On the efficiency of internal shocks in gamma-ray bursts

被引：114

作者：

Beloborodov, AM ^{[1
]}

机构：

[1] Stockholm Observ, SE-13336 Saltsjobaden, Sweden

[2] Lebedev Phys Inst, Space Ctr, Moscow 117810, Russia

来源：

ASTROPHYSICAL JOURNAL | 2000年 / 539卷 / 01期

基金：

俄罗斯基础研究基金会;

关键词：

gamma rays : bursts;

D O I：

10.1086/312830

中图分类号：

P1 [天文学];

学科分类号：

0704 ;

摘要：

The fraction of a fireball kinetic energy that is radiated by internal shocks is sensitive to the amplitude of initial fluctuations in the fireball. We give a simple analytical description for the dissipation of modest-amplitude fluctuations and confirm it with direct numerical simulations. At high amplitudes, the dissipation occurs in a nonlinear regime with efficiency approaching 100%. Most of the fireball energy can then be radiated away by the prompt gamma-ray burst, and only a fraction remains for the afterglow.

引用

页码：L25 / L28

页数：4

共 9 条

[1] Gamma-ray bursts from internal shocks in a relativistic wind: temporal and spectral properties [J].