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The condensation of the corona for the correlation between the hard X-ray photon index Gamma and the reflection scaling factor R in active galactic nuclei
Qiao, Erlin1,2; Liu, B. F.1,2
2017-05-01
发表期刊MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY
卷号467期号:1页码:898-905
摘要Observationally, it is found that there is a strong correlation between the hard X-ray photon index Gamma and the Compton reflection scaling factor R in active galactic nuclei. In this paper, we propose that the Gamma -R correlation can be explained within the framework of the condensation of the hot corona on to the cold accretion disc around a supermassive black hole. In the model, it is presumed that, initially, a vertically extended hot gas (corona) is supplied to the central supermassive black hole by capturing the interstellarmedium and stellar wind. In this scenario, when the initial mass accretion rate. M/M-Edd greater than or similar to 0.01, at a critical radius r(d), part of the hot gas begins to condense on to the equatorial disc plane of the black hole, forming an inner cold accretion disc. Then, the matter is accreted in the form of a disc-corona structure extending down to the innermost stable circular orbits of the black hole. The size of the inner disc is determined by the initial mass accretion rate. With the increase of the initial mass accretion rate, the size of the inner disc increases, which results in both the increase of the Compton reflection scaling factor Gamma and the increase of the hard X-ray photon index Gamma. By comparing with a sample of Seyfert galaxies with well-fitted X-ray spectra, it is found that our model can roughly explain the observations. Finally, we discuss the possibility of applying our model to high-mass X-ray binaries, which are believed to be fuelled by hot winds from the companion stars.
文章类型Article
关键词Black Hole Physics Accretion Galaxies: Active Accretion Discs
WOS标题词Science & Technology ; Physical Sciences
资助者National Natural Science Foundation of China(11303046 ; National Natural Science Foundation of China(11303046 ; gravitational wave pilot B(XDB23040100) ; gravitational wave pilot B(XDB23040100) ; National Program on Key Research and Development Project(2016YFA0400804) ; National Program on Key Research and Development Project(2016YFA0400804) ; 11673026) ; 11673026) ; National Natural Science Foundation of China(11303046 ; National Natural Science Foundation of China(11303046 ; gravitational wave pilot B(XDB23040100) ; gravitational wave pilot B(XDB23040100) ; National Program on Key Research and Development Project(2016YFA0400804) ; National Program on Key Research and Development Project(2016YFA0400804) ; 11673026) ; 11673026)
DOI10.1093/mnras/stx121
关键词[WOS]ACCRETING BLACK-HOLES ; ADVECTION-DOMINATED ACCRETION ; BROAD-BAND SPECTRA ; BIG BLUE BUMP ; SEYFERT-GALAXIES ; XMM-NEWTON ; COMPTON REFLECTION ; LOW/HARD STATE ; CYGNUS X-1 ; GX 339-4
收录类别SCI
语种英语
资助者National Natural Science Foundation of China(11303046 ; National Natural Science Foundation of China(11303046 ; gravitational wave pilot B(XDB23040100) ; gravitational wave pilot B(XDB23040100) ; National Program on Key Research and Development Project(2016YFA0400804) ; National Program on Key Research and Development Project(2016YFA0400804) ; 11673026) ; 11673026) ; National Natural Science Foundation of China(11303046 ; National Natural Science Foundation of China(11303046 ; gravitational wave pilot B(XDB23040100) ; gravitational wave pilot B(XDB23040100) ; National Program on Key Research and Development Project(2016YFA0400804) ; National Program on Key Research and Development Project(2016YFA0400804) ; 11673026) ; 11673026)
WOS研究方向Astronomy & Astrophysics
WOS类目Astronomy & Astrophysics
WOS记录号WOS:000398418900061
引用统计
被引频次:5[WOS]   [WOS记录]     [WOS相关记录]
文献类型期刊论文
条目标识符http://ir.bao.ac.cn/handle/114a11/8220
专题空间科学研究部
作者单位1.Chinese Acad Sci, Natl Astron Observ, Key Lab Space Astron & Technol, Beijing 100012, Peoples R China
2.Univ Chinese Acad Sci, Sch Astron & Space Sci, 19A Yuquan Rd, Beijing 100049, Peoples R China
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Qiao, Erlin,Liu, B. F.. The condensation of the corona for the correlation between the hard X-ray photon index Gamma and the reflection scaling factor R in active galactic nuclei[J]. MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY,2017,467(1):898-905.
APA Qiao, Erlin,&Liu, B. F..(2017).The condensation of the corona for the correlation between the hard X-ray photon index Gamma and the reflection scaling factor R in active galactic nuclei.MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY,467(1),898-905.
MLA Qiao, Erlin,et al."The condensation of the corona for the correlation between the hard X-ray photon index Gamma and the reflection scaling factor R in active galactic nuclei".MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY 467.1(2017):898-905.
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