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首页> 外文期刊>Journal of Geophysical Research, A. Space Physics: JGR >Slow shock formation and structure with sub-Alfvénic shear flow in magnetic reconnection
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Slow shock formation and structure with sub-Alfvénic shear flow in magnetic reconnection

机译:磁重连接中亚铝剪切流的缓慢冲击形成和结构

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摘要

Slow shock formation and structure associated with magnetic reconnection are investigated in the presence of sub-Alfvénic shear flow using a compressible resistive MHD model. It is found for the first time that one or two pairs of the slow shocks are formed in the inflow region away from the reconnection separatrices within compressible resistive MHD. The distributions of the slow shocks depend largely on the plasma beta and the shear flow velocity that lead to the increase of magnetic reconnection rate. One pair of the slow shocks is formed for β=0.2 and two pairs of the slow shocks are generated for β=1.0 with the shear flow velocity in the range 0.6 V _A to 0.9 V _A. For high plasma beta (β=5.0), there is no slow shock formed outside the reconnection separatrices. The results can be applied to interpret slow shock observations at the dayside magnetopause.
机译:使用可压缩的电阻MHD模型,在亚阿尔弗尼奇切变流的存在下研究了与磁重联相关的慢速冲击形成和结构。首次发现在可压缩电阻MHD中远离重新连接分离线的流入区域中形成了一对或两对缓慢冲击。慢速冲击的分布在很大程度上取决于等离子体β和剪切流速度,从而导致磁重联速度增加。对于β= 0.2形成一对慢冲击,并且对于β= 1.0产生两对慢冲击,剪切流速在0.6V_A至0.9V_A的范围内。对于高血浆β(β= 5.0),在重新连接分离体外部没有形成缓慢的冲击。该结果可用于解释日间磁更年期的慢震观察。

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