共动系中伽玛暴峰值能量的分布及其与光度的关系

发布时间：2018-01-03 04:09

本文关键词：共动系中伽玛暴峰值能量的分布及其与光度的关系　出处：《天文学报》2017年03期 　论文类型：期刊论文

【摘要】：伽玛暴νfν谱的峰值能量E_p是伽玛暴的一个很重要的观测物理量,观测系中伽玛暴νf_ν谱的峰值能量Ep分布很宽.根据各向同性光度L_(iso)、初始洛伦兹因子Γ_0和暴源系中峰值能量E_p,z之间的关系式估算伽玛暴的初始洛伦兹因子Γ_0,再把伽玛暴νf_ν谱的峰值能量E_p和光度L_(iso)修正到共动坐标系,发现共动系中峰值能量的分布还是很宽.这意味着观测系中E_p的宽分布可能是伽玛暴的真实物理分布.检验了共动坐标系中光度和峰值能量之间的关系,发现它们之间仍然存在相关性.最后,进一步对伽玛暴的辐射物理进行限制,认为共动坐标系中峰值能量分布很宽可能是由于辐射电子的洛伦兹因子γ_e分布很宽.
[Abstract]:GRB V F V peak energy E_p is the GRB is a very important observation physical quantity, observation system of gamma peak energy bursts Ep V f_ spectrum V wide distribution. According to the isotropic luminosity of L_ (ISO), the peak energy of initial E_p _0 and Lorenz factor gamma burst source in turn the Department of Z between the estimated initial GRB Lorenz factor gamma _0, then the GRB V f_ V peak energy E_p L_ (ISO) and photometric correction to the comoving coordinate system, found that the distribution of total peak energy is still very wide. This means that the distribution system of E_p wide may be observed is a real physical distribution of gamma ray bursts. To test the relationship between total luminosity and the peak energy of the coordinate system, still found that there exists correlation between them. Finally, further restrictions on the radiation physics of gamma ray bursts, that CO moving coordinate system the peak energy distribution is very wide may be due to the electron radiation The distribution of Lorenz factor gamma _e is very wide.

【作者单位】：厦门理工学院光电与通信工程学院;福建省光电技术与器件重点实验室;
【基金】：国家自然科学基金项目(61504113)资助
【分类号】：P172.3
【正文快照】： 1引言伽玛射线暴(Gamma-Ray Bursts,简称伽玛暴、GRBs)是一种恒星级、来自于宇宙学距离的伽玛波段流量急剧增加又急剧衰减的现象.自伽玛暴被发现以来,一直吸引着天文学、宇宙学、物理学等领域的科学家们的兴趣.伽玛暴能谱的研究对理解伽玛暴的本质非常重要.对伽玛暴谱成分的解

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