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Unusual Evolution Characteristics in Black Hole Disk-Accretion, |
WANG Ding-Xiong |
Department of Physics, Huazhong University of Science and Technology, Wuhan 430074 |
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Cite this article: |
WANG Ding-Xiong 2000 Chin. Phys. Lett. 17 463-465 |
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Abstract It is shown that evolution characteristics of black hole (BH) parameters in the pure disk-accretion are determined uniquely by BH spin parameter a*. Some unusual evolution characteristics of the parameters of BH accretion disks, such as angular velocity, temperature and event horizon radius, are investigated in both thin and thick disk-accretion. And the corresponding turning points, a*c. are derived. In addition, two characteristic functions describing the evolution of BH parameters are derived for thin and thick disks, respectively.
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Keywords:
97.60.Lf
98.62.Mw
04.70.-s
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Published: 01 June 2000
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