Trainsient Accretion Disk and Energy Mechanism of Gamma Ray Bursts

• 来源期刊: 中国物理快报（英文版）
• 年，卷（期）: 2000,（1）
• 页码范围: 73-75
• 页数: 3页
• 语种: 英文

摘要

We suggest that a rotating massive black hole (106M ) 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 103 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 × 1016 cm via the external shock mechanism.The observed properties of GRB971214 is used to illustrate our model