WEKO3
アイテム
A Statistical Study of the Solar Wind Dependence of Multi-Harmonic Toroidal ULF Waves Observed by the Arase Satellite
http://hdl.handle.net/10228/00009053
http://hdl.handle.net/10228/00009053dfcf0223-de70-44a8-b434-bd20a6709f79
| 名前 / ファイル | ライセンス | アクション |
|---|---|---|
LaSEINE-2021_033.pdf (5.3 MB)
|
|
| アイテムタイプ | 学術雑誌論文 = Journal Article(1) | |||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 公開日 | 2023-01-11 | |||||||||||
| 資源タイプ | ||||||||||||
| 資源タイプ識別子 | http://purl.org/coar/resource_type/c_6501 | |||||||||||
| 資源タイプ | journal article | |||||||||||
| タイトル | ||||||||||||
| タイトル | A Statistical Study of the Solar Wind Dependence of Multi-Harmonic Toroidal ULF Waves Observed by the Arase Satellite | |||||||||||
| 言語 | en | |||||||||||
| 言語 | ||||||||||||
| 言語 | eng | |||||||||||
| 著者 |
Yamamoto, K.
× Yamamoto, K.× Seki, K.× Matsuoka, A.× Imajo, S.× 寺本, 万里子
WEKO
26395
× Kitahara, M.× Kasahara, Y.× Kumamoto, A.× Tsuchiya, F.× Shoji, M.× Nakamura, S.× Miyoshi, Y.× Shinohara, I. |
|||||||||||
| 抄録 | ||||||||||||
| 内容記述タイプ | Abstract | |||||||||||
| 内容記述 | Toroidal standing Alfvén wave is one of the ultra-low frequency waves that are frequently observed in the terrestrial magnetosphere. They sometimes exhibit multi-harmonic frequency spectra, indicating wide energy range input in the magnetosphere. However, their energy source has not been fully understood due to the lack of statistical studies. Here we used the data of the Arase satellite observations for ∼3.5 years and conducted a statistical analysis of the solar wind dependence of the occurrence rate, wave power, and frequency of the multi-harmonic toroidal waves. We automatically detected the multi-harmonic waves and categorized them into four groups according to the solar wind velocity and the cone angle of the interplanetary magnetic field. We found that the occurrence rate and wave power of the multi-harmonic waves increase with the solar wind velocity on the flank sides. In the noon sector, the occurrence rate of the multi-harmonic waves increases with the decrease of the cone angle. The median frequency of the multi-harmonic waves on the dayside is positively correlated with the upstream wave frequency predicted by the theory of the ion beam instability for a small cone angle. The occurrence rate also increases with the solar wind dynamic pressure fluctuations. Therefore, we suggest that the Kelvin-Helmholtz instability, the upstream waves, and the dynamic pressure fluctuations are possible sources of the multi-harmonic waves. This study sheds light on the activity of the multi-harmonic waves which can affect radiation belt electrons under various solar wind conditions. | |||||||||||
| 言語 | en | |||||||||||
| 書誌情報 |
en : Journal of Geophysical Research: Space Physics 巻 127, 号 1, p. e2021JA029840-1-e2021JA029840-17, 発行日 2021-12-28 |
|||||||||||
| 出版社 | ||||||||||||
| 出版者 | American Geophysical Union | |||||||||||
| DOI | ||||||||||||
| 関連タイプ | isIdenticalTo | |||||||||||
| 識別子タイプ | DOI | |||||||||||
| 関連識別子 | https://doi.org/10.1029/2021JA029840 | |||||||||||
| ISSN | ||||||||||||
| 収録物識別子タイプ | EISSN | |||||||||||
| 収録物識別子 | 2169-9402 | |||||||||||
| 著作権関連情報 | ||||||||||||
| 権利情報 | An edited version of this paper was published by AGU. Copyright 2021 American Geophysical Union. K. Yamamoto, K. Seki, A. Matsuoka, S. Imajo, M. Teramoto, M. Kitahara, Y. Kasahara, A. Kumamoto, F. Tsuchiya, M. Shoji, S. Nakamura, Y. Miyoshi, I. Shinohara, (2021), A Statistical Study of the Solar Wind Dependence of Multi-Harmonic Toroidal ULF Waves Observed by the Arase Satellite, Journal of Geophysical Research: Space Physics, Volume127, Issue1, e2021JA029840, 10.1029/2021JA029840. To view the published open abstract, go to https://doi.org/10.1029/2021JA029840. | |||||||||||
| 出版タイプ | ||||||||||||
| 出版タイプ | VoR | |||||||||||
| 出版タイプResource | http://purl.org/coar/version/c_970fb48d4fbd8a85 | |||||||||||
| 査読の有無 | ||||||||||||
| 値 | yes | |||||||||||
| 連携ID | ||||||||||||
| 値 | 10862 | |||||||||||
