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Unveiling slim accretion disc in AGN through X-ray and infrared observations
Castello-Mor, Nuria1; Kaspi, Shai1,2; Netzer, Hagai1; Du, Pu3; Hu, Chen3; Ho, Luis C.4,5; Bai JM(白金明)6; Bian, Wei-Hao7; Yuan, Ye-Fei8; Wang, Jian-Min3,9
Source PublicationMONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY
2017-05-01
Volume467Issue:1Pages:1209-1221
DOI10.1093/mnras/stx153
Contribution Rank第6完成单位
Indexed BySCI
KeywordAccretion Accretion Discs Galaxies: Active
Abstract

In this work, which is a continuation of Castello-Mor et al., we present new X-ray and infrared (IR) data for a sample of active galactic nuclei (AGN) covering a wide range in Eddington ratio over a small luminosity range. In particular, we rigorously explore the dependence of the optical-to-X-ray spectral index alpha(OX) and the IR-to-optical spectral index on the dimensionless accretion rate, M = m/eta, where m = L-AGN/L-Edd and eta is the mass-to-radiation conversion efficiency, in low-and high-accretion rate sources. We find that the spectral energy distribution (SED) of the faster accreting sources is surprisingly similar to those from the comparison sample of sources with lower accretion rate. In particular: (i) The optical-to-UV AGN SED of slow and fast accreting AGN can be fitted with thin accretion disc (AD) models. (ii) The value of alpha(OX) is very similar in slow and fast accreting systems up to a dimensionless accretion rate M-c similar to 10. We only find a correlation between alpha(OX) and M for sources with M > Mc. In such cases, the faster accreting sources appear to have systematically larger aOX values. (iii) We also find that the torus in the faster accreting systems seems to be less efficient in reprocessing the primary AGN radiation having lower IR-to-optical spectral slopes. These findings, failing to recover the predicted differences between the SEDs of slim and thin ADs within the observed spectral window, suggest that additional physical processes or very special geometry act to reduce the extreme-UV radiation in fast accreting AGN. This may be related to photon trapping, strong winds and perhaps other yet unknown physical processes.

Funding ProjectIsrael Science Foundation (ISF)[83/13] ; National Science Foundation Committee (NSFC) ; ISSI ; Chinese Academy of Science[XDB09030102] ; National Natural Science Foundation of China[11473002] ; Ministry of Science and Technology of China[2016YFA0400702] ; National Science Foundations of China[11373024] ; ISF-NSFC[83/13]
Funding OrganizationIsrael Science Foundation (ISF)[83/13] ; National Science Foundation Committee (NSFC) ; ISSI ; Chinese Academy of Science[XDB09030102] ; National Natural Science Foundation of China[11473002] ; Ministry of Science and Technology of China[2016YFA0400702] ; National Science Foundations of China[11373024] ; ISF-NSFC[83/13]
Language英语
Subject Area天文学 ; 天体物理学 ; 高能天体物理学
MOST Discipline Catalogue理学 ; 理学::天文学
SubtypeArticle
PublisherOXFORD UNIV PRESS
Publication PlaceGREAT CLARENDON ST, OXFORD OX2 6DP, ENGLAND
ISSN0035-8711
URL查看原文
WOS IDWOS:000398418900086
WOS Research AreaAstronomy & Astrophysics
WOS SubjectAstronomy & Astrophysics
WOS KeywordACTIVE GALACTIC NUCLEI ; SPECTRAL ENERGY-DISTRIBUTION ; SUPER-EDDINGTON ACCRETION ; SUPERMASSIVE BLACK-HOLES ; SEYFERT 1 GALAXIES ; RADIUS-LUMINOSITY RELATIONSHIP ; BRIGHT SERENDIPITOUS SURVEY ; RATES ; EMISSION ; SAMPLE
Citation statistics
Document Type期刊论文
Identifierhttp://ir.ynao.ac.cn/handle/114a53/10029
Collection丽江天文观测站(南方基地)
Corresponding AuthorCastello-Mor, Nuria; Kaspi, Shai; Netzer, Hagai
Affiliation1.School of Physics and Astronomy, Tel Aviv University, Tel Aviv 69978, Israel
2.Wise Observatory, School of Physics and Astronomy, Tel Aviv University, Tel Aviv 69978, Israel
3.Key Laboratory for Particle Astrophysics, Institute of High Energy Physics, Chinese Academy of Sciences, 19B Yuquan Road, Beijing 100049, China
4.Kavli Institute for Astronomy and Astrophysics, Peking University, Beijing 100871, China
5.Department of Astronomy, School of Physics, Peking University, Beijing 100871, China
6.Yunnan Observatories, Chinese Academy of Sciences, Kunming 650011, China
7.Physics Department, Nanjing Normal University, Nanjing 210097, China
8.Department of Astronomy, University of Science and Technology of China, Hefei 230026, China
9.National Astronomical Observatories of China, Chinese Academy of Sciences, 20A Datun Road, Beijing 100020, China
Recommended Citation
GB/T 7714
Castello-Mor, Nuria,Kaspi, Shai,Netzer, Hagai,et al. Unveiling slim accretion disc in AGN through X-ray and infrared observations[J]. MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY,2017,467(1):1209-1221.
APA Castello-Mor, Nuria.,Kaspi, Shai.,Netzer, Hagai.,Du, Pu.,Hu, Chen.,...&Wang, Jian-Min.(2017).Unveiling slim accretion disc in AGN through X-ray and infrared observations.MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY,467(1),1209-1221.
MLA Castello-Mor, Nuria,et al."Unveiling slim accretion disc in AGN through X-ray and infrared observations".MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY 467.1(2017):1209-1221.
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