The Existence of Inner Cool Disks in the Low Hard State of Accreting Black Holes
We present our recent study on the condensation of matter from a corona to a cool, optically thick inner disk for black hole X-ray transient systems in the low hard state. A simple model for the exchange of energy and mass between the corona and disk promoted by thermal conduction is introduced. It is found that a weak, condensation-fed inner disk can be present in the low hard state of black hole transients for a range of luminosities which depend on the magnitude of the corona viscosity. For α~0.1-0.4, an inner disk can exist for luminosities in the range of 0.001-0.02 Eddington luminosity. The model is applied to the black hole candidate sources 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. 2006a). It is found that Compton cooling processes are important in the condensation, leading to the maintenance of cool inner disks in GX 339-4 in its low hard state.
Accretion accretion disks-black hole physics X-rays stars -X-rays binaries-stars individual (GX 339-4)
Liu, B. E Ronald E. Taam Meyer, F. Meyer-Hofmeister, E.
National Astronomical Observatories/Yunnan Observatory, Chinese Academy of Sciences, P. O. Box 110, Northwestern University, Department of Physics and Astronomy, 2131 Tech Drive, Evanston, IL 60208 AS Max-Planck-Institut fur Astrophysik, Karl Schwarzschildstr. 1, D-85740, Garching, Germany
国际会议
紧凑型物体的天体物理学国际会议(International Conference on Astrophysics of Compact Objects)
安徽黄山
英文
318-321
2007-07-01（万方平台首次上网日期，不代表论文的发表时间）