强磁场中相对论电子系集体的共振逆康普顿散射谱

发布时间：2017-12-28 09:38

本文关键词：强磁场中相对论电子系集体的共振逆康普顿散射谱　出处：《天文学报》2011年01期 　论文类型：期刊论文

【摘要】：强磁场中相对论电子的共振逆康普顿散射(RICS)是产生伽玛射线的有效机制.以前的工作曾论证,伽玛暴(GRB)的早期伽玛射线辐射可能主要由该机制产生.利用此辐射机制,伽玛暴研究中的一些困惑有可能得到较好的解释.例如,观测统计给出的"Amati关系"的起源,两段式(折断式)幂律谱的形成,特别是其中"死线问题"的解决方案,还有偏振的存在等.这里将重点讨论折断幂律谱形成问题.基于单个电子的RICS谱功率公式,导出了强磁场中大量相对论电子穿过周边低频辐射场时产生的集体RICS辐射谱(RICS谱光度)的简化解析公式,并将它应用于中子星周边几种典型的低频场(如黑体辐射场、幂律辐射场以及热轫致辐射场),以便与实际观测谱形比较.计算表明:在满足匹配条件(即近似共振条件)下,RICS辐射效率很高,其谱形普遍为两段式的幂律谱形式,与周边低频场性质无关.还论证RICS机制可能是伽玛暴、软伽玛重复暴和伽玛射线脉冲星在高能射线波段(硬X射线和伽玛射线)的一个理想的高效辐射机制.
[Abstract]:The strong magnetic field in the relativistic electron resonant inverse Compton scattering (RICS) is an effective mechanism to produce gamma rays. Previous work has demonstrated that gamma ray bursts (GRB) early gamma ray radiation may be mainly produced by this mechanism. The radiation mechanism of GRBs, some puzzles in the study may get a better explanation. For example, the origin of observation statistics are given "Amati", two segment (broken) form a power-law spectrum, especially the solution "deadline" problem, and the presence of the polarization. It will focus on a broken power-law spectrum. The formation of single electron RICS power spectrum based on formula is derived a large number of relativistic electrons in strong magnetic field through the collective RICS radiation surrounding low frequency radiation field spectra (RICS spectra photometric) the simplified analytical formula, which can be applied to neutron stars in the low-frequency field surrounding several typical (such as blackbody radiation field, power The law of radiation field and thermal bremsstrahlung field), so that with the observed spectrum. The calculation results indicated that under the matching condition (i.e. approximate resonance condition), RICS radiation efficiency is very high, its spectrum is generally two segment power-law spectrum form, has nothing to do with the surrounding nature. Also the low-frequency field RICS mechanism may be gamma ray bursts, Gama repeated bursts and gamma ray pulsars in high-energy X-ray band (hard X ray and gamma ray) an ideal efficient radiation mechanism.
【作者单位】：上海交通大学物理系粒子物理宇宙学研究所;南京大学天文系;西藏大学理学院物理系宇宙线研究所;
【基金】：国家自然科学基金(10703003和10778621) 高校博士点科研基金(20070248122) 国家重点基础研究发展计划(2009CB824800) 教育部科学技术研究重点项目(207114)资助
【分类号】：P172.3
【正文快照】： 1己卜食，，~J.‘二刀观测到的伽玛暴的早期伽玛射线辐射具有一些独特性质{‘一3}，用传统的内激波一同步辐射机制很难解释.例如，伽玛射线观测谱普遍呈两段式幂律谱形，对此目前没有简单可信的解释叫;特别是存在一个伽玛射线谱低能部分的谱指数问题，即所谓的“死线间题”.按

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