2011 Fiscal Year Final Research Report
Electromagnetic environment of the moon in the solar wind and the lunar wake
| Project/Area Number |
21540461
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| Research Category |
Grant-in-Aid for Scientific Research (C)
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| Allocation Type | Single-year Grants |
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| Section | 一般 |
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| Research Field |
Space and upper atmospheric physics
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| Research Institution | Tohoku Institute of Technology |
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Principal Investigator |
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| Co-Investigator(Renkei-kenkyūsha) |
TSUNAKAWA Hideo 東京工業大学, 大学院・理工学研究科, 教授 (40163852)
SAITO Yoshifumi 宇宙航空研究開発機構, 宇宙科学研究所, 准教授 (30260011)
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| Project Period (FY) |
2009 – 2011
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| Keywords | 月 / 太陽風 / プラズマ / ウェイク / 帯電 / 月惑星電磁環境 / MHD波 / かぐや衛星 |
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| Research Abstract |
The solar wind interaction with the moon was studied using a two-dimensional electromagnetic full particle simulation and Kaguya observation. The solar wind magnetic field controls the direction of the thermal flow of the electrons and causes an asymmetry of the negative charging of the downstream-side surface. The solar wind ions are accelerated by the negative surface charging, while the solar wind electrons are expelled by the negative charging and flow away along the field line producing streaks of enhancements of the electron density. On the dayside surface, 0. 01 Hz and 0. 03-5 Hz magnetohydrodynamic waves are excited by the solar wind protons reflected by the moon through cyclotron resonance.
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