JAXA Repository / AIREX 未来へ続く、宙(そら)への英知
49480000.pdf1.99 MB
Other TitleMercury's exosphere explored by BepiColombo mission
Author(jpn)彦坂 健太郎; 亀田 真吾; 野澤 宏大; 吉岡 和夫; 山崎 敦; 吉川 一朗; 笠羽 康正
Author(eng)Hikosaka, Kentaro; Kameda, Shingo; Nozawa, Hiromasa; Yoshioka, Kazuo; Yamazaki, Atsushi; Yoshikawa, Ichiro; Kasaba, Yasumasa
Author Affiliation(jpn)宇宙航空研究開発機構; 宇宙航空研究開発機構; 宇宙航空研究開発機構; 宇宙航空研究開発機構; 宇宙航空研究開発機構; 宇宙航空研究開発機構; 宇宙航空研究開発機構
Author Affiliation(eng)Japan Aerospace Exploration Agency; Japan Aerospace Exploration Agency; Japan Aerospace Exploration Agency; Japan Aerospace Exploration Agency; Japan Aerospace Exploration Agency; Japan Aerospace Exploration Agency; Japan Aerospace Exploration Agency
Issue Date2006-03-10
PublisherJapan Aerospace Exploration Agency (JAXA)
Publication date2006-03-10
AbstractMercury's Sodium Atmosphere Spectral Imager (MSASI) on BepiColombo is under development. MSASI is a high-dispersion visible spectrometer working in the spectral range around sodium D2 emission using a Fabry-Perot interferometer (FPI). Discoveries of Na, K and Ca from the ground-based observations clearly arise that the regolith of Mercury releases a fraction of its content to the atmosphere. Some processes are proposed up to now as release mechanisms, e.g. (1) Photon-stimulated desorption, (2) Ion sputtering, and (3) Micro-meteoroid impact/vaporization. Here we use 3D Monte Carlo simulation in these cases to describe the images taken by MSASI. We can see specific spatial distributions of the Mercury atmosphere in each process. Therefore we conclude that MSASI can identify the mechanism of the Mercury atmosphere comparing with our simulation result.
DescriptionJAXA Research and Development Report
KeywordsMercury; planetary atmosphere; sodium vapor; space exploration; high dispersion spectrograph; resonance scattering; solar radiation; solar wind; photon stimulated desorption; Fabry-Perot interferometer; 水星; 惑星大気; ナトリウム蒸気; 宇宙探査; 高分散分光器; 共鳴散乱; 太陽放射; 太陽風; 太陽光脱離; Fabry-Perot干渉計
Document TypeTechnical Report
JAXA Category研究開発報告
Report NoJAXA-RR-05-021

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