Huang 2007 伽玛暴的非相对论阶段

主要内容:
总结了以前的非相对论阶段的动力学，并加上了最近的观测进展。

精彩摘抄:


文章信息:

arXiv:0707.4125 [ps, pdf, other]

Title: Nonrelativistic phase in gamma-ray burst afterglows

Authors: Y.F. Huang, T. Lu, K.S. Cheng

Comments: A review paper accepted for publication in a Chinese journal of: Progress in Natural Science. 6 figures, 21 pages

Subjects: Astrophysics (astro-ph)

The discovery of multiband afterglows definitely shows that most $\gamma$-ray bursts are of cosmological origin. $\gamma$-ray bursts are found to be one of the most violent explosive phenomena in the Universe, in which astonishing ultra-relativistic motions are involved. In this article, the multiband observational characteristics of $\gamma$-ray bursts and their afterglows are briefly reviewed. The standard model of $\gamma$-ray bursts, i.e. the fireball model, is described. Emphasis is then put on the importance of the nonrelativistic phase of afterglows. The concept of deep Newtonian phase is elaborated. A generic dynamical model that is applicable in both the relativistic and nonrelativistic phases is introduced. Based on these elaborations, the overall afterglow behaviors, from the very early stages to the very late stages, can be conveniently calculated.