伽玛射线超新星遗迹研究新进展

发布时间：2018-06-28 23:46

本文选题：宇宙线 + 超新星遗迹　；参考：《中国科学:物理学力学天文学》2015年11期

【摘要】：对宇宙线起源问题的探讨,正随着新一代地基和空间伽玛射线望远镜观测的开展而深化.作为普遍认为的能量在"膝"部以下宇宙线粒子主要加速场所的超新星遗迹,在Ge V Te V能段探测到的样本在不断扩大,一些具有指示性意义的在流量、能谱方面的统计特征也得到显现.为证实作为宇宙线主体的相对论性质子能够由超新星遗迹的激波加速产生,对超新星遗迹的伽玛射线辐射的观测和理论研究,特别对于与分子云作用的超新星遗迹的强子作用伽玛射线辐射的研究,已取得较大的进展,其中W44,IC 443等遗迹在70 Me V附近?0介子衰变的特征性鼓包特别引人瞩目.对强子作用的辐射机制目前已可分为质子就地直接打击和逃逸扩散"照亮"分子云两大类.但对大样本超新星遗迹的伽玛射线辐射更系统的研究,包括对超新星遗迹的伽玛射线及多波段辐射谱进行合理模型计算、澄清这些遗迹所在星际环境中分子气体的分布情况,甚至基本地判明一些遗迹伽玛射线辐射轻强子作用属性等,都还有大量工作要做.本文将概述近年在以上相关各方面研究的进展情况.
[Abstract]:The discussion of the origin of cosmic rays is deepening with the development of the new generation of ground-based and space gamma ray telescope observations. As a commonly accepted supernova remnant of cosmic ray particles below the "knee" where energy is primarily accelerated, samples detected at the GE V / Te V energy range are continuously expanding and some indicative flow rates are being observed, The statistical characteristics of the energy spectrum are also shown. In order to prove that relativistic protons, as the main body of cosmic rays, can be accelerated by shock waves from supernova relic, the observation and theoretical study of gamma ray radiation from supernova remains are carried out. In particular, great progress has been made in the study of the hadron interaction of supernova remnants with molecular clouds, in which the characteristic bulge of the decay of 0 mesons in the vicinity of 70Me V is particularly remarkable. At present, the radiation mechanism of Hadron interaction can be divided into two categories: direct hit by proton in situ and "illuminated" molecular cloud by escape diffusion. However, a more systematic study of the gamma ray radiation of a large sample of supernova remains, including the rational model calculation of the gamma rays and multiband radiation spectra of the supernova remains, is carried out to clarify the distribution of molecular gases in the interstellar environment where these remnants are located. There is still a lot of work to be done to identify the light Hadron interaction properties of some trace gamma rays. This paper will summarize the progress of the research in the above related fields in recent years.
【作者单位】：南京大学天文与空间科学学院;南京大学现代天文与天体物理教育部重点实验室;
【基金】：国家自然科学基金(批准号:11233001) 国家重点基础研究发展计划(编号:2015CB857100) 教育部高校博士学科点专项科研基金(编号:20120091110048)资助项目
【分类号】：P145.3

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