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Magnetic Coupling of a Rotating Black Hole with the Surrounding Accretion Disc |
| WANG Ding-Xiong;XIAO Kan;LEI Wei-Hua |
| Department of Physics, Huazhong University of Science and
Technology, Wuhan 430074
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| Cite this article: |
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WANG Ding-Xiong, XIAO Kan, LEI Wei-Hua 2001 Chin. Phys. Lett. 18 1150-1152 |
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Abstract The evolution characteristics and energy extraction of a rotating black hole are investigated by considering magnetic coupling with the surrounding accretion disc. It is found that both mass and spin of the black hole might be reduced by the joint effects of disc accretion and magnetic coupling, provided that the latter is stronger than the former. The efficiencies of the two energy mechanisms are calculated and compared to a variety of parameters. In addition, the validity of the laws of black hole thermodynamics is discussed.
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| Keywords:
97.60.Lf
98.62.Mw
98.62.Js
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Published: 01 August 2001
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| PACS: |
97.60.Lf
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(Black holes)
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98.62.Mw
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(Infall, accretion, and accretion disks)
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98.62.Js
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(Galactic nuclei (including black holes), circumnuclear matter, and bulges)
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