dc.contributor.author | Tasnim Ananna, Tonima | |
dc.contributor.author | Treister, Ezequiel | |
dc.contributor.author | Urry, C. Megan | |
dc.contributor.author | Ricci, C. | |
dc.contributor.author | Kirkpatrick, Allison | |
dc.contributor.author | LaMassa, Stephanie | |
dc.contributor.author | Buchner, Johannes | |
dc.contributor.author | Civano, Francesca | |
dc.contributor.author | Tremmel, Michael | |
dc.contributor.author | Marchesi, Stefano | |
dc.date.accessioned | 2020-12-23T21:17:00Z | |
dc.date.available | 2020-12-23T21:17:00Z | |
dc.date.issued | 2019-02-05 | |
dc.identifier.citation | Tonima Tasnim Ananna et al 2019 ApJ 871 240 | en_US |
dc.identifier.uri | http://hdl.handle.net/1808/31011 | |
dc.description.abstract | As matter accretes onto the central supermassive black holes in active galactic nuclei (AGNs), X-rays are emitted. We present a population synthesis model that accounts for the summed X-ray emission from growing black holes; modulo the efficiency of converting mass to X-rays, this is effectively a record of the accreted mass. We need this population synthesis model to reproduce observed constraints from X-ray surveys: the X-ray number counts, the observed fraction of Compton-thick AGNs [log (N H/cm−2) > 24], and the spectrum of the cosmic X-ray background (CXB), after accounting for selection biases. Over the past decade, X-ray surveys by XMM-Newton, Chandra, NuSTAR, and Swift-BAT have provided greatly improved observational constraints. We find that no existing X-ray luminosity function (XLF) consistently reproduces all these observations. We take the uncertainty in AGN spectra into account and use a neural network to compute an XLF that fits all observed constraints, including observed Compton-thick number counts and fractions. This new population synthesis model suggests that, intrinsically, 50% ± 9% (56% ± 7%) of all AGNs within z sime 0.1 (1.0) are Compton-thick. | en_US |
dc.publisher | American Astronomical Society | en_US |
dc.rights | © 2019. The American Astronomical Society. All rights reserved. | en_US |
dc.subject | Galaxies: active | en_US |
dc.subject | Galaxy: center | en_US |
dc.subject | Galaxy: evolution | en_US |
dc.subject | Methods: data analysis | en_US |
dc.subject | Quasars: supermassive black holes | en_US |
dc.subject | X-rays: diffuse background | en_US |
dc.title | The Accretion History of AGNs. I. Supermassive Black Hole Population Synthesis Model | en_US |
dc.type | Article | en_US |
kusw.kuauthor | Kirkpatrick, Allison | |
kusw.kudepartment | Physics and Astronomy | en_US |
dc.identifier.doi | 10.3847/1538-4357/aafb77 | en_US |
dc.identifier.orcid | https://orcid.org/0000-0001-8211-3807 | en_US |
dc.identifier.orcid | https://orcid.org/0000-0001-7568-6412 | en_US |
dc.identifier.orcid | https://orcid.org/0000-0002-0745-9792 | en_US |
dc.identifier.orcid | https://orcid.org/0000-0001-5231-2645 | en_US |
dc.identifier.orcid | https://orcid.org/0000-0002-1306-1545 | en_US |
dc.identifier.orcid | https://orcid.org/0000-0002-5907-3330 | en_US |
dc.identifier.orcid | https://orcid.org/0000-0003-0426-6634 | en_US |
dc.identifier.orcid | https://orcid.org/0000-0001-5544-0749 | en_US |
kusw.oaversion | Scholarly/refereed, publisher version | en_US |
kusw.oapolicy | This item meets KU Open Access policy criteria. | en_US |
dc.rights.accessrights | openAccess | en_US |