First Observation of Magnetic Flux Rope Inside Electron Diffusion Region

被引：20
作者：
Chen, Z. Z. [1 ,2 ]
Fu, H. S. [1 ,2 ]
Wang, Z. [1 ,2 ]
Guo, Z. Z. [1 ,2 ]
Xu, Y. [1 ,2 ]
Liu, C. M. [1 ,2 ]
机构：
[1] Beihang Univ, Sch Space & Environm, Beijing, Peoples R China
[2] Minist Ind & Informat Technol, Key Lab Space Environm Monitoring & Informat Proc, Beijing, Peoples R China
来源：
GEOPHYSICAL RESEARCH LETTERS | 2021年 / 48卷 / 07期
基金：
中国博士后科学基金;
关键词：
electron diffusion region; magnetic flux rope; magnetic reconnection; PARTICLE-ACCELERATION; DIPOLARIZATION FRONTS; ENERGY-DISSIPATION; MMS OBSERVATIONS; RECONNECTION; NULLS; TURBULENCE; TOPOLOGY; ISLAND;
D O I：
10.1029/2020GL089722
中图分类号：
P [天文学、地球科学];
学科分类号：
07 ;
摘要：
Magnetic flux ropes (MFRs) play a crucial role during magnetic reconnection. They are believed to be primarily generated by tearing mode instabilities in the electron diffusion region (EDR). However, they have never been observed inside the EDR. Here, we present the first observation of an MFR inside an EDR. The bifurcated nonforce-free MFR, with a width of similar to 27.5 d(e) in the L direction and similar to 4.8 d(e) in the N direction, was moving away from the X-line. Inside the MFR, strong energy dissipation was detected. The MFR can modulate the electric field in the EDR. We reconstructed magnetic topology of the electron-scale MFR. Our study promotes understanding of MRFs' initial state and its role in electron-scale processes during magnetic reconnection.
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页数：10
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