尘埃消光对伽玛射线暴余辉的影响
发布时间：2018-12-15 15:55
【摘要】：为了研究尘埃消光对伽玛射线暴余辉的影响,基于严格的Mie理论和最新的星际尘埃光学性质,进行了高精度的数值计算,并分析具有不同物理参数的尘埃所产生的消光曲线.结果表明,介质密度和金属丰度是决定消光总量的主要物理参数,而尘埃颗粒大小的分布则是产生不同消光曲线轮廓的重要物理参数.如果尘埃颗粒相互聚集形成导致尺度增大,将产生较平或者较灰的消光曲线,同时绝对总量将减少;相反,如果尘埃颗粒由于某种原因发生离解导致尺度变小,将产生较陡的消光曲线,同时消光总量将增加.这些结果将对理解光学暗暴的形成机制提供重要的启示.
[Abstract]:In order to study the effect of dust extinction on the afterglow of gamma-ray bursts, a high-precision numerical calculation is carried out based on the strict Mie theory and the latest interstellar dust optical properties, and the extinction curves of dust with different physical parameters are analyzed. The results show that the density of medium and the abundance of metals are the main physical parameters to determine the total extinction amount, and the distribution of dust particle size is an important physical parameter to produce different extinction curve contours. If the dust particles gather with each other and cause the scale to increase, there will be a flat or gray extinction curve, and the absolute total amount will be reduced. On the contrary, if the dust particles become smaller due to the dissociation of dust particles for some reason, a steep extinction curve will be produced, and the total extinction amount will increase. These results will provide important implications for understanding the formation mechanism of optical dark storms.
【作者单位】： 中国科学院紫金山天文台;河北师范大学物理系;
【基金】：国家自然科学基金(10621303,10973041,11073057) 国家重点基础研究发展规划项目(2007CB815404)资助
【分类号】：P172.3
[Abstract]:In order to study the effect of dust extinction on the afterglow of gamma-ray bursts, a high-precision numerical calculation is carried out based on the strict Mie theory and the latest interstellar dust optical properties, and the extinction curves of dust with different physical parameters are analyzed. The results show that the density of medium and the abundance of metals are the main physical parameters to determine the total extinction amount, and the distribution of dust particle size is an important physical parameter to produce different extinction curve contours. If the dust particles gather with each other and cause the scale to increase, there will be a flat or gray extinction curve, and the absolute total amount will be reduced. On the contrary, if the dust particles become smaller due to the dissociation of dust particles for some reason, a steep extinction curve will be produced, and the total extinction amount will increase. These results will provide important implications for understanding the formation mechanism of optical dark storms.
【作者单位】： 中国科学院紫金山天文台;河北师范大学物理系;
【基金】：国家自然科学基金(10621303,10973041,11073057) 国家重点基础研究发展规划项目(2007CB815404)资助
【分类号】：P172.3
【相似文献】
相关期刊论文 前10条
1 黄永锋;;2008南京伽玛射线暴会议[J];国际学术动态;2009年04期
2 李宗伟;1998年——超新星研究的峰年[J];天文爱好者;1999年01期
3 李明涓;;强磁星在闪耀[J];天文爱好者;2006年02期
4 陆W，
本文编号：2380917
本文链接：https://www.wllwen.com/kejilunwen/tianwen/2380917.html
