Energetic electron asymmetries at Mars:: ASPERA-3 observations

被引：2

作者：

Roussos, E. ^{[1
]}

Fraenz, M. ^{[1
]}

Dubinin, E. ^{[1
]}

Martinecz, C. ^{[1
]}

Woch, J. ^{[1
]}

Motschmann, U. ^{[2
]}

Winningham, J. D. ^{[3
]}

Frahm, R. A. ^{[3
]}

Barabash, S. ^{[4
]}

Lundin, R. ^{[4
]}

机构：

[1] Max Planck Inst Sonnensyst Forsch, D-37191 Katlenburg Lindau, Germany

[2] TU Braunschweig, Inst Theoret Phys, Braunschweig, Germany

[3] SW Res Inst, San Antonio, TX USA

[4] Swedish Inst Space Phys, S-98128 Kiruna, Sweden

来源：

PLANETARY AND SPACE SCIENCE | 2008年 / 56卷 / 06期

关键词：

Mars; magnetosphere; asymmetries; crustal fields; energetic electrons; ASPERA-3;

D O I：

10.1016/j.pss.2007.12.009

中图分类号：

P1 [天文学];

学科分类号：

0704 ;

摘要：

Energetic electron fluxes from more than two years of ASPERA-3 observations are organized in different coordinate systems for the investigation of asymmetries in the global dynamics of the Martian magnetosphere. A clear asymmetry is found in the distribution of high-flux events with respect to the solar wind convective electric field (E-sw) direction. These events are frequently detected below the average magnetic pile-up boundary (MPB) location at the terminator region of the hemisphere to which the E-sw points and extend toward the tail. A detailed investigation of the electron fluxes at the terminator region also reveals that the largest contribution to this E-sw asymmetry comes from locations of moderate or strong crustal fields. These observations have implications about reconnection processes in the terminator and provide new insight on magnetic anomaly effects in the global dynamics of the Mars-solar wind interaction. (c) 2007 Elsevier Ltd. All rights reserved.

引用

页码：836 / 839

页数：4

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