黑洞吸积盘径向参量的演化

利用黑洞吸积盘演化的基本方程组 ,在纯吸积情况下 ,求得了薄、厚吸积盘及一般厚吸积盘的黑洞视界半径rH的演化方程 .证实了中心黑洞与吸积盘相互影响的基本性质 ,并得到一些新的结果 .黑洞视界半径rH演化并非完全单调 ,其演化特性与吸积盘的类型有关 :对于薄盘 ,rH单调递增 ;对于临界厚盘 ,rH先增后减 ;对于一般厚盘 ,rH先增后减再递增 .还讨论了吸积盘内边缘与黑洞视界间隔的演化 .

Evolution of Radial Parameters in Black-Hole Accretion Disk

The basic evolution equations of black hole accretion disks are used to derive the evolution characters of horizon radius r H of black hole surrounded by thin the thick disks respectively. It is proved that the evolution characters are affected by the interaction between the central black hole and the accretion disk. Some new results are obtained. The non monotonous evolving characters of r H are related to accretion modes. In the case of thin disks r H increases monotonously, while r H increases first and then decreases in the case of thick disks, and r H for general thick disks increases first and then decreases and increases at last. The evolution characters of the gap between the inner radius and black hole horizon are discussed.