Quadrupolar pattern of the asymmetric guide-field reconnection

被引：52

作者：

Peng, F. Z. ^{[1
]}

Fu, H. S. ^{[1
]}

Cao, J. B. ^{[1
]}

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

Chen, Z. Z. ^{[1
]}

Cao, D. ^{[1
]}

Xu, Y. ^{[1
]}

Huang, S. Y. ^{[3
]}

Wang, T. Y. ^{[1
]}

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

Andre, M. ^{[2
]}

Russell, C. T. ^{[4
]}

Giles, B. ^{[5
]}

Lindqvist, P. -A. ^{[6
]}

Torbert, R. B. ^{[7
,8
]}

Ergun, R. E. ^{[9
]}

Burch, J. L. ^{[10
]}

机构：

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

[2] Swedish Inst Space Phys, Uppsala, Sweden

[3] Wuhan Univ, Sch Elect & Informat, Wuhan, Peoples R China

[4] Univ Calif Los Angeles, Inst Geophys & Planetary Phys, Los Angeles, CA 90024 USA

[5] NASA, Goddard Space Flight Ctr, Greenbelt, MD USA

[6] Royal Inst Technol, Stockholm, Sweden

[7] Univ New Hampshire, Dept Phys, Durham, NH 03824 USA

[8] Univ New Hampshire, Ctr Space Sci, Durham, NH 03824 USA

[9] Univ Colorado Boulder, Dept Astrophys & Planetary Sci, Boulder, CO USA

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

来源：

JOURNAL OF GEOPHYSICAL RESEARCH-SPACE PHYSICS | 2017年 / 122卷 / 06期

关键词：

reconnection at magnetopause; number density asymmetry; moderate guide field; Alfvenic plasma jet; quadrupolar Hall pattern; MAGNETIC RECONNECTION; EARTHS MAGNETOTAIL; DIFFUSION REGION; CURRENT SHEET; WAVES; MMS;

D O I：

10.1002/2016JA023666

中图分类号：

P1 [天文学];

学科分类号：

0704 ;

摘要：

With high-resolution data of the recently launched Magnetospheric Multiscale mission, we report a magnetic reconnection event at the dayside magnetopause. This reconnection event, having a density asymmetry N-high/N-low approximate to 2 on the two sides of the reconnecting current sheet and a guide field B-g approximate to 0.4B(0) in the out-of-plane direction, exhibit all the two-fluid features: Alfvenic plasma jets in the outflow region, bipolar Hall electric fields toward the current sheet center, quadrupolar Hall magnetic fields in the out-of-plane direction, and the corresponding Hall currents. Obviously, the density asymmetry N-high/N-low approximate to 2 and the guide field B-g approximate to 0.4B(0) are not sufficient to dismiss the quadrupolar pattern of Hall reconnection. This is different from previous simulations, where the bipolar pattern of Hall reconnection was suggested.

引用

页码：6349 / 6356

页数：8

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