标题： 离子声不稳定在磁重联中的作用 显示英文标题

标题： Role of ion acoustic instability in magnetic reconnection

摘要： 我们报道了一项关于不同初始离子-电子温度比的等离子体磁重联的第一性原理数值研究。在该比例显著低于1的情况下，我们在扩散区内观察到了强烈的波动活动，这是由离子声波不稳定性驱动的。我们的分析表明，这种不稳定性主要的宏观效应是驱动显著的离子加热。与之前报告显著异常电阻率的研究相反，我们发现由于离子声波不稳定性引起的异常贡献可以忽略不计。这些结果揭示了该不稳定性对重联过程的动力学影响，为无碰撞重联的基本物理提供了新的见解。 显示英文摘要

摘要： We report on a first-principles numerical study of magnetic reconnection in plasmas with different initial ion-to-electron temperature ratios. In cases where this ratio is significantly below unity, we observe intense wave activity in the diffusion region, driven by the ion-acoustic instability. Our analysis shows that the dominant macroscopic effect of this instability is to drive substantial ion heating. In contrast to earlier studies reporting significant anomalous resistivity, we find that anomalous contributions due to the ion-acoustic instability are minimal. These results shed light on the dynamical impact of this instability on reconnection processes, offering new insights into the fundamental physics governing collisionless reconnection.