| PHYSICS OF GASES, PLASMAS, AND ELECTRIC DISCHARGES |
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How Does the Guide Field Affect the Asymmetry of Hall Magnetic and Electric Fields in Fast Magnetic Reconnection? |
| LAI Xiang-Sheng1, ZHOU Meng1**, DENG Xiao-Hua1, LI Tang-Mu1, HUANG Shi-Yong2 |
1Institute of Space Science and Technology, Nanchang University, Nanchang 330031
2School of Electronic and Information, Wuhan University, Wuhan 430072
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| Cite this article: |
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LAI Xiang-Sheng, ZHOU Meng, DENG Xiao-Hua et al 2015 Chin. Phys. Lett. 32 095202 |
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Abstract 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.
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Received: 03 December 2014
Published: 02 October 2015
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