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Trainsient Accretion Disk and Energy Mechanism of Gamma Ray Bursts |
| LU Ye1,2;ZHENG Guang-Sheng(K. S. Cheng)3;ZHAO Gang1;YANG Lan-Tian2
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| 1Beijing Astronomical Observatory, Chinese Academy of Sciences, Beijing 100012
2Department of Physics, Huazhong Normal University, Wuhan 430079
3Department of Physics, University of Hong Kong, Pokfulam Road, Hong Kong
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| Cite this article: |
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LU Ye, ZHENG Guang-Sheng(K. S. Cheng), ZHAO Gang et al 2000 Chin. Phys. Lett. 17 73-75 |
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Abstract We suggest that a rotating massive black hole (l06 M O) located at an inactive galaxy may convert its host into a transient active phase by capturing and disrupting a star. During this period, a transient accretion disk is formed and a strong transient magnetic field can be produced in the inner boundary of the accretion disk. A large amount of rotational energy of the black hole is extracted and released in the ultra relativistic jet with a bulk Lorentz factor larger than l03 via Blandford-Znajek process. The relativistic jet energy can be converted into γ-ray radiation in the shock region located at a distance of about 1.4 x 1016 cm via the external shock mechanism. The observed properties of GRB971214 is used to illustrate our model.
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| Keywords:
98.62.Mw
98.70.Rz
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Published: 01 January 2000
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| PACS: |
98.62.Mw
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(Infall, accretion, and accretion disks)
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98.70.Rz
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(γ-ray sources; γ-ray bursts)
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