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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Project Status |
Completed (Fiscal Year 2015)
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Budget Amount *help |
¥1,430,000 (Direct Cost: ¥1,100,000、Indirect Cost: ¥330,000)
Fiscal Year 2015: ¥780,000 (Direct Cost: ¥600,000、Indirect Cost: ¥180,000)
Fiscal Year 2014: ¥650,000 (Direct Cost: ¥500,000、Indirect Cost: ¥150,000)
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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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Report
(3 results)
Research Products
(8 results)
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[Journal Article] Backscattered energetic neutral atoms from the Moon in the Earth's plasma sheet observed by Chandarayaan-1/Sub-keV Atom Reflecting Analyzer instrument2014
Author(s)
Harada, Yuki; Futaana, Yoshifumi; Barabash, Stas; Wieser, Martin; Wurz, Peter; Bhardwaj, Anil; Asamura, Kazushi; Saito, Yoshifumi; Yokota, Shoichiro; Tsunakawa, Hideo; Machida, Shinobu
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Journal Title
JOURNAL OF GEOPHYSICAL RESEARCH-SPACE PHYSICS
Volume: 119
Issue: 5
Pages: 3573-3584
DOI
NAID
Related Report
Peer Reviewed
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[Journal Article] Structure of the ionized lunar sodium and potassium exosphere: Dawn-dusk asymmetry2014
Author(s)
Yokota, Shoichiro; Tanaka, Takaaki; Saito, Yoshifumi; Asamura, Kazushi; Nishino, Masaki N.; Fujimoto, Masaki; Tsunakawa, Hideo; Shibuya, Hidetoshi; Matsushima, Masaki; Shimizu, Hisayoshi; Takahashi, Futoshi
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Journal Title
JOURNAL OF GEOPHYSICAL RESEARCH-PLANETS
Volume: 119
Issue: 4
Pages: 798-809
DOI
Related Report
Peer Reviewed
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