MMS observations of large guide field symmetric reconnection between colliding reconnection jets at the center of a magnetic flux rope at the magnetopause

被引：85

作者：

Oieroset, M. ^{[1
]}

Phan, T. D. ^{[1
]}

Haggerty, C. ^{[2
]}

Shay, M. A. ^{[2
]}

Eastwood, J. P. ^{[3
]}

Gershman, D. J. ^{[4
,5
]}

Drake, J. F. ^{[6
,7
]}

Fujimoto, M. ^{[8
]}

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

Mozer, F. S. ^{[1
]}

Oka, M. ^{[1
]}

Torbert, R. B. ^{[10
,11
]}

Burch, J. L. ^{[11
]}

Wang, S. ^{[4
,5
]}

Chen, L. J. ^{[4
,5
]}

Swisdak, M. ^{[12
]}

Pollock, C. ^{[13
]}

Dorelli, J. C. ^{[4
]}

Fuselier, S. A. ^{[14
]}

Lavraud, B. ^{[15
,16
]}

Giles, B. L. ^{[4
]}

Moore, T. E. ^{[4
]}

Saito, Y. ^{[8
]}

Avanov, L. A. ^{[4
,5
]}

Paterson, W. ^{[4
]}

Strangeway, R. J. ^{[17
]}

Russell, C. T. ^{[17
]}

Khotyaintsev, Y. ^{[18
]}

Lindqvist, P. A. ^{[19
]}

Malakit, K. ^{[20
]}

机构：

[1] Univ Calif Berkeley, Space Sci Lab, Berkeley, CA 94720 USA

[2] Univ Delaware, Dept Phys & Astron, Newark, DE 19716 USA

[3] Imperial Coll London, Blackett Lab, London, England

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

[5] Univ Maryland, Dept Astron, College Pk, MD 20742 USA

[6] Univ Maryland, Dept Phys, College Pk, MD 20742 USA

[7] Univ Maryland, Inst Phys Sci & Technol, College Pk, MD 20742 USA

[8] ISAS JAXA, Sagamihara, Kanagawa, Japan

[9] Univ Colorado, LASP, Boulder, CO 80309 USA

[10] Univ New Hampshire, Inst Study Earth Oceans & Space, Durnham, NH USA

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

[12] Univ Maryland, Inst Res Elect & Appl Phys, College Pk, MD 20742 USA

[13] Denali Sci, Healy, AK USA

[14] Univ Texas San Antonio, Dept Phys & Astron, San Antonio, TX USA

[15] Univ Toulouse, Inst Rech Astrophys & Planetol, Toulouse, France

[16] CNRS, Toulouse, France

[17] Univ Calif Los Angeles, Dept Earth Planetary & Space Sci, Los Angeles, CA USA

[18] Swedish Inst Space Phys, Uppsala, Sweden

[19] Royal Inst Technol, Stockholm, Sweden

[20] Mahidol Univ, Dept Phys, Bangkok, Thailand

来源：

GEOPHYSICAL RESEARCH LETTERS | 2016年 / 43卷 / 11期

关键词：

magnetic reconnection; particle acceleration; magnetopause; flux rope; magnetospheric multiscale; SOLAR-WIND; PLASMA; ACCELERATION;

D O I：

10.1002/2016GL069166

中图分类号：

P [天文学、地球科学];

学科分类号：

07 ;

摘要：

We report evidence for reconnection between colliding reconnection jets in a compressed current sheet at the center of a magnetic flux rope at Earth's magnetopause. The reconnection involved nearly symmetric inflow boundary conditions with a strong guide field of two. The thin (2.5 ion-skin depth (d(i)) width) current sheet (at similar to 12 d(i) downstream of the X line) was well resolved by MMS, which revealed large asymmetries in plasma and field structures in the exhaust. Ion perpendicular heating, electron parallel heating, and density compression occurred on one side of the exhaust, while ion parallel heating and density depression were shifted to the other side. The normal electric field and double out-of-plane (bifurcated) currents spanned almost the entire exhaust. These observations are in good agreement with a kinetic simulation for similar boundary conditions, demonstrating in new detail that the structure of large guide field symmetric reconnection is distinctly different from antiparallel reconnection.

引用

页码：5536 / 5544

页数：9

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