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Evaporation: The change from accretion via a thin disk to a coronal flow
Meyer, F1; Liu BF(刘碧芳)1,2; Meyer-Hofmeister, E1
发表期刊ASTRONOMY & ASTROPHYSICS
2000-09
卷号361期号:1页码:175-188
产权排序第2完成单位
收录类别SCI
关键词Black Hole Physics Accretion X-rays : Stars Accretion Disks Galaxies : Nuclei Stars : Individual : Cygnus X-1 Nova Muscae 1991
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.
语种英语
学科领域Astronomy & Astrophysics
文章类型Article
ISSN0004-6361
URL查看原文
WOS记录号WOS:000089510600024
WOS研究方向Astronomy & Astrophysics
WOS类目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
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被引频次:146[WOS]   [WOS记录]     [WOS相关记录]
文献类型期刊论文
条目标识符http://ir.ynao.ac.cn/handle/114a53/4933
专题高能天体物理研究组
通讯作者Meyer-Hofmeister, E
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
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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.
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