Observations of the Proton Aurora on Mars With SPICAM on Board Mars Express

被引：38
|
作者：
Ritter, B. [1 ,2 ]
Gerard, J-C. [1 ]
Hubert, B. [1 ]
Rodriguez, L. [2 ]
Montmessin, F. [3 ]
机构：
[1] Univ Liege, LPAP, Liege, Belgium
[2] Royal Observ Belgium, Brussels, Belgium
[3] Univ Versailles St Quentin En Yvelines, LATMOS CNRS IPSL, Guyancourt, France
来源：
GEOPHYSICAL RESEARCH LETTERS | 2018年 / 45卷 / 02期
关键词：
SOLAR-WIND; MAGNETIC-FIELD; PRECIPITATION;
D O I：
10.1002/2017GL076235
中图分类号：
P [天文学、地球科学];
学科分类号：
07 ;
摘要：
We report observations of the proton aurora at Mars, obtained with the Spectroscopy for the Investigation of the Characteristics of the Atmosphere of Mars (SPICAM) ultraviolet spectrograph on board Mars Express between 2004 and 2011. This is a third type of UV aurora that is discovered on Mars, in addition to the discrete and diffuse nightside aurora. It is observed only on the dayside as it is produced by the direct interaction of solar wind protons with the upper atmosphere. The auroral signature is an enhancement of the Lyman-alpha emission in the order of a few kilorayleighs. The proton aurora features peak emissions around 120 to 150 km. From the full SPICAM database, limb observations have been investigated and six clear cases have been found. We identify either coronal mass ejections and/or corotating interaction regions as triggers for each of these events.
引用
收藏
页码：612 / 619
页数：8
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