同步自吸收对Gamma射线暴余辉的影响(英文)  

The influence of synchrotron self-absorption on the GRB afterglow

作　　者：黄文涛[1] 刘学文[1] 许云[1] 杨丕博[1] 郑小平[1] 

机构地区：[1]华中师范大学物理科学与技术学院,武汉430079

出　　处：《华中师范大学学报（自然科学版）》2005年第3期315-319,共5页Journal of Central China Normal University：Natural Sciences

基　　金：This work was supported by the National Natural Science Foundation of China(10373007).

摘　　要：考虑同步自吸收效应后,讨论了G amm a射线暴余辉的谱并展示了G amm a射线暴GRB 970508余辉在光学波段的光变曲线.尽管光学余辉很复杂,所得到的结果仍然与观测结果符合的很好.因此不管是在火球+激波模型还是在喷流模型中,都应该全面地研究同步自吸收效应和内部能源机制,以使理论计算更好的拟合观测到的光变曲线.Taking into account the effect of synchrotron self-absorption, the radiation spectra and flux of gamma-ray burst afterglow are discussed. And this paper presents GRB970508 afterglow light curve in optical R band. Although the optical afterglows seem much more complicated, its results can still present a rather satisfactory agreement with observation. In the end it suggest that synchrotron selfabsorption and inner engine mechanism should be comprehensively studied either in fireball＋shock model or in jet model in order to make theoretical calculation fit the observed light curve completely well.

关 键 词：Gamma射线 爆发 火球 同步自吸收 

分 类 号：P142.82[天文地球—天体物理]