Evidence for collisionless magnetic reconnection at Mars

被引：95

作者：

Eastwood, J. P. ^{[1
]}

Brain, D. A. ^{[1
]}

Halekas, J. S. ^{[1
]}

Drake, J. F. ^{[2
]}

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

Oieroset, M. ^{[1
]}

Mitchell, D. L. ^{[1
]}

Lin, R. P. ^{[1
]}

Acuna, M. ^{[3
]}

机构：

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

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

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

来源：

GEOPHYSICAL RESEARCH LETTERS | 2008年 / 35卷 / 02期

关键词：

D O I：

10.1029/2007GL032289

中图分类号：

P [天文学、地球科学];

学科分类号：

07 ;

摘要：

Using data from Mars Global Surveyor (MGS) in combination with Particle-In-Cell (PIC) simulations of reconnection, we present the first direct evidence of collisionless magnetic reconnection at Mars. The evidence indicates that the spacecraft passed through the diffusion region where reconnection is initiated and observed the magnetic field signatures of differential electron and ion motion - the Hall magnetic field - that uniquely indicate the reconnection process. These are the first such in-situ reconnection observations at an astronomical body other than the Earth. Reconnection may be the source of Mars' recently discovered auroral activity and the changing boundaries of the closed regions of crustal magnetic field.

引用

页数：5

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