五矩双流体电子-正电子等离子体中的无碰撞磁重联
Collisionless Magnetic Reconnection in a Five-Moment Two-Fluid Electron-Positron Plasma
AI总结：
使用各向同性压力的无碰撞双流体模型模拟电子-正电子等离子体磁重联，发现缺乏数值扩散时不会发生快速重联，与存在霍尔效应或各向异性压力的情形形成对比。
摘要：
我们使用各向同性压力的无碰撞双流体模型模拟电子-正电子（对）等离子体中的磁重联。在该模型中，欧姆定律旋度中的电阻、霍尔和电动压力项缺失，仅剩惯性项提供磁重联。我们的模拟表明，对于使用各向同性压力模拟的对等离子体，在没有足够（数值）扩散的情况下不会发生快速重联。我们将此结果与模拟和已发表的结果进行对比，这些结果显示在具有各向同性压力和非抵消质荷比的无碰撞双流体等离子体中存在快速重联，其中霍尔效应存在且数值扩散很小；并与已发表的对等离子体PIC研究进行对比，这些研究观察到快速重联并将其归因于非各向同性压力。
英文摘要：
We simulate magnetic reconnection in electron-positron (pair) plasma using a collisionless two-fluid model with isotropic pressure. In this model the resistive, Hall, and electrokinetic pressure terms are absent from the curl of Ohm's law, leaving the inertial term alone to provide for magnetic reconnection. Our simulations suggest that for pair plasma simulated with isotropic pressure fast reconnection does not occur without the aid of sufficient (numerical) diffusion. We contrast this result with simulations and published results showing fast reconnection for collisionless two-fluid plasma with isotropic pressures and non-canceling mass-to-charge ratios, where Hall effects are present and numerical diffusion is small, and with published PIC studies of pair plasma which observe fast reconnection and attribute it to nonisotropic pressure.
机构、总结、中文摘要均由AI分析而来，可能存在错误，请以论文正文为准。
