How Does the Guide Field Affect the Asymmetry of Hall Magnetic and Electric Fields in Fast Magnetic Reconnection

Recent studies show that the out-of-plane quadrupolar magnetic field in fast magnetic reconnection is distorted in the presence of a guide field. It is asymmetric with respect to the current sheet. In this work, we analyze the spatial and amplitude asymmetries of the Hall magnetic field By and the H...

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Published inChinese physics letters Vol. 32; no. 9; pp. 88 - 92
Main Author 赖相盛 周猛 邓晓华 李汤姆 黄狮勇
Format Journal Article
LanguageEnglish
Published 01.09.2015
Subjects
Amplitudes
Asymmetry
Current sheets
Distortion
Electric fields
Field strength
Magnetic fields
Particle in cell technique
不对称性
平面外
欧姆定律
磁场强度
磁重联
霍尔效应
霍尔电场
非对称性
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Summary:Recent studies show that the out-of-plane quadrupolar magnetic field in fast magnetic reconnection is distorted in the presence of a guide field. It is asymmetric with respect to the current sheet. In this work, we analyze the spatial and amplitude asymmetries of the Hall magnetic field By and the Hall electric field Ez in reconnection with different guide fields by a series of 2.5-D particle-in-cell simulations. We derive the relation between the asymmetry of By and Ez and the guide field strength. In addition, by analyzing the different terms in the generalized ohm＇s law, we find that the electric field Ez is mainly balanced by the Hall term, and the amplitude asymmetry is mainly caused by the Hall effect.
Bibliography:Recent studies show that the out-of-plane quadrupolar magnetic field in fast magnetic reconnection is distorted in the presence of a guide field. It is asymmetric with respect to the current sheet. In this work, we analyze the spatial and amplitude asymmetries of the Hall magnetic field By and the Hall electric field Ez in reconnection with different guide fields by a series of 2.5-D particle-in-cell simulations. We derive the relation between the asymmetry of By and Ez and the guide field strength. In addition, by analyzing the different terms in the generalized ohm＇s law, we find that the electric field Ez is mainly balanced by the Hall term, and the amplitude asymmetry is mainly caused by the Hall effect.
11-1959/O4
LAI Xiang-Sheng, ZHOU Meng, DENG Xiao-Hua, LI Tang-Mu, HUANG Shi-Yong（ 1Institute of Space Science and Technology, Nanchang University, Nanchang 330031 2School of Electronic and Information, Wuhan University, Wuhan 430072）
ObjectType-Article-1
SourceType-Scholarly Journals-1
ObjectType-Feature-2
content type line 23
ISSN:0256-307X
1741-3540
DOI:10.1088/0256-307X/32/9/095202