Magnetospheric Multiscale Observations of the Electron Diffusion Region of Large Guide Field Magnetic Reconnection

被引：80

作者：

Eriksson, S. ^{[1
]}

Wilder, F. D. ^{[1
]}

Ergun, R. E. ^{[1
,2
]}

Schwartz, S. J. ^{[1
,3
]}

Cassak, P. A. ^{[4
]}

Burch, J. L. ^{[5
]}

Chen, L. -J. ^{[6
]}

Torbert, R. B. ^{[5
,7
]}

Phan, T. D. ^{[8
]}

Lavraud, B. ^{[9
,10
]}

Goodrich, K. A. ^{[1
,2
]}

Holmes, J. C. ^{[1
,2
]}

Stawarz, J. E. ^{[1
,2
]}

Sturner, A. P. ^{[1
,2
]}

Malaspina, D. M. ^{[1
]}

Usanova, M. E. ^{[1
]}

Trattner, K. J. ^{[1
]}

Strangeway, R. J. ^{[11
]}

Russell, C. T. ^{[11
]}

Pollock, C. J. ^{[12
]}

Giles, B. L. ^{[12
]}

Hesse, M. ^{[12
]}

Lindqvist, P. -A. ^{[13
]}

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

Shay, M. A. ^{[14
]}

Nakamura, R. ^{[15
]}

Marklund, G. T. ^{[13
]}

机构：

[1] Univ Colorado, Lab Atmospher & Space Phys, Boulder, CO 80303 USA

[2] Univ Colorado, Dept Astrophys & Planetary Sci, Boulder, CO 80303 USA

[3] Imperial Coll, Blackett Lab, London SW7 2AZ, England

[4] W Virginia Univ, Morgantown, WV 26506 USA

[5] SW Res Inst, San Antonio, TX 78238 USA

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

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

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

[9] Univ Toulouse, Inst Rech Astrophys & Planetol, F-31028 Toulouse, France

[10] CNRS, UMR 5277, Toulouse, France

[11] Univ Calif Los Angeles, Los Angeles, CA 90095 USA

[12] NASA, Goddard Space Flight Ctr, Greenbelt, MD 20771 USA

[13] KTH Royal Inst Technol, SE-11428 Stockholm, Sweden

[14] Univ Delaware, Newark, DE 19716 USA

[15] Austrian Acad Sci, Space Res Inst, A-8042 Graz, Austria

来源：

PHYSICAL REVIEW LETTERS | 2016年 / 117卷 / 01期

关键词：

ASYMMETRIC RECONNECTION; EARTHS MAGNETOPAUSE; ACCELERATION;

D O I：

10.1103/PhysRevLett.117.015001

中图分类号：

O4 [物理学];

学科分类号：

0702 ;

摘要：

We report observations from the Magnetospheric Multiscale (MMS) satellites of a large guide field magnetic reconnection event. The observations suggest that two of the four MMS spacecraft sampled the electron diffusion region, whereas the other two spacecraft detected the exhaust jet from the event. The guide magnetic field amplitude is approximately 4 times that of the reconnecting field. The event is accompanied by a significant parallel electric field (E-parallel to)that is larger than predicted by simulations. The high-speed (similar to 300 km/s) crossing of the electron diffusion region limited the data set to one complete electron distribution inside of the electron diffusion region, which shows significant parallel heating. The data suggest that E-parallel to is balanced by a combination of electron inertia and a parallel gradient of the gyrotropic electron pressure.

引用

页数：6

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