Current structure and flow pattern on the electron separatrix in reconnection region

doi:10.1186/s40562-017-0085-4

	Current structure and flow pattern on the electron separatrix in reconnection region
	Guo,Ruilong 1,2; Pu,Zuyin 2; Wei,Yong 1
刊名	Geoscience Letters
	2017-09-06
卷号	4 期号:1
关键词	Magnetic reconnection Separatrix region Electron separatrix Diamagnetic current Electron nongyrotropy Finite gyroradius Effect
ISSN号	2196-4092
DOI	10.1186/s40562-017-0085-4
英文摘要	AbstractResults from 2.5D Particle-in-cell (PIC) simulations of symmetric reconnection with negligible guide field reveal that the accessible boundary of the electrons accelerated in the magnetic reconnection region is displayed by enhanced electron nongyrotropy downstream from the X-line. The boundary, hereafter termed the electron separatrix, occurs at a few de (electron inertial length) away from the exhaust side of the magnetic separatrix. On the inflow side of the electron separatrix, the current is mainly carried by parallel accelerated electrons, served as the inflow region patch of the Hall current. The out-of-plane current density enhances at the electron separatrix. The dominating current carriers are the electrons, nongyrotropic distribution functions of which contribute significantly to the perpendicular electron velocity by increasing the electron diamagnetic drift velocity. When crossing the separatrix region where the Hall electric field is enhanced, electron velocity orientation is changed dramatically, which could be a diagnostic indicator to detect the electron separatrix. In the exhaust region, ions are the main carriers for the out-of-plane current, while the parallel current is still mainly carried by electrons. The current density peak in the separatrix region implies that a thin current sheet is formed apart from the neutral line, which can evolve to the bifurcated current sheet.
语种	英语
出版者	Springer International Publishing
WOS记录号	BMC:10.1186/S40562-017-0085-4
内容类型	期刊论文
源URL	[http://ir.iggcas.ac.cn/handle/132A11/64178]
专题	中国科学院地质与地球物理研究所
通讯作者	Guo,Ruilong
作者单位	1. 2.
推荐引用方式 GB/T 7714	Guo,Ruilong,Pu,Zuyin,Wei,Yong. Current structure and flow pattern on the electron separatrix in reconnection region[J]. Geoscience Letters,2017,4(1).
APA	Guo,Ruilong,Pu,Zuyin,&Wei,Yong.(2017).Current structure and flow pattern on the electron separatrix in reconnection region.Geoscience Letters,4(1).
MLA	Guo,Ruilong,et al."Current structure and flow pattern on the electron separatrix in reconnection region".Geoscience Letters 4.1(2017).