TURBULENT RECONNECTION IN RELATIVISTIC PLASMAS AND EFFECTS OF COMPRESSIBILITY
TURBULENT RECONNECTION IN RELATIVISTIC PLASMAS AND EFFECTS OF COMPRESSIBILITY
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DOI：
10.1088/0004-637x/815/1/16
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发表时间：
2015-09
期刊：
影响因子：
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通讯作者：
M. Takamoto;T. Inoue;A. Lazarian
中科院分区：
文献类型：
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作者：
M. Takamoto;T. Inoue;A. Lazarian
本文利用三维相对论电阻磁流体力学模拟研究了湍流对相对论等离子体中磁场重联的影响。我们发现，由于湍流效应类似于非相对论的情况下，重新连接率成为独立的等离子体电阻率。我们还发现，可压缩湍流效应修改了非相对论不可压缩等离子体中预测的湍流重联率;当注入速度接近阿尔文速度时，重联率饱和，甚至衰减。我们的结果表明，当可压缩分量变为不可压缩模式的一半时，压缩性不能忽略，这发生在阿尔文马赫数达到约0.3时。所获得的最大重联率约为0.05-0.1，如果注入规模与片长度相当，则其将能够达到约0.1-0.2。
We report on the turbulence effects on magnetic reconnection in relativistic plasmas using three-dimensional relativistic resistive magnetohydrodynamics simulations. We found that the reconnection rate became independent of the plasma resistivity due to turbulence effects similarly to non-relativistic cases. We also found that compressible turbulence effects modified the turbulent reconnection rate predicted in non-relativistic incompressible plasmas; the reconnection rate saturates, and even decays, as the injected velocity approaches to the Alfvén velocity. Our results indicate that compressibility cannot be neglected when a compressible component becomes about half of the incompressible mode, occurring when the Alfvén Mach number reaches about 0.3. The obtained maximum reconnection rate is around 0.05–0.1, which will be able to reach around 0.1–0.2 if injection scales are comparable to the sheet length.