Formation of Inner Cool Disks in Black Hole Low State

摘要：

We present our recent study on the formation of a cool disk in the in nermost region of accreting black holes in the low hard state. By taking into account the exchange of energy and mass between the corona and disk promoted by thermal conduction, it is found that a weak disk can be maintained by condensation of matter from a corona to the disk for luminosities in the range of 0.001-0.03 Eddington lumi nosity. Properties of the inner disk, for instance, the disk temperature as a function of X-ray luminosity, are present. The model is applied to the X-ray observations of the black hole candidate source GX 339-4 in the low hard state for which evidence is provided pointing to the possible existence of a cool inner disk (Miller et al. 2006b; Tomsick et al. 2008). Application to supermassive black holes are also discussed. It is suggested that such inner cool disks may contribute to the optical and ultraviolet emission of low lumin08ity active galactic nuclei.

关键词： accretion accretion disks - black hole physics - X-rays stars -X-rays binaries - stars individual (GX 339-4)

作者: B.F. Liu Ronald E.Taam F.Meyer E.Meyer-Hofmeister

作者单位: National Astronomical Observatories/Yunnan Observatory,Chinese Academy of Sciences,P.O. Box 110,Kunm Northwestern University,Department of Physics and Astronomy,2131 Tech Drive, Evanston,IL 60208,ASIAA Max-Planck-Institut für Astrophysik, Karl Schwarzschildstr.1,D-85740,Garching,Germany Max-Planck-Institut für Astrophysik, Karl Schwarzschildstr.1,D-85740,Garching, Germany

会议类型: 国际会议

会议名称: The 10th Asian-Pacific Regional International Astronomical Union Meeting(第十届亚洲及太平洋地区天文学大会 APRIM)

会议地点: 昆明

会议语种:英文

页码: 236-238

在线出版日期: 2008-08-03（万方平台首次上网日期，不代表论文的发表时间）