γ射线暴火球的演化与余辉  

GAMMA-RAY BURSTS : EVOLUTION OF THE FIREBALL AND AFTERGLOW

作　　者：黄文耿[1,2] 杨丕博[1] 陆烨[1] 

机构地区：[1]华中师范大学物理系天体物理研究所 [2]中国科学院空间科学与应用研究中心北京100080

出　　处：《天文学报》2001年第1期16-21,共6页Acta Astronomica Sinica

基　　金：国家自然科学基金资助项目!( 1 97730 0 5)

摘　　要：GRB主暴后 ,火球继续膨胀 ,根据暴后火球的动力学演化方程 ,考虑电子的分布随时间的变化 ,通过数值求解 ,得到光学R波段和X射线余辉与时间t的关系 .计算结果与观测结果相比较 ,符合得很好 .最后 ,还讨论了火球 +激波模型的不足 .After the main part of a GRB, its fireball continuously expands. With the hydrodynamic equations for the postburst fireball, the authors study the distribution of electrons, which changes with time. The equations are solved numerically and the relations of the flux density of Optical afterglow in R band as well as the X-ray afterglow with time have been obtained. The results fit the observations quite well. Finally the shortcomings of the fireball+blast model are discussed.

关 键 词：Γ射线暴 火球 余辉 能源机制 GRB 动力学演化方程 

分 类 号：P172.3[天文地球—天文学]