伽玛暴光学余辉中的双喷流成份行为

发布时间：2018-05-13 12:57

本文选题：伽玛暴 + 双喷流　；参考：《广西大学学报(自然科学版)》2015年03期

【摘要】：伽玛暴余辉的双拐折行为可以用双喷流成份结构模型得到较好的解释,但至今其物理参数还未解。为给出其相应的物理参数,文中将对具有双喷流成份的伽玛暴光学余辉进行统计分析,用外激波模型时域指数α和频域指数β的关系(closure relation)对数据进行限制,得到GRB 071003,GRB 080319B,GRB 090426和GRB 100219A共4个具有外激波模型的伽玛暴双成份喷流特征。这些伽玛暴第一个喷流成份的张角都在1°以内,而第二个喷流成份的张角增大到2°~7°,与单成份喷流的张角一致。其各向同性辐射能量在1051~1054erg,电子谱指数p约为2,比典型值2.3硬。长暴能较好符合Amati关系。
[Abstract]:The double turning behavior of the afterglow of gamma storm can be well explained by the double jet component structure model, but its physical parameters have not been solved yet. In order to give the corresponding physical parameters, the statistical analysis of gamma exposure afterglow with double jet composition is carried out, and the data are restricted by the relationship between the time-domain exponent 伪 and the frequency-domain exponent 尾 of the external shock model. GRB 071003 GRB080319BGRB 090426 and GRB 100219A have been obtained with four gamma storm two-component jet characteristics with external shock model. The opening angle of the first jet component of these gamma-ray bursts is less than 1 掳, while that of the second jet component increases to 2 掳/ 7 掳, which is consistent with that of the single-component jet. The isotropic radiation energy is 1051 ~ 1054 erg and the electron spectrum exponent p is about 2, which is harder than the typical value of 2.3. The long burst can fit the Amati relation well.
【作者单位】：广西大学物理科学与工程技术学院国家天文台广西大学天体物理和空间科学研究中心;广西中医药大学数理教研室;广西相对论天体物理重点实验室;
【基金】：国家自然科学基金资助项目(11303005,U1331202) 广西自然科学基金资助项目(2013GXNSFFA019001) 广西高等学校科研项目(201204LX206) 新世纪广西高等教育教学改革工程项目(2012JGB107,2013JGZ100)
【分类号】：P172.3

【参考文献】