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アイテム
Field- Aligned Low-Energy O+ Flux Enhancements in the Inner Magnetosphere Observed by Arase
http://hdl.handle.net/10228/00009046
http://hdl.handle.net/10228/000090461eefa87f-2756-49f2-be0a-478d86c3f821
| 名前 / ファイル | ライセンス | アクション |
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LaSEINE-2021_018.pdf (15.0 MB)
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| アイテムタイプ | 学術雑誌論文 = Journal Article(1) | |||||||||||
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| 公開日 | 2023-01-06 | |||||||||||
| 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 | Field- Aligned Low-Energy O+ Flux Enhancements in the Inner Magnetosphere Observed by Arase | |||||||||||
| 言語 | en | |||||||||||
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| 言語 | eng | |||||||||||
| 著者 |
Nosé, M.
× Nosé, M.× Matsuoka, A.× Miyoshi, Y.× Asamura, K.× Hori, T.× 寺本, 万里子
WEKO
26395
× Shinohara, I.× Hirahara, M. |
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| 抄録 | ||||||||||||
| 内容記述タイプ | Abstract | |||||||||||
| 内容記述 | The present study examines the low-energy ion flux variations observed by the Arase satellite in the inner magnetosphere. From the magnetic field and ion flux data obtained by the fluxgate magnetometer and the low-energy particle experiments–ion mass analyzer onboard Arase, we find 55 events of the low-energy O+ flux enhancement accompanied with magnetic field dipolarization in the periods of April 1–October 31, 2017 and July 1, 2018–January 31, 2019. The low-energy O+ flux enhancements (a) start a few minutes after the dipolarization onset, (b) have energy-dispersed signatures with decreasing energy from a few keV down to ∼10 eV, (c) are observed in both storm and non-storm periods, (d) have a field-aligned distribution (α ∼ 0° in the southern hemisphere and α ∼ 180° in the northern hemisphere), (e) are accompanied by the low-energy H+ flux enhancements that have lower energies than O+ by a factor of 3–10, and (f) increase the O+ density and the O+/H+ density ratio by ∼10 times and 4–5 times, respectively. We perform a numerical simulation to trace ion trajectories forward in time from the Arase positions. It is revealed that both H+ and O+ ions drift eastward and reach the dawn-to-morning sector without being lost in the ionosphere, if the pitch angle scattering effect is considered near the equatorial plane. This result suggests that these low-energy field-aligned ions can contribute to formation of the warm plasma cloak. | |||||||||||
| 言語 | en | |||||||||||
| 書誌情報 |
en : Journal of Geophysical Research: Space Physics 巻 126, 号 8, p. e2021JA029168-1-e2021JA029168-20, 発行日 2021-07-16 |
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| 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/10.1029/2021JA029168 | |||||||||||
| 日本十進分類法 | ||||||||||||
| 主題Scheme | NDC | |||||||||||
| 主題 | 440 | |||||||||||
| 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. M. Nosé, A. Matsuoka, Y. Miyoshi, K. Asamura, T. Hori, M. Teramoto, I. Shinohara, M. Hirahara, (2021), Field-Aligned Low-Energy O+ Flux Enhancements in the Inner Magnetosphere Observed by Arase, Journal of Geophysical Research: Space Physics, Volume126, Issue8, e2021JA029168, 10.1029/2021JA029168. To view the published open abstract, go to https://doi.org/10.1029/2021JA029168. | |||||||||||
| 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 | 10847 | |||||||||||
