X-ray constraints on the fraction of obscured active galactic nuclei at high accretion luminosities

doi:10.1093/mnras/stx953

	X-ray constraints on the fraction of obscured active galactic nuclei at high accretion luminosities
	Ananna, T. Tasnim 7; Schulze, A.1,6; Shen, Yue 4,5; LaMassa, S.4; Nandra, K.16; Merloni, A.16; Brandt, W. N.8,9,10; Liu, Z.13,14 ; Salvato, M.16; Georgakakis, A.15,16
刊名	MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY
	2017-08-01
卷号	469 期号:3 页码:3232-3251
关键词	Galaxies: Active Quasars: General Quasars: Supermassive Black Holes Galaxies: Seyfert X-rays: Diffuse Background
DOI	10.1093/mnras/stx953
文献子类	Article
英文摘要	The wide-area XMM-XXL X-ray survey is used to explore the fraction of obscured active galactic nuclei (AGNs) at high accretion luminosities, L-X(2-10 keV) greater than or similar to 10(44) erg s(-1), and out to redshift z approximate to 1.5. The sample covers an area of about 14 deg(2) and provides constraints on the space density of powerful AGNs over a wide range of neutral hydrogen column densities extending beyond the Compton-thick limit, N-H approximate to 10(24) cm(-2). The fraction of obscured Compton-thin (N-H = 10(22) - 10(24) cm(-2)) AGNs is estimated to be approximate to 0.35 for luminosities L-X(2-10 keV) > 10(44) erg s(-1), independent of redshift. For less luminous sources, the fraction of obscured Compton-thin AGNs increases from 0.45 +/- 0.10 at z = 0.25 to 0.75 +/- 0.05 at z = 1.25. Studies that select AGNs in the infrared via template fits to the observed spectral energy distribution of extragalactic sources estimate space densities at high accretion luminosities consistent with the XMM-XXL constraints. There is no evidence for a large population of AGNs (e.g. heavily obscured) identified in the infrared and missed at X-ray wavelengths. We further explore the mid-infrared colours of XMM-XXL AGNs as a function of accretion luminosity, column density and redshift. The fraction of XMM-XXL sources that lie within the mid-infrared colour wedges defined in the literature to select AGNs is primarily a function of redshift. This fraction increases from about 20-30 per cent at z = 0.25 to about 50-70 per cent at z = 1.5.
WOS关键词	ABSORPTION-LINE QUASARS ; DIGITAL SKY SURVEY ; SUPERMASSIVE BLACK-HOLES ; STAR-FORMING GALAXIES ; DEEP FIELD-SOUTH ; POINT-SOURCE CATALOG ; NUSTAR EXTRAGALACTIC SURVEY ; TELESCOPE LENSING SURVEY ; PHOTON IMAGING CAMERA ; COMPTON-THICK AGN
WOS研究方向	Astronomy & Astrophysics
语种	英语
WOS记录号	WOS:000406836200050
资助机构	THALES - European Union(383549) ; THALES - European Union(383549) ; Greek Government of the programme 'Education and lifelong learning' ; Greek Government of the programme 'Education and lifelong learning' ; FONDECYT Postdoctorados(3160439) ; FONDECYT Postdoctorados(3160439) ; Ministry of Economy, Development, and Tourism's Millennium Science Initiative(IC120009) ; Ministry of Economy, Development, and Tourism's Millennium Science Initiative(IC120009) ; Millennium Institute of Astro-physics MAS ; Millennium Institute of Astro-physics MAS ; Alfred P. Sloan Foundation ; Alfred P. Sloan Foundation ; National Science Foundation ; National Science Foundation ; U.S. Department of Energy Office of Science ; U.S. Department of Energy Office of Science ; University of Arizona ; University of Arizona ; Brazilian Participation Group ; Brazilian Participation Group ; Brookhaven National Laboratory ; Brookhaven National Laboratory ; Carnegie Mellon University ; Carnegie Mellon University ; University of Florida ; University of Florida ; French Participation Group ; French Participation Group ; German Participation Group ; German Participation Group ; Harvard University ; Harvard University ; Instituto de Astrofisica de Canarias ; Instituto de Astrofisica de Canarias ; Michigan State/Notre Dame/JINA Participation Group ; Michigan State/Notre Dame/JINA Participation Group ; Johns Hopkins University ; Johns Hopkins University ; Lawrence Berkeley National Laboratory ; Lawrence Berkeley National Laboratory ; Max Planck Institute for Astrophysics ; Max Planck Institute for Astrophysics ; Max Planck Institute for Extraterrestrial Physics ; Max Planck Institute for Extraterrestrial Physics ; New Mexico State University ; New Mexico State University ; New York University ; New York University ; Ohio State University ; Ohio State University ; Pennsylvania State University ; Pennsylvania State University ; University of Portsmouth ; University of Portsmouth ; Princeton University ; Princeton University ; Spanish Participation Group ; Spanish Participation Group ; University of Tokyo ; University of Tokyo ; University of Utah ; University of Utah ; Vanderbilt University ; Vanderbilt University ; University of Virginia ; University of Virginia ; University of Washington ; University of Washington ; Yale University ; Yale University ; THALES - European Union(383549) ; THALES - European Union(383549) ; Greek Government of the programme 'Education and lifelong learning' ; Greek Government of the programme 'Education and lifelong learning' ; FONDECYT Postdoctorados(3160439) ; FONDECYT Postdoctorados(3160439) ; Ministry of Economy, Development, and Tourism's Millennium Science Initiative(IC120009) ; Ministry of Economy, Development, and Tourism's Millennium Science Initiative(IC120009) ; Millennium Institute of Astro-physics MAS ; Millennium Institute of Astro-physics MAS ; Alfred P. Sloan Foundation ; Alfred P. Sloan Foundation ; National Science Foundation ; National Science Foundation ; U.S. Department of Energy Office of Science ; U.S. Department of Energy Office of Science ; University of Arizona ; University of Arizona ; Brazilian Participation Group ; Brazilian Participation Group ; Brookhaven National Laboratory ; Brookhaven National Laboratory ; Carnegie Mellon University ; Carnegie Mellon University ; University of Florida ; University of Florida ; French Participation Group ; French Participation Group ; German Participation Group ; German Participation Group ; Harvard University ; Harvard University ; Instituto de Astrofisica de Canarias ; Instituto de Astrofisica de Canarias ; Michigan State/Notre Dame/JINA Participation Group ; Michigan State/Notre Dame/JINA Participation Group ; Johns Hopkins University ; Johns Hopkins University ; Lawrence Berkeley National Laboratory ; Lawrence Berkeley National Laboratory ; Max Planck Institute for Astrophysics ; Max Planck Institute for Astrophysics ; Max Planck Institute for Extraterrestrial Physics ; Max Planck Institute for Extraterrestrial Physics ; New Mexico State University ; New Mexico State University ; New York University ; New York University ; Ohio State University ; Ohio State University ; Pennsylvania State University ; Pennsylvania State University ; University of Portsmouth ; University of Portsmouth ; Princeton University ; Princeton University ; Spanish Participation Group ; Spanish Participation Group ; University of Tokyo ; University of Tokyo ; University of Utah ; University of Utah ; Vanderbilt University ; Vanderbilt University ; University of Virginia ; University of Virginia ; University of Washington ; University of Washington ; Yale University ; Yale University
内容类型	期刊论文
源URL	[http://ir.bao.ac.cn/handle/114a11/20060]
专题	国家天文台_星系宇宙学研究部
作者单位	1.Univ Tokyo, Kavli IPMU WPI, UTIAS, Kashiwa, Chiba 2778583, Japan 2.Univ Arizona, Steward Observ, 933 North Cherry Ave, Tucson, AZ 85721 USA 3.NASA, Goddard Space Flight Ctr, Greenbelt, MD 20771 USA 4.Univ Illinois, Natl Ctr Supercomp Applicat, Urbana, IL 61801 USA 5.Univ Illinois, Dept Astron, Urbana, IL 61801 USA 6.Natl Astron Observ Japan, Mitaka, Tokyo 1818588, Japan 7.Yale Univ, Dept Phys, POB 208120, New Haven, CT 06520 USA 8.Penn State Univ, Dept Phys, 104 Davey Lab, University Pk, PA 16802 USA 9.Penn State Univ, Inst Gravitat & Cosmos, University Pk, PA 16802 USA 10.Penn State Univ, Dept Astron & Astrophys, 525 Davey Lab, University Pk, PA 16802 USA
推荐引用方式 GB/T 7714	Ananna, T. Tasnim,Schulze, A.,Shen, Yue,et al. X-ray constraints on the fraction of obscured active galactic nuclei at high accretion luminosities[J]. MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY,2017,469(3):3232-3251.
APA	Ananna, T. Tasnim.,Schulze, A..,Shen, Yue.,LaMassa, S..,Nandra, K..,...&McGreer, I. D..(2017).X-ray constraints on the fraction of obscured active galactic nuclei at high accretion luminosities.MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY,469(3),3232-3251.
MLA	Ananna, T. Tasnim,et al."X-ray constraints on the fraction of obscured active galactic nuclei at high accretion luminosities".MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY 469.3(2017):3232-3251.