Origins of the Martian aurora observed by Spectroscopy for Investigation of Characteristics of the Atmosphere of Mars (SPICAM) on board Mars Express

被引：78
|
作者：
Leblanc, F.
Witasse, O.
Winningham, J.
Brain, D.
Lilensten, J.
Blelly, P. -L.
Frahm, R. A.
Halekas, J. S.
Bertaux, J. L.
机构：
[1] CNRS, Serv Aeron, Inst Pierre Simon Laplace, F-91371 Verrieres Le Buisson, France
[2] European Space Agcy, European Space Res & Technol Ctr, Res & Sci Support Dept, NL-2000 AG Noordwijk, Netherlands
[3] SW Res Inst, San Antonio, TX 78228 USA
[4] Univ Calif Berkeley, Space Sci Lab, Berkeley, CA 94720 USA
[5] Lab Planetol Grenoble, F-38041 Grenoble, France
[6] Lab Phys & Chim Environm, F-45071 Orleans, France
来源：
JOURNAL OF GEOPHYSICAL RESEARCH-SPACE PHYSICS | 2006年 / 111卷 / A9期
关键词：
D O I：
10.1029/2006JA011763
中图分类号：
P1 [天文学];
学科分类号：
0704 ;
摘要：
[ 1] On the 11 August 2004, the UV spectrograph Spectroscopy for Investigation of Characteristics of the Atmosphere of Mars (SPICAM) on board Mars Express made the first observation of auroral-type emission on the Martian nightside. In this paper, we describe the results of a new analysis of the observed emission owing to a better calibration of SPICAM UV channel and the use of all spectral information obtained during this observation. Several possibilities for the origin of this emission are discussed. We discussed, in particular, the possible exact geometry of the observation and the possible origins of the Martian aurorae. The emissions measured by SPICAM ultraviolet spectrometer have most probably been produced by electrons with an energy distribution peaking at few tens of eV rather than by electron distributions peaking above 100 eV.
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页数：9
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