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
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
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
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
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.
LU Ye;ZHENG Guang-Sheng(K. S. Cheng);ZHAO Gang;YANG Lan-Tian
. Trainsient Accretion Disk and Energy Mechanism of Gamma Ray Bursts[J]. 中国物理快报, 2000, 17(1): 73-75.
LU Ye, ZHENG Guang-Sheng(K. S. Cheng), ZHAO Gang, YANG Lan-Tian
. Trainsient Accretion Disk and Energy Mechanism of Gamma Ray Bursts. Chin. Phys. Lett., 2000, 17(1): 73-75.
2000, Vol. 17 
