项目名称: 超新星遗迹中的多波段非热辐射
项目编号: No.11303012
项目类型: 青年科学基金项目
立项/批准年度: 2014
项目学科: 数理科学和化学
项目作者: 唐云勇
作者单位: 昆明学院
项目金额: 28万元
中文摘要: 一般认为银河系的超新星遗迹是银河宇宙线的主要的源。目前已经探测到了来自许多超新星遗迹的从射电到 TeV 伽玛射线的辐射,而且不同年龄段的超新星遗迹呈现出不同的辐射特性。这些观测信息为研究超新星遗迹中的粒子加速及辐射机制奠定了坚实的观测基础。本项目拟使用超新星遗迹的多波段观测,基于含时注入模型和非线性激波加速,对中年和年轻超新星遗迹的辐射特性及其物理过程进行研究。同时,将通过详细的数值模拟以及与观测的比较,研究遗迹的动力学结构和粒子加速过程;在该数值模拟中,将考虑粒子自由逃逸、磁场反馈作用、共振流不稳定性、磁场放大效应、反向激波对粒子加速的贡献等物理过程。
中文关键词: 超新星遗迹;辐射机制;星际介质;粒子加速;伽马射线
英文摘要: Galactic cosmic rays are generally believed to come from supernova remnants in our Galaxy. The emissions from radio to TeV gamma ray have been detected in supernova remnants (SNRs), and these remnants present different radiation characteristics because of the age difference. These observations have provided much information for the study of the particle acceleration and radiation mechanism in supernova remnants. In this project,using multiband data,we will study the radiation characteristics and the physical processes in the middle-aged and young supernova remnants in the frame of the time-dependent particle injection and nonlinear shock acceleration models. At the same time, we will investigate the dynamic structures and particle acceleration processes in SNRs by detailedly numerical simulations, in this simulation, the physical processes are included: the free escape of particles, the feedack effect of magnetic field, resonance flow instability, magnetic field amplification, and the contribution of reverse shock to particle acceleration.
英文关键词: supernova remnants;radiation mechanisms;interstellar medium;acceleration of particles;gamma rays