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タイトル: | Interaction between terrestrial plasma sheet electrons and the lunar surface: SELENE (Kaguya) observations |
著者: | Harada, Yuki https://orcid.org/0000-0002-4001-6352 (unconfirmed) Machida, Shinobu Saito, Yoshifumi Yokota, Shoichiro Asamura, Kazushi Nishino, Masaki N. Tanaka, Takaaki https://orcid.org/0000-0002-4383-0368 (unconfirmed) Tsunakawa, Hideo Shibuya, Hidetoshi Takahashi, Futoshi Matsushima, Masaki Shimizu, Hisayoshi |
著者名の別形: | 原田, 裕己 |
キーワード: | Moon Kaguya plasma |
発行日: | Oct-2010 |
出版者: | American Geophysical Union |
誌名: | Geophysical Research Letters |
巻: | 37 |
号: | 19 |
論文番号: | L19202 |
抄録: | Analysis of the data obtained by SELENE (Kaguya) revealed a partial loss in the electron velocity distribution function due to the "gyro-loss effect", namely gyrating electrons being absorbed by the lunar surface. The Moon enters the Earth's magnetosphere for a few days around full moon, where plasma conditions are significantly different from those in the solar wind. When the magnetic field is locally parallel to the lunar surface, relatively high-energy electrons in the terrestrial plasma sheet with Larmor radii greater than SELENE's orbital height strike the lunar surface and are absorbed before they can be detected. This phenomenon can be observed as an empty region in the electron distribution function, which is initially isotropic in the plasma sheet, resulting in a non-gyrotropic distribution. We observed the expected characteristic electron distributions, as well as an empty region that was consistent with the presence of a relatively strong electric field (∼10 mV/m) around the Moon when it is in the plasma sheet. |
著作権等: | ©2010. American Geophysical Union. This is not the published version. Please cite only the published version. この論文は出版社版でありません。引用の際には出版社版をご確認ご利用ください。 |
URI: | http://hdl.handle.net/2433/131758 |
DOI(出版社版): | 10.1029/2010GL044574 |
出現コレクション: | 学術雑誌掲載論文等 |
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