Correlation between the photon index and X-ray luminosity of black hole X-ray binaries and active galactic nuclei: observations and interpretation
文献类型：期刊论文
| 作者 | Yang, Qi-Xiang1,2; Xie, Fu-Guo1; Yuan, Feng1 ; Zdziarski, Andrzej A.3; Gierlinski, Marek4; Ho, Luis C.5,6,7; Yu, Zhaolong1
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| 刊名 | MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY
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| 出版日期 | 2015-02-21 |
| 卷号 | 447期号:2页码:1692-1704 |
| 关键词 | accretion galaxies: active quasars: general X-rays: general X-rays: binaries accretion discs |
| 英文摘要 | We investigate the observed correlation between the 2-10 keV X-ray luminosity (in unit of the Eddington luminosity; l(X) L-X/L-Edd) and the photon index (Gamma) of the X-ray spectrum for both black hole X-ray binaries (BHBs) and active galactic nuclei (AGNs). We construct a large sample, with 10(-9) less than or similar to l(X) less than or similar to 10(-1). We find that Gamma is positively and negatively correlated with l(X) when l(X) greater than or similar to 10(-3) and 10(-65) less than or similar to l(X) less than or similar to 10(-3), respectively, while Gamma is nearly a constant when l(X) less than or similar to 10(-6.5). We explain the above correlation in the framework of a coupled hot accretion flow-jet model. The radio emission always comes from the jet while the X-ray emission comes from the accretion flow and jet when l(X) is above and below 10(-6.5), respectively. More specifically, we assume that with the increase of mass accretion rate, the hot accretion flow develops into a clumpy and further a disc-corona two-phase structure because of thermal instability. We argue that such kind of two-phase accretion flow can explain the observed positive correlation. |
| WOS标题词 | Science & Technology ; Physical Sciences |
| 类目[WOS] | Astronomy & Astrophysics |
| 研究领域[WOS] | Astronomy & Astrophysics |
| 关键词[WOS] | HOT ACCRETION FLOWS ; ADVECTION-DOMINATED ACCRETION ; NEWTON QUASAR SURVEY ; BROAD-BAND SPECTRA ; INNER COOL DISKS ; EDDINGTON RATIO ; STATE TRANSITIONS ; SEYFERT-GALAXIES ; FUNDAMENTAL PLANE ; OUTBURST DECAY |
| 收录类别 | SCI |
| 语种 | 英语 |
| WOS记录号 | WOS:000350272900056 |
| 公开日期 | 2015-08-18 |
| 源URL | [http://119.78.226.72/handle/331011/18215]  |
| 专题 | 上海天文台_星系宇宙学重点实验室 |
| 作者单位 | 1.Chinese Acad Sci, Shanghai Astron Observ, Key Lab Res Galaxies & Cosmol, Shanghai 200030, Peoples R China 2.Univ Chinese Acad Sci, Beijing 100049, Peoples R China 3.Ctr Astron M Kopernika, PL-00716 Warsaw, Poland 4.Univ Durham, Dept Phys, Durham DH1 3LE, England 5.Peking Univ, Kavli Inst Astron & Astrophys, Beijing 100871, Peoples R China 6.Peking Univ, Dept Astron, Beijing 100871, Peoples R China 7.Observ Carnegie Inst Sci, Pasadena, CA 91101 USA |
| 推荐引用方式 GB/T 7714 | Yang, Qi-Xiang,Xie, Fu-Guo,Yuan, Feng,et al. Correlation between the photon index and X-ray luminosity of black hole X-ray binaries and active galactic nuclei: observations and interpretation[J]. MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY,2015,447(2):1692-1704. |
| APA | Yang, Qi-Xiang.,Xie, Fu-Guo.,Yuan, Feng.,Zdziarski, Andrzej A..,Gierlinski, Marek.,...&Yu, Zhaolong.(2015).Correlation between the photon index and X-ray luminosity of black hole X-ray binaries and active galactic nuclei: observations and interpretation.MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY,447(2),1692-1704. |
| MLA | Yang, Qi-Xiang,et al."Correlation between the photon index and X-ray luminosity of black hole X-ray binaries and active galactic nuclei: observations and interpretation".MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY 447.2(2015):1692-1704. |
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来源：上海天文台
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