Origin of X-ray emission from transient black hole candidates in quiescence
文献类型：期刊论文
| 作者 | Pszota, Gabor1; Zhang, Hui2 ; Yuan, Feng2,3; Cui, Wei1
|
| 刊名 | MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY
 |
| 出版日期 | 2008-09-01 |
| 卷号 | 389期号:1页码:423-428 |
| 关键词 | radiation mechanisms: non-thermal radiation mechanisms: thermal stars: individual: XTE J1550-564 stars: individual: GRO J1655-40 stars: individual: V404 Cyg -X-rays: binaries |
| 英文摘要 | We report results from a systematic study of X-ray emission from black hole transients in quiescence. In this state, mass accretion is thought to follow the geometry of an outer optically thick, geometrically thin disc and an inner optically thin, geometrically thick radiatively inefficient accretion flow (RIAF). The inner flow is likely also coupled to the jets near the black hole that are often seen in such systems. The goal of the study is to see whether the X-ray emission in the quiescent state is mainly powered by the accretion flow or by the jets. Using data from deep XMM-Newton observations of selected black hole transients, we have found that the quiescent X-ray spectra are, to a high precision, of power-law shape in the cases of GRO J1655-40 and V404 Cyg. Such spectra deviate significantly from the expected X-ray spectrum of the RIAF at very low-accretion rates. On the other hand, they can naturally be explained by emission from the jets, if the emitting electrons follow a power-law spectral distribution (as is often assumed). The situation remains ambiguous in the case of XTE J1550-564, due to the relatively poorer quality of the data. We discuss the implication of the results. |
| WOS标题词 | Science & Technology ; Physical Sciences |
| 类目[WOS] | Astronomy & Astrophysics |
| 研究领域[WOS] | Astronomy & Astrophysics |
| 关键词[WOS] | ADVECTION-DOMINATED ACCRETION ; GRO J1655-40 ; XMM-NEWTON ; BINARIES ; JET ; STATES ; MODEL ; DISC ; XTE-J1550-564 ; XTE-J1118+480 |
| 收录类别 | SCI |
| 语种 | 英语 |
| WOS记录号 | WOS:000270677800043 |
| 源URL | [http://119.78.226.72/handle/331011/19532]  |
| 专题 | 上海天文台_星系宇宙学重点实验室 |
| 作者单位 | 1.Purdue Univ, Dept Phys, W Lafayette, IN 47907 USA 2.Chinese Acad Sci, Shanghai Astron Observ, Shanghai 200030, Peoples R China 3.Univ Sci & Technol China, Joint Inst Galaxy & Cosmol, Shanghai Astron Observ, Hefei, Peoples R China |
| 推荐引用方式 GB/T 7714 | Pszota, Gabor,Zhang, Hui,Yuan, Feng,et al. Origin of X-ray emission from transient black hole candidates in quiescence[J]. MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY,2008,389(1):423-428. |
| APA | Pszota, Gabor,Zhang, Hui,Yuan, Feng,&Cui, Wei.(2008).Origin of X-ray emission from transient black hole candidates in quiescence.MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY,389(1),423-428. |
| MLA | Pszota, Gabor,et al."Origin of X-ray emission from transient black hole candidates in quiescence".MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY 389.1(2008):423-428. |
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来源：上海天文台
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