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首页> 外文期刊>Journal of Geophysical Research, A. Space Physics: JGR >Hybrid simulations of magnetic reconnection initiated in the magnetosheath
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Hybrid simulations of magnetic reconnection initiated in the magnetosheath

机译：混合模拟磁场重联的磁鞘中发起

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摘要

Interaction of solar wind tangential discontinuities (TDs) with the bow shock mayinitiate reconnection in the magnetosheath. We employ 2.5-D electromagnetic, hybridsimulations that treat the ions kinetically via particle-in-cell methods and the electrons as amassless fluid to study this interaction. We present results from eight runs correspondingto TD thicknesses ranging from 10 to 260 ion skin depths and shear angles ranging from120° to 180°. Our results indicate a transition from time-dependent to steady statereconnection as the thickness of the solar wind TD increases above 30 ion skin depths. Asthe shear angle in the magnetic field decreases, it takes longer to initiate reconnection, andreconnection jet speeds diminish, suggesting a lower reconnection rate. Implications ofthese results for magnetic reconnection at currents sheets in general and at themagnetopause in particular are also discussed.
机译：太阳风切向的相互作用与弓形激波间断(TDs)磁鞘mayinitiate重新连接。采用2.5 - d电磁,hybridsimulations治疗的离子活动通过particle-in-cell方法和电子amassless流体研究这种交互。现在结果八correspondingto运行TD厚度从10到260离子的皮肤深度和剪切角不等from120°- 180°。我们的研究结果表明过渡时间稳定statereconnection作为太阳风TD厚度增加超过30离子皮肤深处。磁场减少,需要更长的时间启动重新连接,andreconnection喷射速度减少,这表明重联率较低。磁影响这些结果重新连接在电流表一般特别是themagnetopause也进行了讨论。

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