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Evaporation: The change from accretion via a thin disk to a coronal flow
文献类型：期刊论文
| 作者 | Meyer, F1; Liu BF(刘碧芳)1,2 ; Meyer-Hofmeister, E1
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| 刊名 | ASTRONOMY & ASTROPHYSICS
 |
| 出版日期 | 2000-09 |
| 卷号 | 361期号:1页码:175-188 |
| 关键词 | accretion, accretion disks black hole physics X-rays : stars stars : individual : Cygnus X-1, Nova Muscae 1991 galaxies : nuclei |
| ISSN号 | 0004-6361 |
| 产权排序 | 第二完成单位 |
| 通讯作者 | Meyer-Hofmeister, E |
| 英文摘要 | We present a model for a corona above a geometrically thin standard disk around a black hole. This corona is fed by matter from the thin disk which evaporates from the cool layers underneath. An equilibrium establishes between the cool accretion stream and the hot flow. In the inner region evaporation becomes so efficient that at low accretion rates all matter flows via the corona and proceeds towards the black hole as an advection-dominated accretion flow (ADAF). We investigate this transition for accretion disks around stellar black holes. We derive a set of four ordinary differential equations which describe the relevant processes and solve them numerically. The evaporation efficiency has a maximum value where the advection-dominated structure of the corona (at large distances from the black hole) changes to a radiation-dominated structure (at small distances). This maximum can be related to the observed spectral transitions in black hole X-ray binaries. Our solutions of coronal structure are valid for both, accretion in galactic X-ray transients and in AGN. |
| WOS标题词 | Science & Technology ; Physical Sciences |
| 学科主题 | Astronomy & Astrophysics |
| 类目[WOS] | Astronomy & Astrophysics |
| 研究领域[WOS] | Astronomy & Astrophysics |
| 关键词[WOS] | ADVECTION-DOMINATED ACCRETION ; X-RAY NOVAE ; BLACK-HOLES ; CYGNUS X-1 ; SPECTRAL EVOLUTION ; GLOBAL STRUCTURE ; DWARF NOVAE ; QUIESCENCE ; TRANSITIONS ; ATMOSPHERES |
| 收录类别 | SCI |
| 原文出处 | http://adsabs.harvard.edu/abs/2000A%26A...361..175M |
| 语种 | 英语 |
| WOS记录号 | WOS:000089510600024 |
| 源URL | [http://ir.ynao.ac.cn/handle/114a53/4933]  |
| 专题 | 云南天文台_高能天体物理研究组 |
| 作者单位 | 1.Max-Planck-Institut f¨ur Astrophysik, Karl-Schwarzschild-Strasse 1, 85740 Garching, Germany 2.Chinese Academy of Sciences, Yunnan Observatory, P.O.Box 110, Kunming 650011, P.R. China |
| 推荐引用方式 GB/T 7714 | Meyer, F,Liu BF,Meyer-Hofmeister, E. Evaporation: The change from accretion via a thin disk to a coronal flow[J]. ASTRONOMY & ASTROPHYSICS,2000,361(1):175-188. |
| APA | Meyer, F,Liu BF,&Meyer-Hofmeister, E.(2000).Evaporation: The change from accretion via a thin disk to a coronal flow.ASTRONOMY & ASTROPHYSICS,361(1),175-188. |
| MLA | Meyer, F,et al."Evaporation: The change from accretion via a thin disk to a coronal flow".ASTRONOMY & ASTROPHYSICS 361.1(2000):175-188. |
入库方式： OAI收割
来源：云南天文台
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