| Original Articles |
|
|
|
|
Investigation on the Quasi-Cycle of Black Hole Spin |
| WANG Ding-Xiong;XIAO Kan;LEI Wei-Hua |
| Department of Physics, Huazhong University of Science and
Technology, Wuhan 430074
|
|
| Cite this article: |
|
WANG Ding-Xiong, XIAO Kan, LEI Wei-Hua 2001 Chin. Phys. Lett. 18 466-468 |
|
|
|
|
Abstract A reverse condition of accretion flow and its constraints on black hole spin in the quasi-cycle are proposed. It is shown that the necessary condition for the quasi-cycle is that the closed magnetic field lines must dominate over the open ones at the horizon. The efficiency of converting accreted rest mass into radiation energy in the quasi-cycle is proved to increase as the strength of the magnetic transfer process. In addition, a general expression for the efficiency is derived.
|
| Keywords:
97.60.Lf
98.62.Mw
98.62.Js
|
|
|
Published: 01 March 2001
|
|
| PACS: |
97.60.Lf
|
(Black holes)
|
| |
98.62.Mw
|
(Infall, accretion, and accretion disks)
|
| |
98.62.Js
|
(Galactic nuclei (including black holes), circumnuclear matter, and bulges)
|
|
|
|
|
|
|
Viewed |
|
|
|
Full text
|
|
|
|
|
Abstract
|
|
|
|
|
