergers. We compute the properties of AGN-assisted mergers involving neutron stars and black holes, accounting for accretion. We find that mergers in which one of the objects is in the lower mass gap represent up to 4% of AGN-assisted mergers detectable by LIGO/Virgo. The lighter object of GW190814, with mass 2.6 M⊙, could have grown in an AGN disk through accretion. We find that the unexpectedly high total mass of 3.4 M⊙ observed in the neutron star merger GW190425 may also be due to accretion in an AGN disk.","lang":"eng"}],"extern":"1","publication_status":"published","scopus_import":"1","article_number":"L34","title":"Black hole formation in the lower mass gap through mergers and accretion in AGN disks","main_file_link":[{"url":" https://doi.org/10.48550/arXiv.2007.04781","open_access":"1"}],"external_id":{"arxiv":["2007.04781"]},"author":[{"full_name":"Yang, Y.","first_name":"Y.","last_name":"Yang"},{"first_name":"V.","last_name":"Gayathri","full_name":"Gayathri, V."},{"last_name":"Bartos","first_name":"I.","full_name":"Bartos, I."},{"last_name":"Haiman","id":"7c006e8c-cc0d-11ee-8322-cb904ef76f36","first_name":"Zoltán","full_name":"Haiman, Zoltán"},{"last_name":"Safarzadeh","first_name":"M.","full_name":"Safarzadeh, M."},{"full_name":"Tagawa, H.","last_name":"Tagawa","first_name":"H."}],"_id":"17607","year":"2020","article_type":"original","user_id":"317138e5-6ab7-11ef-aa6d-ffef3953e345","date_updated":"2024-09-23T14:16:49Z","type":"journal_article","status":"public","publisher":"American Astronomical Society","intvolume":" 901","doi":"10.3847/2041-8213/abb940","date_published":"2020-10-01T00:00:00Z","oa":1,"month":"10","volume":901,"article_processing_charge":"No","citation":{"chicago":"Yang, Y., V. Gayathri, I. Bartos, Zoltán Haiman, M. Safarzadeh, and H. Tagawa. “Black Hole Formation in the Lower Mass Gap through Mergers and Accretion in AGN Disks.” The Astrophysical Journal Letters. American Astronomical Society, 2020. https://doi.org/10.3847/2041-8213/abb940.","ama":"Yang Y, Gayathri V, Bartos I, Haiman Z, Safarzadeh M, Tagawa H. Black hole formation in the lower mass gap through mergers and accretion in AGN disks. The Astrophysical Journal Letters. 2020;901(2). doi:10.3847/2041-8213/abb940","ieee":"Y. Yang, V. Gayathri, I. Bartos, Z. Haiman, M. Safarzadeh, and H. Tagawa, “Black hole formation in the lower mass gap through mergers and accretion in AGN disks,” The Astrophysical Journal Letters, vol. 901, no. 2. American Astronomical Society, 2020.","mla":"Yang, Y., et al. “Black Hole Formation in the Lower Mass Gap through Mergers and Accretion in AGN Disks.” The Astrophysical Journal Letters, vol. 901, no. 2, L34, American Astronomical Society, 2020, doi:10.3847/2041-8213/abb940.","apa":"Yang, Y., Gayathri, V., Bartos, I., Haiman, Z., Safarzadeh, M., & Tagawa, H. (2020). Black hole formation in the lower mass gap through mergers and accretion in AGN disks. The Astrophysical Journal Letters. American Astronomical Society. https://doi.org/10.3847/2041-8213/abb940","short":"Y. Yang, V. Gayathri, I. Bartos, Z. Haiman, M. Safarzadeh, H. Tagawa, The Astrophysical Journal Letters 901 (2020).","ista":"Yang Y, Gayathri V, Bartos I, Haiman Z, Safarzadeh M, Tagawa H. 2020. Black hole formation in the lower mass gap through mergers and accretion in AGN disks. The Astrophysical Journal Letters. 901(2), L34."},"arxiv":1,"date_created":"2024-09-05T13:15:59Z","language":[{"iso":"eng"}],"publication_identifier":{"issn":["2041-8205","2041-8213"]},"quality_controlled":"1"},{"isi":1,"article_type":"original","user_id":"4359f0d1-fa6c-11eb-b949-802e58b17ae8","_id":"177","page":"893-948","year":"2020","doi":"10.4007/annals.2020.191.3.4","publist_id":"7744","date_updated":"2024-10-21T06:02:25Z","type":"journal_article","status":"public","publisher":"Princeton University","intvolume":" 191","oa":1,"month":"05","article_processing_charge":"No","volume":191,"citation":{"ieee":"T. D. Browning and W. Sawin, “A geometric version of the circle method,” Annals of Mathematics, vol. 191, no. 3. Princeton University, pp. 893–948, 2020.","mla":"Browning, Timothy D., and Will Sawin. “A Geometric Version of the Circle Method.” Annals of Mathematics, vol. 191, no. 3, Princeton University, 2020, pp. 893–948, doi:10.4007/annals.2020.191.3.4.","apa":"Browning, T. D., & Sawin, W. (2020). A geometric version of the circle method. Annals of Mathematics. Princeton University. https://doi.org/10.4007/annals.2020.191.3.4","ama":"Browning TD, Sawin W. A geometric version of the circle method. Annals of Mathematics. 2020;191(3):893-948. doi:10.4007/annals.2020.191.3.4","chicago":"Browning, Timothy D, and Will Sawin. “A Geometric Version of the Circle Method.” Annals of Mathematics. Princeton University, 2020. https://doi.org/10.4007/annals.2020.191.3.4.","short":"T.D. Browning, W. Sawin, Annals of Mathematics 191 (2020) 893–948.","ista":"Browning TD, Sawin W. 2020. A geometric version of the circle method. Annals of Mathematics. 191(3), 893–948."},"date_published":"2020-05-01T00:00:00Z","language":[{"iso":"eng"}],"quality_controlled":"1","arxiv":1,"date_created":"2018-12-11T11:45:02Z","issue":"3","publication":"Annals of Mathematics","day":"01","abstract":[{"text":"We develop a geometric version of the circle method and use it to compute the compactly supported cohomology of the space of rational curves through a point on a smooth affine hypersurface of sufficiently low degree.","lang":"eng"}],"oa_version":"Preprint","publication_status":"published","scopus_import":"1","main_file_link":[{"open_access":"1","url":"https://arxiv.org/abs/1711.10451"}],"department":[{"_id":"TiBr"}],"title":"A geometric version of the circle method","author":[{"first_name":"Timothy D","id":"35827D50-F248-11E8-B48F-1D18A9856A87","last_name":"Browning","full_name":"Browning, Timothy D","orcid":"0000-0002-8314-0177"},{"last_name":"Sawin","full_name":"Sawin, Will","first_name":"Will"}],"external_id":{"arxiv":["1711.10451"],"isi":["000526986300004"]}},{"title":"Advantages of acute brain slices prepared at physiological temperature in the characterization of synaptic functions","department":[{"_id":"JoDa"},{"_id":"RySh"}],"tmp":{"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)","image":"/images/cc_by.png"},"file":[{"file_size":9227283,"content_type":"application/pdf","file_name":"2020_FrontiersCellularNeurosc_Eguchi.pdf","access_level":"open_access","relation":"main_file","date_updated":"2020-07-14T12:48:01Z","date_created":"2020-04-20T10:59:49Z","file_id":"7668","creator":"dernst","checksum":"1c145123c6f8dc3e2e4bd5a66a1ad60e"}],"external_id":{"isi":["000525582200001"],"pmid":["32265664"]},"author":[{"first_name":"Kohgaku","full_name":"Eguchi, Kohgaku","id":"2B7846DC-F248-11E8-B48F-1D18A9856A87","last_name":"Eguchi","orcid":"0000-0002-6170-2546"},{"orcid":"0000-0002-2340-7431","last_name":"Velicky","id":"39BDC62C-F248-11E8-B48F-1D18A9856A87","first_name":"Philipp","full_name":"Velicky, Philipp"},{"id":"3C054040-F248-11E8-B48F-1D18A9856A87","last_name":"Hollergschwandtner","first_name":"Elena","full_name":"Hollergschwandtner, Elena"},{"last_name":"Itakura","full_name":"Itakura, Makoto","first_name":"Makoto"},{"last_name":"Fukazawa","full_name":"Fukazawa, Yugo","first_name":"Yugo"},{"first_name":"Johann G","last_name":"Danzl","id":"42EFD3B6-F248-11E8-B48F-1D18A9856A87","full_name":"Danzl, Johann G","orcid":"0000-0001-8559-3973"},{"orcid":"0000-0001-8761-9444","id":"499F3ABC-F248-11E8-B48F-1D18A9856A87","first_name":"Ryuichi","last_name":"Shigemoto","full_name":"Shigemoto, Ryuichi"}],"oa_version":"Published Version","ec_funded":1,"abstract":[{"lang":"eng","text":"Acute brain slice preparation is a powerful experimental model for investigating the characteristics of synaptic function in the brain. Although brain tissue is usually cut at ice-cold temperature (CT) to facilitate slicing and avoid neuronal damage, exposure to CT causes molecular and architectural changes of synapses. To address these issues, we investigated ultrastructural and electrophysiological features of synapses in mouse acute cerebellar slices prepared at ice-cold and physiological temperature (PT). In the slices prepared at CT, we found significant spine loss and reconstruction, synaptic vesicle rearrangement and decrease in synaptic proteins, all of which were not detected in slices prepared at PT. Consistent with these structural findings, slices prepared at PT showed higher release probability. Furthermore, preparation at PT allows electrophysiological recording immediately after slicing resulting in higher detectability of long-term depression (LTD) after motor learning compared with that at CT. These results indicate substantial advantages of the slice preparation at PT for investigating synaptic functions in different physiological conditions."}],"ddc":["570"],"day":"19","project":[{"grant_number":"793482","call_identifier":"H2020","name":"Ultrastructural analysis of phosphoinositides in nerve terminals: distribution, dynamics and physiological roles in synaptic transmission","_id":"2659CC84-B435-11E9-9278-68D0E5697425"},{"_id":"25CA28EA-B435-11E9-9278-68D0E5697425","name":"In situ analysis of single channel subunit composition in neurons: physiological implication in synaptic plasticity and behaviour","call_identifier":"H2020","grant_number":"694539"},{"grant_number":"I03600","_id":"265CB4D0-B435-11E9-9278-68D0E5697425","call_identifier":"FWF","name":"Optical control of synaptic function via adhesion molecules"},{"_id":"B67AFEDC-15C9-11EA-A837-991A96BB2854","name":"IST Austria Open Access Fund"}],"publication":"Frontiers in Cellular Neuroscience","scopus_import":"1","corr_author":"1","publication_status":"published","has_accepted_license":"1","article_number":"63","date_published":"2020-03-19T00:00:00Z","file_date_updated":"2020-07-14T12:48:01Z","citation":{"ista":"Eguchi K, Velicky P, Saeckl E, Itakura M, Fukazawa Y, Danzl JG, Shigemoto R. 2020. Advantages of acute brain slices prepared at physiological temperature in the characterization of synaptic functions. Frontiers in Cellular Neuroscience. 14, 63.","short":"K. Eguchi, P. Velicky, E. Saeckl, M. Itakura, Y. Fukazawa, J.G. Danzl, R. Shigemoto, Frontiers in Cellular Neuroscience 14 (2020).","apa":"Eguchi, K., Velicky, P., Saeckl, E., Itakura, M., Fukazawa, Y., Danzl, J. G., & Shigemoto, R. (2020). Advantages of acute brain slices prepared at physiological temperature in the characterization of synaptic functions. Frontiers in Cellular Neuroscience. Frontiers Media. https://doi.org/10.3389/fncel.2020.00063","mla":"Eguchi, Kohgaku, et al. “Advantages of Acute Brain Slices Prepared at Physiological Temperature in the Characterization of Synaptic Functions.” Frontiers in Cellular Neuroscience, vol. 14, 63, Frontiers Media, 2020, doi:10.3389/fncel.2020.00063.","ieee":"K. Eguchi et al., “Advantages of acute brain slices prepared at physiological temperature in the characterization of synaptic functions,” Frontiers in Cellular Neuroscience, vol. 14. Frontiers Media, 2020.","chicago":"Eguchi, Kohgaku, Philipp Velicky, Elena Saeckl, Makoto Itakura, Yugo Fukazawa, Johann G Danzl, and Ryuichi Shigemoto. “Advantages of Acute Brain Slices Prepared at Physiological Temperature in the Characterization of Synaptic Functions.” Frontiers in Cellular Neuroscience. Frontiers Media, 2020. https://doi.org/10.3389/fncel.2020.00063.","ama":"Eguchi K, Velicky P, Saeckl E, et al. Advantages of acute brain slices prepared at physiological temperature in the characterization of synaptic functions. Frontiers in Cellular Neuroscience. 2020;14. doi:10.3389/fncel.2020.00063"},"oa":1,"volume":14,"article_processing_charge":"Yes (via OA deal)","month":"03","date_created":"2020-04-19T22:00:55Z","publication_identifier":{"issn":["1662-5102"]},"quality_controlled":"1","language":[{"iso":"eng"}],"pmid":1,"year":"2020","_id":"7665","user_id":"2DF688A6-F248-11E8-B48F-1D18A9856A87","isi":1,"article_type":"original","intvolume":" 14","date_updated":"2025-06-12T07:16:39Z","publisher":"Frontiers Media","status":"public","type":"journal_article","doi":"10.3389/fncel.2020.00063"},{"has_accepted_license":"1","publication_status":"published","corr_author":"1","scopus_import":"1","publication":"Discrete and Computational Geometry","project":[{"name":"IST Austria Open Access Fund","_id":"B67AFEDC-15C9-11EA-A837-991A96BB2854"},{"_id":"266A2E9E-B435-11E9-9278-68D0E5697425","name":"Alpha Shape Theory Extended","call_identifier":"H2020","grant_number":"788183"},{"grant_number":"I02979-N35","name":"Persistence and stability of geometric complexes","call_identifier":"FWF","_id":"2561EBF4-B435-11E9-9278-68D0E5697425"}],"abstract":[{"lang":"eng","text":"Generalizing the decomposition of a connected planar graph into a tree and a dual tree, we prove a combinatorial analog of the classic Helmholtz–Hodge decomposition of a smooth vector field. Specifically, we show that for every polyhedral complex, K, and every dimension, p, there is a partition of the set of p-cells into a maximal p-tree, a maximal p-cotree, and a collection of p-cells whose cardinality is the p-th reduced Betti number of K. Given an ordering of the p-cells, this tri-partition is unique, and it can be computed by a matrix reduction algorithm that also constructs canonical bases of cycle and boundary groups."}],"ddc":["510"],"day":"20","ec_funded":1,"oa_version":"Published Version","author":[{"full_name":"Edelsbrunner, Herbert","last_name":"Edelsbrunner","first_name":"Herbert","id":"3FB178DA-F248-11E8-B48F-1D18A9856A87","orcid":"0000-0002-9823-6833"},{"orcid":"0000-0002-4672-8297","last_name":"Ölsböck","full_name":"Ölsböck, Katharina","first_name":"Katharina","id":"4D4AA390-F248-11E8-B48F-1D18A9856A87"}],"external_id":{"isi":["000520918800001"]},"file":[{"file_size":701673,"content_type":"application/pdf","access_level":"open_access","date_updated":"2020-11-20T13:22:21Z","relation":"main_file","date_created":"2020-11-20T13:22:21Z","file_id":"8786","creator":"dernst","checksum":"f8cc96e497f00c38340b5dafe0cb91d7","success":1,"file_name":"2020_DiscreteCompGeo_Edelsbrunner.pdf"}],"department":[{"_id":"HeEd"}],"tmp":{"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)","image":"/images/cc_by.png"},"title":"Tri-partitions and bases of an ordered complex","doi":"10.1007/s00454-020-00188-x","acknowledgement":"This project has received funding from the European Research Council under the European Union’s Horizon 2020 research and innovation programme (Grant Agreement No. 78818 Alpha). It is also partially supported by the DFG Collaborative Research Center TRR 109, ‘Discretization in Geometry and Dynamics’, through Grant No. I02979-N35 of the Austrian Science Fund (FWF).","type":"journal_article","status":"public","publisher":"Springer Nature","date_updated":"2025-04-14T07:48:36Z","intvolume":" 64","article_type":"original","isi":1,"user_id":"4359f0d1-fa6c-11eb-b949-802e58b17ae8","page":"759-775","_id":"7666","year":"2020","language":[{"iso":"eng"}],"quality_controlled":"1","publication_identifier":{"issn":["01795376"],"eissn":["14320444"]},"date_created":"2020-04-19T22:00:56Z","article_processing_charge":"Yes (via OA deal)","volume":64,"month":"03","oa":1,"citation":{"short":"H. Edelsbrunner, K. Ölsböck, Discrete and Computational Geometry 64 (2020) 759–775.","ista":"Edelsbrunner H, Ölsböck K. 2020. Tri-partitions and bases of an ordered complex. Discrete and Computational Geometry. 64, 759–775.","mla":"Edelsbrunner, Herbert, and Katharina Ölsböck. “Tri-Partitions and Bases of an Ordered Complex.” Discrete and Computational Geometry, vol. 64, Springer Nature, 2020, pp. 759–75, doi:10.1007/s00454-020-00188-x.","ieee":"H. Edelsbrunner and K. Ölsböck, “Tri-partitions and bases of an ordered complex,” Discrete and Computational Geometry, vol. 64. Springer Nature, pp. 759–775, 2020.","apa":"Edelsbrunner, H., & Ölsböck, K. (2020). Tri-partitions and bases of an ordered complex. Discrete and Computational Geometry. Springer Nature. https://doi.org/10.1007/s00454-020-00188-x","ama":"Edelsbrunner H, Ölsböck K. Tri-partitions and bases of an ordered complex. Discrete and Computational Geometry. 2020;64:759-775. doi:10.1007/s00454-020-00188-x","chicago":"Edelsbrunner, Herbert, and Katharina Ölsböck. “Tri-Partitions and Bases of an Ordered Complex.” Discrete and Computational Geometry. Springer Nature, 2020. https://doi.org/10.1007/s00454-020-00188-x."},"file_date_updated":"2020-11-20T13:22:21Z","date_published":"2020-03-20T00:00:00Z"},{"acknowledgement":"S.A.F. thanks the International Society of Electrochemistry for awarding the Tajima Prize 2019 “in recognition of outstanding re- searches on Li-Air batteries by the use of a range of in-situ elec- trochemical methods to achieve comprehensive understanding of the reactions taking place at the oxygen electrode”. This article is dedicated to the special issue of Electrochmica Acta associated with the awarding conference. S.A.F. is indebted to and the Austrian Federal Ministry of Science, Research and Economy and the Austrian Research Promotion Agency (grant No. 845364 ) and the European Research Council (ERC) under the European Union’s Horizon 2020 research and innovation programme (grant agreement No 636069). The authors thank J. Schlegl for manufacturing instrumentation, M. Winkler of Acib GmbH and G. Strohmeier for help with HPLC measurements, S. Eder for cyclic voltammetry measurements, and C. Slugovc for discussions and continuous support. We thank S. Borisov for access and advice with fluorescence measurements. We thank EL-Cell GmbH, Hamburg, Germany for providing the PAT-Cell-Press electrochemical cell.","doi":"10.1016/j.electacta.2020.137175","type":"journal_article","status":"public","publisher":"Elsevier","date_updated":"2024-10-09T20:59:27Z","intvolume":" 362","article_type":"original","isi":1,"user_id":"4359f0d1-fa6c-11eb-b949-802e58b17ae8","_id":"7672","year":"2020","language":[{"iso":"eng"}],"quality_controlled":"1","date_created":"2020-04-20T19:29:31Z","article_processing_charge":"Yes (via OA deal)","month":"12","volume":362,"oa":1,"citation":{"apa":"Samojlov, A., Schuster, D., Kahr, J., & Freunberger, S. A. (2020). Surface and catalyst driven singlet oxygen formation in Li-O2 cells. Electrochimica Acta. Elsevier. https://doi.org/10.1016/j.electacta.2020.137175","mla":"Samojlov, Aleksej, et al. “Surface and Catalyst Driven Singlet Oxygen Formation in Li-O2 Cells.” Electrochimica Acta, vol. 362, no. 12, 137175, Elsevier, 2020, doi:10.1016/j.electacta.2020.137175.","ieee":"A. Samojlov, D. Schuster, J. Kahr, and S. A. Freunberger, “Surface and catalyst driven singlet oxygen formation in Li-O2 cells,” Electrochimica Acta, vol. 362, no. 12. Elsevier, 2020.","chicago":"Samojlov, Aleksej, David Schuster, Jürgen Kahr, and Stefan Alexander Freunberger. “Surface and Catalyst Driven Singlet Oxygen Formation in Li-O2 Cells.” Electrochimica Acta. Elsevier, 2020. https://doi.org/10.1016/j.electacta.2020.137175.","ama":"Samojlov A, Schuster D, Kahr J, Freunberger SA. Surface and catalyst driven singlet oxygen formation in Li-O2 cells. Electrochimica Acta. 2020;362(12). doi:10.1016/j.electacta.2020.137175","ista":"Samojlov A, Schuster D, Kahr J, Freunberger SA. 2020. Surface and catalyst driven singlet oxygen formation in Li-O2 cells. Electrochimica Acta. 362(12), 137175.","short":"A. Samojlov, D. Schuster, J. Kahr, S.A. Freunberger, Electrochimica Acta 362 (2020)."},"file_date_updated":"2020-10-01T13:20:45Z","date_published":"2020-12-01T00:00:00Z","article_number":"137175","has_accepted_license":"1","publication_status":"published","corr_author":"1","scopus_import":"1","issue":"12","publication":"Electrochimica Acta","ddc":["540"],"abstract":[{"lang":"eng","text":"Large overpotentials upon discharge and charge of Li-O2 cells have motivated extensive research into heterogeneous solid electrocatalysts or non-carbon electrodes with the aim to improve rate capability, round-trip efficiency and cycle life. These features are equally governed by parasitic reactions, which are now recognized to be caused by the highly reactive singlet oxygen (1O2). However, the link between the presence of electrocatalysts and 1O2 formation in metal-O2 cells is unknown. Here, we show that, compared to pristine carbon black electrodes, a representative selection of electrocatalysts or non-carbon electrodes (noble metal, transition metal compounds) may both slightly reduce or severely increase the 1O2 formation. The individual reaction steps, where the surfaces impact the 1O2 yield are deciphered, showing that 1O2 yield from superoxide disproportionation as well as the decomposition of trace H2O2 are sensitive to catalysts. Transition metal compounds in general are prone to increase 1O2."}],"day":"01","oa_version":"Published Version","author":[{"last_name":"Samojlov","full_name":"Samojlov, Aleksej","first_name":"Aleksej"},{"full_name":"Schuster, David","last_name":"Schuster","first_name":"David"},{"first_name":"Jürgen","full_name":"Kahr, Jürgen","last_name":"Kahr"},{"orcid":"0000-0003-2902-5319","id":"A8CA28E6-CE23-11E9-AD2D-EC27E6697425","first_name":"Stefan Alexander","last_name":"Freunberger","full_name":"Freunberger, Stefan Alexander"}],"external_id":{"isi":["000582869700060"]},"file":[{"date_updated":"2020-10-01T13:20:45Z","relation":"main_file","access_level":"open_access","date_created":"2020-10-01T13:20:45Z","checksum":"1ab1aa2024d431e2a089ea336bc08298","file_id":"8593","creator":"dernst","success":1,"file_name":"2020_ElectrochimicaActa_Samojlov.pdf","file_size":1404030,"content_type":"application/pdf"}],"department":[{"_id":"StFr"}],"tmp":{"legal_code_url":"https://creativecommons.org/licenses/by-nc-nd/4.0/legalcode","name":"Creative Commons Attribution-NonCommercial-NoDerivatives 4.0 International (CC BY-NC-ND 4.0)","short":"CC BY-NC-ND (4.0)","image":"/images/cc_by_nc_nd.png"},"title":"Surface and catalyst driven singlet oxygen formation in Li-O2 cells"},{"publisher":"Springer Nature","type":"journal_article","status":"public","date_updated":"2025-05-20T10:38:32Z","intvolume":" 26","doi":"10.1007/s00029-020-00553-x","_id":"7683","year":"2020","article_type":"original","isi":1,"user_id":"9947682f-b9fa-11ee-9c4a-b3ffaafe6614","date_created":"2020-04-26T22:00:44Z","arxiv":1,"language":[{"iso":"eng"}],"quality_controlled":"1","publication_identifier":{"issn":["1022-1824"],"eissn":["1420-9020"]},"file_date_updated":"2020-07-14T12:48:02Z","date_published":"2020-04-15T00:00:00Z","volume":26,"article_processing_charge":"Yes (via OA deal)","month":"04","oa":1,"citation":{"short":"S. Minets, Selecta Mathematica, New Series 26 (2020).","ista":"Minets S. 2020. Cohomological Hall algebras for Higgs torsion sheaves, moduli of triples and sheaves on surfaces. Selecta Mathematica, New Series. 26(2), 30.","ieee":"S. Minets, “Cohomological Hall algebras for Higgs torsion sheaves, moduli of triples and sheaves on surfaces,” Selecta Mathematica, New Series, vol. 26, no. 2. Springer Nature, 2020.","mla":"Minets, Sasha. “Cohomological Hall Algebras for Higgs Torsion Sheaves, Moduli of Triples and Sheaves on Surfaces.” Selecta Mathematica, New Series, vol. 26, no. 2, 30, Springer Nature, 2020, doi:10.1007/s00029-020-00553-x.","apa":"Minets, S. (2020). Cohomological Hall algebras for Higgs torsion sheaves, moduli of triples and sheaves on surfaces. Selecta Mathematica, New Series. Springer Nature. https://doi.org/10.1007/s00029-020-00553-x","ama":"Minets S. Cohomological Hall algebras for Higgs torsion sheaves, moduli of triples and sheaves on surfaces. Selecta Mathematica, New Series. 2020;26(2). doi:10.1007/s00029-020-00553-x","chicago":"Minets, Sasha. “Cohomological Hall Algebras for Higgs Torsion Sheaves, Moduli of Triples and Sheaves on Surfaces.” Selecta Mathematica, New Series. Springer Nature, 2020. https://doi.org/10.1007/s00029-020-00553-x."},"publication_status":"published","corr_author":"1","scopus_import":"1","article_number":"30","has_accepted_license":"1","oa_version":"Published Version","publication":"Selecta Mathematica, New Series","issue":"2","project":[{"_id":"B67AFEDC-15C9-11EA-A837-991A96BB2854","name":"IST Austria Open Access Fund"}],"ddc":["510"],"abstract":[{"lang":"eng","text":"For any free oriented Borel–Moore homology theory A, we construct an associative product on the A-theory of the stack of Higgs torsion sheaves over a projective curve C. We show that the resulting algebra AHa0C admits a natural shuffle presentation, and prove it is faithful when A is replaced with usual Borel–Moore homology groups. We also introduce moduli spaces of stable triples, heavily inspired by Nakajima quiver varieties, whose A-theory admits an AHa0C-action. These triples can be interpreted as certain sheaves on PC(ωC⊕OC). In particular, we obtain an action of AHa0C on the cohomology of Hilbert schemes of points on T∗C."}],"day":"15","external_id":{"isi":["000526036400001"],"arxiv":["1801.01429"]},"author":[{"first_name":"Sasha","full_name":"Minets, Sasha","id":"3E7C5304-F248-11E8-B48F-1D18A9856A87","last_name":"Minets","orcid":"0000-0003-3883-1806"}],"title":"Cohomological Hall algebras for Higgs torsion sheaves, moduli of triples and sheaves on surfaces","file":[{"file_size":792469,"content_type":"application/pdf","access_level":"open_access","relation":"main_file","date_updated":"2020-07-14T12:48:02Z","date_created":"2020-04-28T10:57:58Z","creator":"dernst","file_id":"7690","checksum":"2368c4662629b4759295eb365323b2ad","file_name":"2020_SelectaMathematica_Minets.pdf"}],"department":[{"_id":"TaHa"}],"tmp":{"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)","image":"/images/cc_by.png"}}]