Interaction of the accretion flows in corona and disk near the black hole in active galactic nuclei

doi:10.1051/0004-6361/201731105

CORC > 国家天文台 > 中国科学院国家天文台

	Interaction of the accretion flows in corona and disk near the black hole in active galactic nuclei
	Meyer-Hofmeister, E.2; Liu, B. F.1,3; Qiao, E.1,3
刊名	ASTRONOMY & ASTROPHYSICS
	2017-11-20
卷号	607 页码:7
关键词	accretion, accretion disks X-rays: binaries X-rays: galaxies galaxies: Seyfert quasars: individual: Mrk 335
ISSN号	1432-0746
DOI	10.1051/0004-6361/201731105
英文摘要	Context. Accretion flows toward black holes can be of a quite different nature, described as an optically thick cool gas flow in a disk for high accretion rates or as a hot coronal optically thin gas flow for low accretion rates, possibly affected by outflowing gas. Aims. The detection of broad iron emission lines in active galactic nuclei (AGN) indicates the coexistence of corona and disk. The appearance and relative strength of such flows essentially depends on their interaction. Liu et al. suggested that condensation of gas from the corona to the disk allows to understand accretion flows of comparable strength of emission. Matter inflow due to gravitational capture of gas is important for the condensation process. We discuss observational features predicted by the model. Methods. Data from simultaneous observations of AGN with Swift's X-ray and UV-optical telescopes are compared with the theoretical predictions. Results. The frequent detection of broad iron K-alpha emission lines and the dependence of the emitted spectra on the Eddington ratio, described by the values of the photon index and the two-point spectral index alpha(ox) are in approximate agreement with the predictions of the condensation model; the latter, however, with a large scatter. The model further yields a coronal emission concentrated in a narrow inner region as is also deduced from the analysis of emissivity profiles. Conclusions. The accretion flows in bright AGN could be described by the accretion of stellar wind or interstellar medium and its condensation into a thin disk.
资助项目	National Program on Key Research and Development Project[2016YFA0400804] ; National Natural Science Foundation of China[11673026]
WOS关键词	ADVECTION-DOMINATED ACCRETION ; X-RAY-SPECTRA ; RECONNECTION-HEATED CORONA ; INNER COOL DISKS ; BROAD IRON LINES ; LOW-HARD STATE ; SEYFERT-GALAXIES ; 1H 0707-495 ; EXTREME VARIABILITY ; MRK 335
WOS研究方向	Astronomy & Astrophysics
语种	英语
出版者	EDP SCIENCES S A
WOS记录号	WOS:000415859600003
资助机构	National Program on Key Research and Development Project ; National Program on Key Research and Development Project ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; National Program on Key Research and Development Project ; National Program on Key Research and Development Project ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; National Program on Key Research and Development Project ; National Program on Key Research and Development Project ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; National Program on Key Research and Development Project ; National Program on Key Research and Development Project ; National Natural Science Foundation of China ; National Natural Science Foundation of China
内容类型	期刊论文
源URL	[http://ir.bao.ac.cn/handle/114a11/37326]
专题	中国科学院国家天文台
通讯作者	Meyer-Hofmeister, E.
作者单位	1.Univ Chinese Acad Sci, Sch Astron & Space Sci, 19A Yuquan Rd, Beijing 100049, Peoples R China 2.Max Planck Inst Astrophys, Karl Schwarzschildstr 1, D-85740 Garching, Germany 3.Chinese Acad Sci, Natl Astron Observ, Key Lab Space Astron & Technol, Beijing 100012, Peoples R China
推荐引用方式 GB/T 7714	Meyer-Hofmeister, E.,Liu, B. F.,Qiao, E.. Interaction of the accretion flows in corona and disk near the black hole in active galactic nuclei[J]. ASTRONOMY & ASTROPHYSICS,2017,607:7.
APA	Meyer-Hofmeister, E.,Liu, B. F.,&Qiao, E..(2017).Interaction of the accretion flows in corona and disk near the black hole in active galactic nuclei.ASTRONOMY & ASTROPHYSICS,607,7.
MLA	Meyer-Hofmeister, E.,et al."Interaction of the accretion flows in corona and disk near the black hole in active galactic nuclei".ASTRONOMY & ASTROPHYSICS 607(2017):7.