Fine Structures of the Electron Current Sheet in Magnetotail Guide-Field Reconnection

被引：7

作者：

Tang, B. -B. ^{[1
]}

Li, W. Y. ^{[1
]}

Khotyaintsev, Yu. V. ^{[2
]}

Graham, D. B. ^{[2
]}

Gao, C. H. ^{[1
,3
]}

Chen, Z. Z. ^{[4
]}

Fu, H. S. ^{[4
]}

Lu, Q. M. ^{[5
]}

Wang, C. ^{[1
,3
]}

Burch, J. L. ^{[6
]}

机构：

[1] Chinese Acad Sci, Natl Space Sci Ctr, State Key Lab Space Weather, Beijing, Peoples R China

[2] Swedish Inst Space Phys, Uppsala, Sweden

[3] Univ Chinese Acad Sci, Coll Earth & Planetary Sci, Beijing, Peoples R China

[4] Beihang Univ, Sch Space & Environm, Beijing, Peoples R China

[5] Univ Sci & Technol China, Dept Geophys & Planetary Sci, CAS Key Lab Geospace Environm, Hefei, Peoples R China

[6] Southwest Res Inst, San Antonio, TX USA

来源：

GEOPHYSICAL RESEARCH LETTERS | 2022年 / 49卷 / 09期

基金：

中国国家自然科学基金;

关键词：

REGION; JET;

D O I：

10.1029/2021GL097573

中图分类号：

P [天文学、地球科学];

学科分类号：

07 ;

摘要：

We investigate fine structures of the electron current sheet in magnetotail guide-field reconnection using Magnetospheric Multiscale observations. This current sheet, observed in the outer electron diffusion region (EDR) of reconnection, is featured by clear bifurcation and deflection, and also has complicated fine sublayers. The formation of these sublayers is closely related to streaming and meandering electrons, which are facilitated by the reconnection guide field. In particular, in the sublayer around the B-L reversal, the meandering electrons, which usually move along the out-of-plane (M) direction, are strongly distorted into the v(L)-v(N) plane due to the finite B-M component. The low frequency fluctuation of this current sheet is also revealed, contributing similar to 3% of the reconnection electric field by the anomalous effect. We suggest that such current sheet fluctuations, possibly driven by the magnetic double-gradient instability, can be characteristic in the outer EDR.

引用

页数：9

共 15 条

[11] Electron-Scale Current Sheets Observed by MMS in the Plasma Sheet of the Magnetotail during Bursty Bulk Flows
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[12] Magnetospheric Multiscale Mission Observations of Lower-hybrid Drift Waves in Terrestrial Magnetotail Reconnection with Moderate Guide Field and Asymmetric Plasma Density
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[13] Transition from Vortical to Alfvenic-like Fermi Electron Acceleration in Magnetic Reconnection with Increasing Guide Field
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[14] FAST MAGNETIC RECONNECTION AND PARTICLE ACCELERATION IN RELATIVISTIC LOW-DENSITY ELECTRON-POSITRON PLASMAS WITHOUT GUIDE FIELD
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[15] Magnetospheric Multiscale Satellite Observations of Parallel Electron Acceleration in Magnetic Field Reconnection by Fermi Reflection from Time Domain Structures
Mozer, F. S.
Agapitov, O. A.
Artemyev, A.
Burch, J. L.
Ergun, R. E.
Giles, B. L.
Mourenas, D.
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Vasko, I.
PHYSICAL REVIEW LETTERS, 2016, 116 (14)

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