Psaltis D
Astrophys J. 1999 Dec 1;526(2):L101-L104. doi: 10.1086/312369.
We calculate upper bounds on the inner radii of geometrically thin accretion disks in galactic black hole systems by relating their rapid variability properties to those of neutron stars. We infer that the inner disk radii do not exhibit large excursions between different spectral states, in contrast with the concept that the disk retreats significantly during the soft-to-hard-state transition. We find that, in the hard state, the accretion disks extend down to radii less, similar6-25 GM/c2 and discuss the implications of our results for models of black hole X-ray spectra.
我们通过将银河系黑洞系统中几何薄吸积盘的快速变化特性与中子星的特性相关联，来计算其内部半径的上限。我们推断，与吸积盘在软态到硬态转变期间显著后退的概念相反，内部盘半径在不同光谱状态之间不会有大幅变化。我们发现，在硬态下，吸积盘延伸至半径小于约6 - 25GM/c² ，并讨论了我们的结果对黑洞X射线光谱模型的影响。
