Magnetic reconnection and cold plasma at the magnetopause
Magnetic reconnection and cold plasma at the magnetopause
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DOI：
10.1029/2010gl044611
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发表时间：
2010-11
影响因子：
5.2
通讯作者：
M. André;A. Vaivads;Y. Khotyaintsev;T. Laitinen;H. Nilsson;G. Stenberg;A. Fazakerley;J. Trotignon
中科院分区：
文献类型：
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作者：
M. André;A. Vaivads;Y. Khotyaintsev;T. Laitinen;H. Nilsson;G. Stenberg;A. Fazakerley;J. Trotignon
我们报告的详细观测的四个集群航天器的磁重联和磁通量转移事件（FTE）在磁层顶。我们探测冷（eV）等离子体在磁层顶与两个独立的方法。我们表明，冷离子可以是必不可少的电场垂直于电流片在分界线区域的边缘的FTE和相关的加速离子从磁层到重联射流。冷离子有足够小的回旋半径，可以在有限的分界线区域内漂移，法向电场可以通过这种漂移来平衡，E −v × B。分界线区域还包括冷加速电子，作为重联电流电路的一部分。
We report on detailed observations by the four Cluster spacecraft of magnetic reconnection and a Flux Transfer Event (FTE) at the magnetopause. We detect cold (eV) plasma at the magnetopause with two independent methods. We show that the cold ions can be essential for the electric field normal to the current sheet in the separatrix region at the edge of the FTE and for the associated acceleration of ions from the magnetosphere into the reconnection jet. The cold ions have small enough gyroradii to drift inside the limited separatrix region and the normal electric field can be balanced by this drift, E ≈ −v × B. The separatrix region also includes cold accelerated electrons, as part of the reconnection current circuit.