Lunar electromagnetic environment revealed by SELENE (Kaguya)
| Project/Area Number |
26400477
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| Research Category |
Grant-in-Aid for Scientific Research (C)
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| Allocation Type | Multi-year Fund |
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| Section | 一般 |
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| Research Field |
Space and upper atmospheric physics
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| Research Institution | Nagoya University |
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Principal Investigator |
NISHINO MASAKI 名古屋大学, 工学研究科, 特任講師 (50466794)
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| Research Collaborator |
SAITO Yoshifumi 宇宙航空研究開発機構, 宇宙科学研究所, 教授 (30260011)
HARADA Yuki 京都大学, 大学院理学研究科, 助教 (90823386)
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| Project Period (FY) |
2014-04-01 – 2019-03-31
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| Project Status |
Completed (Fiscal Year 2018)
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| Budget Amount *help |
¥4,940,000 (Direct Cost: ¥3,800,000、Indirect Cost: ¥1,140,000)
Fiscal Year 2017: ¥1,170,000 (Direct Cost: ¥900,000、Indirect Cost: ¥270,000)
Fiscal Year 2016: ¥1,300,000 (Direct Cost: ¥1,000,000、Indirect Cost: ¥300,000)
Fiscal Year 2015: ¥1,300,000 (Direct Cost: ¥1,000,000、Indirect Cost: ¥300,000)
Fiscal Year 2014: ¥1,170,000 (Direct Cost: ¥900,000、Indirect Cost: ¥270,000)
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| Keywords | 月面環境学 / 月プラズマ / SELENE / 太陽風 / 太陽風・月相互作用 / 波動粒子相互作用 / 月プラズマ環境 / 惑星間空間磁場 / 月ウェイク / 反磁性効果 / ウェイク / 帯電 / 静電孤立波 / 衝撃波粒子加速 / 磁気異常 |
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| Outline of Final Research Achievements |
We studied unsolved physical mechanism of interactions between the solar wind and the Moon, using observational data by the lunar orbiter Kaguya (SELENE). Main results are (1) signature of strong magnetic anomaly in the lunar wake, (2) variations of the lunar surface potential in the terrestrial foreshock, (3) discovery of the decrease in the interplanetary magnetic field intensity around the Moon, and (4) identification of excitation mechanism of electrostatic solitary waves around the Moon. In addition, we proposed a new model of the lunar wake boundary, based on the observations. These results would become the basis of the lunar environmental studies in both aspects of science and engineering, and can be widely applicable to other rocky (exo)planets and small bodies.
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| Academic Significance and Societal Importance of the Research Achievements |
本研究は月周回衛星Kaguya(SELENE)の観測データを用いて月面の電磁環境を推定したものであり、理工の両面において将来の月面探査の基礎データとなるものである。また、月と太陽風の相互作用のうち未解明であった現象の物理メカニズムを明らかにすることが出来たが、これは月以外の天体(水星や小天体等)にも広く応用することが可能である。
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Report
(6 results)
Research Products
(29 results)
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[Presentation] Possible mechanisms of an ESW excitation2017
Author(s)
M.N. Nishino, Y. Kasahara, Y. Harada, Y. Saito, H. Tsunakawa, K. Hashimoto, F. Takahashi, S. Yokota, M. Matsushima, H. Shibuya, Y. Shimizu
Organizer
地球電磁気・地球惑星圏学会 第142回講演会
Related Report
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[Presentation] Kaguya observations of the lunar wake in the terrestrial foreshock2015
Author(s)
M.N.Nishino, Y.Saito, H.Tsunakawa, M.Fujimoto, Y.Harada, Y.Tsugawa, F.Takahashi, S.Yokota, M.Matsushima, H.Shibuya, H.Shimizu
Organizer
AGU Fall Meeting 2015
Place of Presentation
米国サンフランシスコ市
Year and Date
2015-12-15
Related Report
Int'l Joint Research
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[Presentation] Kaguya observations of the lunar plasma environment in the terrestrial foreshock2015
Author(s)
Masaki N. NISHINO, Yoshifumi Saito, Hideo Tsunakawa, Yasunori, Tsugawa, Yuki Harada, Futoshi Takahashi, Masaki Fujimoto, Shoichiro Yokota, Masaki Matsushima, Hidetoshi Shibuya, Hisayoshi Shimizu
Organizer
第138回地球電磁気・地球惑星圏学会 総会および講演会
Place of Presentation
東京都文京区、東京大学
Year and Date
2015-11-03
Related Report
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[Presentation] Plasma and wave observations in the deep lunar wake2014
Author(s)
Masaki N. Nishino, Yoshifumi Saito, Yoshiya Kasahara, Yoshiharu Omura, Kozo Hashimoto, Takayuki Ono, Hideo Tsunakawa, Futoshi Takahashi, Shoichiro Yokota, Masaki Fujimoto
Organizer
URSI GASS 2014
Place of Presentation
中華人民共和国、北京市
Year and Date
2014-08-22
Related Report
Invited
