期刊
GEOPHYSICAL RESEARCH LETTERS
卷 49, 期 6, 页码 -出版社
AMER GEOPHYSICAL UNION
DOI: 10.1029/2022GL097757
关键词
aurora; Mars; auroral electrons; MAVEN
资金
- National Aeronautics and Space Administration (NASA) [NNH10CC04C]
- NASA through the Mars Exploration Program
- French space agency CNES (National Centre for Space Studies)
- NASA's Mars Data Analysis Program [80NSSC17K0455]
This study establishes empirical criteria and enables a direct statistical comparison between discrete aurorae and their source electron events, bridging the gap in previous research and facilitating collaboration among different Mars missions and comparative planetary studies of discrete aurora.
Discrete aurorae have been observed at magnetized planets such as Earth and Jupiter, triggered by accelerated electrons. Similar aurorae have also been observed at Mars with only localized strong crustal magnetisms. However, our understanding of this phenomenon at Mars is still limited. In particular, direct and quantitative comparisons of the auroral and its source electron events are lacking as these two types of observations are usually made at different times and/or locations. In this study, we establish empirical criteria to select electron events (auroral electrons) that could trigger detectable auroral emissions with Mars Atmosphere and Volatile EvolutioN measurements, thereby enabling a direct statistical comparison. We find auroral electrons share similar statistical characteristics to those previously reported for discrete auroral events. This study bridges the gap between electron observations and auroral detections and enables collaborations across different Mars missions, as well as comparative planetary studies of discrete aurora.
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