标题： 爆炸物团块和加速宇宙射线的反作用在超新星遗迹演化中的作用 显示英文标题

标题： Role of ejecta clumping and back-reaction of accelerated cosmic rays in the evolution of supernova remnants

摘要： 年轻超新星遗迹(SNR)激波后的区域的热结构受到两种主要物理效应的严重影响，即加速宇宙射线(CRs)的反作用以及在抛射物和激波后的星际介质(ISM)之间的接触不连续面上发展的瑞利-泰勒(RT)不稳定性。 在这里，我们通过详细的三维MHD建模来研究这两种物理机制在SNRs演化中的作用。 我们的模型描述了遗迹在磁化ISM中的膨胀，包括初始抛射物的团块化以及由于加速CRs的反作用对激波动力学的影响。 我们讨论了初始抛射物团块化在发展接触不连续面上强不稳定性中的作用，这些不稳定性可能扩展到主激波上游及更远的地方。 显示英文摘要

摘要： The thermal structure of the post-shock region of a young supernova remnant (SNR) is heavily affected by two main physical effects, the back-reaction of accelerated cosmic rays (CRs) and the Rayleigh-Taylor (RT) instabilities developing at the contact discontinuity between the ejecta and the shocked interstellar medium (ISM). Here, we investigate the role played by both physical mechanisms in the evolution of SNRs through detailed 3D MHD modeling. Our model describes the expansion of the remnant through a magnetized ISM, including consistently the initial ejecta clumping and the effects on shock dynamics due to back-reaction of accelerated CRs. We discuss the role of the initial ejecta clumpiness in developing strong instabilities at the contact discontinuity which may extend upstream to the main shock and beyond.