Magnetic reconnection with asymmetry in the outflow direction

N. A. Murphy; C. R. Sovinec; P. A. Cassak

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Magnetic reconnection with asymmetry in the outflow direction

机译：磁重联的不对称流出的方向

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摘要

Magnetic reconnection with asymmetry in the outflow direction occurs in the Earth's magnetotail, coronal mass ejections, flux cancellation events, astrophysical disks, spheromak merging experiments, and elsewhere in nature and the laboratory. A control volume analysis is performed for the case of steady antiparallel magnetic reconnection with asymmetric downstream pressure to derive scaling relations for the outflow velocity from each side of the current sheet and the reconnection rate. Simple relationships for outflow velocity are presented for the incompressible case and the case of symmetric downstream pressure but asymmetric downstream density. Asymmetry alone is not found to greatly affect the reconnection rate. The flow stagnation point and magnetic field null do not coincide in a steady state unless the pressure gradient is negligible at the flow stagnation point. The predictions of the model are compared with resistive MHD simulations of driven reconnection with asymmetry in the outflow direction.

机译：磁重联的不对称流出方向发生在地球上的磁尾,日冕物质抛射,通量取消事件、天体物理磁盘spheromak融合实验,和其他地区自然和实验室。执行分析的情况稳定与磁场重联反平行的不对称的下游压力得到扩展从双方关系流出速度当前表和重联率。简单的流出速度的关系对于不可压缩的情况,但对称的下游压力不对称下游密度。没有发现极大地影响重新连接率。场零稳态不一致除非压力梯度可以忽略不计的流驻点。模型与电阻磁流体动力模拟与不对称驱动重新连接流出的方向。

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来源
《Journal of Geophysical Research, A. Space Physics: JGR》 |2010年第9期|A09206:1-A09206:13|共13页
作者
N. A. Murphy; C. R. Sovinec; P. A. Cassak;
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作者单位

Center for Magnetic Self-Organization in Laboratory and Astrophysical Plasmas, University of Wisconsin--Madison, Madison, Wisconsin, USA;

Department of Physics, West Virginia University, Morgantown, West Virginia, USA;

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原文格式 PDF
正文语种英语
中图分类
关键词
magnetic reconnection; stagnation point; outflow;

机译：磁重联;停滞点;流出;

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Magnetic reconnection with asymmetry in the outflow direction

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