论文标题
年轻超新星残留物的非依赖性垂直冲击的动力学模拟。 iii。磁重新连接
Kinetic simulations of nonrelativistic perpendicular shocks of young supernova remnants. III. Magnetic reconnection
论文作者
论文摘要
完全动力学的二维粒子模拟用于研究高弹药非遗物垂直激流的电子加速度。 SNR冲击是由微小的不稳定性介导的，这是由于冲击反射和上游离子之间的相互作用而激发的。芯片不稳定性的非线性进化会导致当前表的形成。在湍流冲击斜坡上，电流板通过磁重新连接腐烂。重新连接位点的数量在很大程度上取决于离子与电子质量比和模拟冲击的alfvénic马赫数。在磁重新连接运行的位置观察到电子加速度。对于最高的质量比，几乎所有电子都参与磁重新连接，这使得磁重新连接在这些冲击处的电子的主要加速过程。我们讨论了我们的结果与具有逼真的离子与电子质量比的3D系统的相关性。
Fully kinetic two-dimensional particle-in-cell simulations are used to study electron acceleration at high-Mach-number nonrelativistic perpendicular shocks. SNR shocks are mediated by the Weibel instability which is excited because of an interaction between shock-reflected and upstream ions. Nonlinear evolution of the Weibel instability leads to the formation of current sheets. At the turbulent shock ramp the current sheets decay through magnetic reconnection. The number of reconnection sites strongly depends on the ion-to-electron mass ratio and the Alfvénic Mach number of the simulated shock. Electron acceleration is observed at locations where magnetic reconnection operates. For the highest mass ratios almost all electrons are involved in magnetic reconnection, which makes the magnetic reconnection the dominant acceleration process for electrons at these shocks. We discuss the relevance of our results for 3D systems with realistic ion-to-electron mass ratio.
