2015 Fiscal Year Final Research Report
Study on the structure and dynamics of the lunar exosphere
Project/Area Number |
26800258
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Research Category |
Grant-in-Aid for Young Scientists (B)
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Allocation Type | Multi-year Fund |
Research Field |
Space and upper atmospheric physics
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Research Institution | Japan Aerospace EXploration Agency |
Principal Investigator |
Yokota Shoichiro 国立研究開発法人宇宙航空研究開発機構, 宇宙科学研究所, 助教 (40435798)
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Project Period (FY) |
2014-04-01 – 2016-03-31
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Keywords | 月 / 外気圏 / 質量分析 / ピックアップイオン |
Outline of Final Research Achievements |
We have derived distributions of the lunar exosphere by using the observation data of the mass analyzer on Kaguya. We proposed a numerical model to explain a dawn-dusk asymmetry of the lunar exosphere which was discovered by Kaguya. Our model implies that the exospheric particles need to be supplied during the night for the observed dawn-dusk asymmetry. We argue that the interplanetary dust as well as grain diffusion and migration/recycling of the exospheric particles may be major suppliers. We also estimated the oxygen flux transported from the Earth to the Moon.
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Free Research Field |
宇宙プラズマ物理学
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