Lei 2007 进动模型解释伽玛暴的光变曲线

主要内容:
在BZ－MC的中心能源机制的基础上，考虑喷流的进动来拟合伽玛暴的光变。

精彩摘抄:


文章信息:
A model of the light curves of Gamma-Ray Bursts

Authors: W. H. Lei, D. X. Wang, B. P. Gong, C. Y. Huang

(Submitted on 10 Mar 2007 (v1), last revised 27 Mar 2007 (this version, v2))

Abstract: An extreme Kerr black hole (BH) surrounded by a precessing disk is invoked to explain the light curves of gamma-ray bursts (GRBs) based on the coexistence of the Blandford-Znajek (BZ) and the magnetic coupling (MC) processes. The overall shape of the light curves and the duration of GRBs are interpreted by the evolution of the half-opening angle of the magnetic flux on the BH horizon, and the complex temporal structures are modulated by the precession and nutation of the jet powered by the BZ process. The time profile of the emission exhibits a fast rise and a slow decay due to the effect of the evolution of the half-opening angle. The light curves of several GRBs are well fitted by this model with only six free parameters.

Comments:

8 pages, 8 figures. Accepted for publication in A&A

Subjects:

Astrophysics (astro-ph)

Cite as:

arXiv:astro-ph/0703238v2