| Original Articles |
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Cycle of Black Hole Spin due to Disc Accretion Alternating with Magnetic Transfer |
| WANG Ding-Xiong;MA Ren-Yi;LEI Wei-Hua;YE Yong-Chun;GONG Xiao-Long |
| 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, MA Ren-Yi, LEI Wei-Hua et al 2003 Chin. Phys. Lett. 20 1895-1898 |
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Abstract The cycle of black hole (BH) spin proposed by Li and Paczynski (henceforth CYCLP) is compared with a more natural model (henceforth CYC03), in which energy and angular momentum are transferred from a rotating BH to a region of some widths by the closed magnetic field lines. It turns out that the efficiency of converting the accreted mass into the radiation energy in the CYC03 is less than that estimated in the CYCLP, while the BH mass and entropy in the CYC03 are greater than those in the CYCLP. It is shown that the features of the CYC03 are insensitive to the power law index indicating the variation of the magnetic field in the disc.
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| Keywords:
97.60.Lf
98.62.Mw
98.62.Js
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Published: 01 October 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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