论文标题
低$β$等离子体中的浆液主导的湍流重新连接
Plasmoid-dominated Turbulent Reconnection in a Low $β$ Plasma
论文作者
论文摘要
在低$β$背景血浆中，浆液为主导的湍流重新连接的性质通过电阻磁流失动力（MHD）模拟研究。在$β_ {\ rm in} <1 $制度中，其中$β_ {\ rm in} $是流入区域中的血浆$β$，重新连接位点由冲击和冲击相关的结构和质量压缩主导。有效的重新连接率从$ 0.01 $增加到$β_ {\ rm in} $降低。我们假设血浆压缩允许更快的重新连接速率，然后我们基于可压缩的MHD理论来估计一个加速因子。我们通过一系列MHD模拟来验证我们的预测。这些结果表明，在太阳能电晕中，浆液为主的重新连接的速度可能比$β\ ll 1 $环境的预期快两倍。
Properties of plasmoid-dominated turbulent reconnection in a low-$β$ background plasma are investigated by resistive magnetohydrodynamic (MHD) simulations. In the $β_{\rm in} < 1$ regime, where $β_{\rm in}$ is plasma $β$ in the inflow region, the reconnection site is dominated by shocks and shock-related structures and plasma compression is significant. The effective reconnection rate increases from $0.01$ to $0.02$ as $β_{\rm in}$ decreases. We hypothesize that plasma compression allows faster reconnection rate, and then we estimate a speed-up factor, based on a compressible MHD theory. We validate our prediction by a series of MHD simulations. These results suggest that the plasmoid-dominated reconnection can be twice faster than expected in the $β\ll 1$ environment in a solar corona.
