| Original Articles |
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Coexistence of Two Mechanisms for Extracting Energy from a
Rotating Black Hole |
| MA Ren-Yi;WANG Ding-Xiong; LEI Wei-Hua |
| Department of Physics, Huazhong University of Science and Technology, Wuhan 43007 |
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| Cite this article: |
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MA Ren-Yi, WANG Ding-Xiong, LEI Wei-Hua 2003 Chin. Phys. Lett. 20 1644-1647 |
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Abstract Evolution characteristics of a rotating black hole (BH) are discussed in coexistence of the Blandford-Znajek (BZ) process and the magnetic coupling (MC) process in the parameter space consisting of the BH spin and the power law index of the magnetic field on the disc. The condition for the coexistence of the two energy mechanisms are derived by using the mapping relation between the angular coordinate on the BH horizon and the radial coordinate on the disc. It is shown that not only the two mechanisms can coexist, but also the power and the rate of change of BH entropy in the BZ process will dominate over those in the MC process, provided that the BH spin and the power-law index are great enough.
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| Keywords:
97.60.Lf
98.62.Mw
98.62.Js
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Published: 01 September 2003
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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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