On the Gradient of the Electron Pressure in Anti-Parallel Magnetic Reconnection
WANG Huan-Yu, HUANG Can**, LU Quan-Ming, WANG Shui
CAS Key Laboratory of Geospace Environment, Department of Geophysics and Planetary Science, University of Science and Technology of China, Hefei 230026
Abstract：We first perform a two-dimensional particle-in-cell simulation of anti-parallel magnetic reconnection to verify that in the electron diffusion region the reconnection electric field is mainly balanced by the gradient of the electron pressure. Then, by following typical electron trajectories in the fixed electromagnetic field of anti-parallel reconnection, we calculate the gradient of the electron pressure. We find that the resulted gradient of the electron pressure is equal to the reconnection electric field. This indicates that in the electron diffusion region the reconnection electric field is balanced by the gradient of the electron pressure, which results from the electron nongyrotropic motions. Our result gives a microphysical explanation of the balance between the reconnection electric field and the gradient of the electron pressure.
. [J]. 中国物理快报, 2015, 32(4): 45201-045201.
WANG Huan-Yu, HUANG Can, LU Quan-Ming, WANG Shui. On the Gradient of the Electron Pressure in Anti-Parallel Magnetic Reconnection. Chin. Phys. Lett., 2015, 32(4): 45201-045201.
2015, Vol. 32 
