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• W1725534549 endingPage "120" @default.
• W1725534549 startingPage "110" @default.
• W1725534549 abstract "We constrain the number density and evolution of Compton-thick Active Galactic Nuclei (AGN). In the local Universe we use the wide area surveys from the Swift and INTEGRAL satellites, while for high redshifts we explore candidate selections based on a combination of X-ray and mid-IR parameters. We find a significantly lower space density of Compton-thick AGN in the local Universe than expected from published AGN population synthesis models to explain the X-ray background. This can be explained by the numerous degeneracies in the parameters of those models; we use the high-energy surveys described here to remove those degeneracies. We show that only direct observations of CT AGN can currently constrain the number of heavily-obscured supermassive black holes. At high redshift, the inclusion of IR-selected Compton-thick AGN candidates leads to a much higher space density, implying (a) a different (steeper) evolution for these sources compared to less-obscured AGN, (b) that the IR selection includes a large number of interlopers, and/or (c) that there is a large number of reflection-dominated AGN missed in the INTEGRAL and Swift observations. The contribution of CT AGN to the X-ray background is small, ~9%, with a comparable contribution to the total cosmic accretion, unless reflection-dominated CT AGN significantly outnumber transmission-dominated CT AGN, in which case their contribution can be much higher. Using estimates derived here for the accretion luminosity over cosmic time we estimate the local mass density in supermassive black holes and find a good agreement with available constraints for an accretion efficiency of ~10%. Transmission-dominated CT AGN contribute only ~8% to total black hole growth." @default.
• W1725534549 created "2016-06-24" @default.
• W1725534549 creator A5006269247 @default.
• W1725534549 creator A5062103202 @default.
• W1725534549 creator A5070191530 @default.
• W1725534549 date "2009-04-13" @default.
• W1725534549 modified "2023-10-03" @default.
• W1725534549 title "THE SPACE DENSITY OF COMPTON-THICK ACTIVE GALACTIC NUCLEUS AND THE X-RAY BACKGROUND" @default.
• W1725534549 cites W1489275076 @default.
• W1725534549 cites W1844333606 @default.
• W1725534549 cites W1853411141 @default.
• W1725534549 cites W1920267077 @default.
• W1725534549 cites W1965134192 @default.
• W1725534549 cites W1972308849 @default.
• W1725534549 cites W1974849479 @default.
• W1725534549 cites W1976615408 @default.
• W1725534549 cites W1988002154 @default.
• W1725534549 cites W1994619117 @default.
• W1725534549 cites W1997106536 @default.
• W1725534549 cites W1999193551 @default.
• W1725534549 cites W2001545787 @default.
• W1725534549 cites W2001666843 @default.
• W1725534549 cites W2010671365 @default.
• W1725534549 cites W2011881697 @default.
• W1725534549 cites W2016121098 @default.
• W1725534549 cites W2019255908 @default.
• W1725534549 cites W2020955343 @default.
• W1725534549 cites W2022862485 @default.
• W1725534549 cites W2024128534 @default.
• W1725534549 cites W2025338816 @default.
• W1725534549 cites W2026082409 @default.
• W1725534549 cites W2031098172 @default.
• W1725534549 cites W2033312766 @default.
• W1725534549 cites W2033474129 @default.
• W1725534549 cites W2036319176 @default.
• W1725534549 cites W2044460462 @default.
• W1725534549 cites W2047973283 @default.
• W1725534549 cites W2048316219 @default.
• W1725534549 cites W2054131667 @default.
• W1725534549 cites W2062976911 @default.
• W1725534549 cites W2071840305 @default.
• W1725534549 cites W2074408355 @default.
• W1725534549 cites W2075443084 @default.
• W1725534549 cites W2076866511 @default.
• W1725534549 cites W2083481765 @default.
• W1725534549 cites W2086105458 @default.
• W1725534549 cites W2088375762 @default.
• W1725534549 cites W2101466017 @default.
• W1725534549 cites W2103705762 @default.
• W1725534549 cites W2121569158 @default.
• W1725534549 cites W2127984363 @default.
• W1725534549 cites W2136749628 @default.
• W1725534549 cites W2142506421 @default.
• W1725534549 cites W2147040512 @default.
• W1725534549 cites W2148005318 @default.
• W1725534549 cites W2152505756 @default.
• W1725534549 cites W2153931839 @default.
• W1725534549 cites W2154748230 @default.
• W1725534549 cites W2159179033 @default.
• W1725534549 cites W2160669535 @default.
• W1725534549 cites W2163530473 @default.
• W1725534549 cites W2163765120 @default.
• W1725534549 cites W2165359624 @default.
• W1725534549 cites W2169204353 @default.
• W1725534549 cites W2194080530 @default.
• W1725534549 cites W3022265438 @default.
• W1725534549 cites W3098208149 @default.
• W1725534549 cites W3098575376 @default.
• W1725534549 cites W3098975407 @default.
• W1725534549 cites W3098984147 @default.
• W1725534549 cites W3099428329 @default.
• W1725534549 cites W3100906650 @default.
• W1725534549 cites W3102276385 @default.
• W1725534549 cites W3103020289 @default.
• W1725534549 cites W3103976676 @default.
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• W1725534549 doi "https://doi.org/10.1088/0004-637x/696/1/110" @default.
• W1725534549 hasPublicationYear "2009" @default.
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