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首页> 外文期刊>Geophysical Research Letters >Regions associated with electron physics in asymmetric magnetic field reconnection
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Regions associated with electron physics in asymmetric magnetic field reconnection

机译:非对称磁场重连接中与电子物理相关的区域

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Spatial relationships between regions containing signatures of electron physics in asymmetric reconnection with a guide field are examined using simulations and space observations that are in excellent agreement. These electron physics regions do not completely overlap, are not confined to sizes~electron skin depth, and do not surround the X-line. The electron ideal Ohm's law, E + U_e × B = 0, is violated over many ion inertia lengths in the outflow direction. Thus, pressure terms and, to a lesser extent, inertia terms in the Generalized Ohm's Law are important in producing electron physics on ion scales. Parallel electric fields that are necessary but not sufficient for reconnection are found in the simulation and in space on ion scales in the outflow direction. They account for ~10% of j _ E, averaged over the current sheet. The electron exhaust jet exists over a shorter length for asymmetric reconnection than it does for symmetric reconnection.
机译:使用模拟和空间观测非常一致地检查了包含电子物理特征的区域在与引导场的不对称重新连接中的空间关系。这些电子物理区域不完全重叠,不限于尺寸〜电子趋肤深度,也不围绕X线。电子理想欧姆定律E + U_e×B = 0,在流出方向的许多离子惯性长度上都被违反。因此,广义欧姆定律中的压力项以及较小程度的惯性项对于产生离子级的电子物理学很重要。在仿真中以及在离子尺度上的空间中,在流出方向上发现了重新连接所需但不充分的平行电场。它们占j _ E的〜10%,是当前工作表的平均值。与不对称重新连接相比,不对称重新连接时电子排气射流的长度更短。

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