Evaporation: The change from accretion via a thin disk to a coronal flow

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	Evaporation: The change from accretion via a thin disk to a coronal flow
	Meyer, F 1; Liu BF(刘碧芳)1,2 ; Meyer-Hofmeister, E 1
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
ISSN	0004-6361
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
引用统计	被引频次：152[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
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.

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