Gamma射线爆光曲线的一个简单激波模型(英文)  

A Simple Shock Model for the Light Curve of Gamma-ray Bursts

作　　者：苏成悦[1] 韩肇元[2] 

机构地区：[1]广东工业大学应用物理学院 [2]中国科技大学力学系安徽合肥,230026

出　　处：《天文研究与技术》2005年第1期1-11,共11页Astronomical Research & Technology

基　　金：SupportedbyNationalScienceFoundationofChina ( 1 0 2 730 1 9)andtheSpecialFundsforMajorState BasicResearchProject ( 973) .

摘　　要：采用一个简单的激波模型来讨论了珈玛射线爆光变曲线的轮廓。根据激波理论,爆炸产生压力脉冲并以压力波的形式传播,既有压缩波也有膨胀波。压缩波的合并产生激波,它的强度被随后并入的压缩波或膨胀波分别增强或减弱。该模型能自然地描述珈玛爆光变曲线和光变曲线具有的"快速上升指数下降"的轮廓特征。我们认为这一特征是压缩波和膨胀波的传播特性导致的。In this paper,a simple shock model is adopted to discuss the profile of Gamma-Ray Burst light curves.According to the shock theory,the ejecta produced by explosion form the pressure pulse,and it spreads in forms of either compression waves or expansion waves.Shocks are formed by merge of compression waves with each other and its magnitude is enhanced or declined by catching compression waves or expansion waves behind the shock respectively.This model can simulate the light curve of the gamma-ray burst and naturally describe the profile characteristic 'fast rise and decay exponent' very well.It is found that the transmission characteristic of the compression waves or expansion waves naturally result in the situation in Gamma-Ray Bursts.

关 键 词：珈玛爆 光变曲线 内激波模型 压力脉冲波 

分 类 号：P172.3[天文地球—天文学]