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  1. F300 宇宙地球環境研究所
  2. F300a 雑誌掲載論文
  3. 学術雑誌

Conjugate observation of auroral finger-like structures by ground-based all-sky cameras and THEMIS satellites

http://hdl.handle.net/2237/27068
http://hdl.handle.net/2237/27068
dea958fd-f32f-4bd4-9ad0-1670a8667d76
名前 / ファイル ライセンス アクション
Nishi_et_al-2017-Journal_of_Geophysical_Research-_Space_Physics.pdf Nishi_et_al-2017-Journal_of_Geophysical_Research-_Space_Physics.pdf ファイル公開日:2018/01/01 (21.6 MB)
Item type 学術雑誌論文 / Journal Article(1)
公開日 2017-11-07
タイトル
タイトル Conjugate observation of auroral finger-like structures by ground-based all-sky cameras and THEMIS satellites
言語 en
著者 Katsuki, Nishi

× Katsuki, Nishi

WEKO 73892

en Katsuki, Nishi

Search repository
Kazuo, Shiokawa

× Kazuo, Shiokawa

WEKO 73893

en Kazuo, Shiokawa

Search repository
Dennis, Frühauf

× Dennis, Frühauf

WEKO 73894

en Dennis, Frühauf

Search repository
アクセス権
アクセス権 open access
アクセス権URI http://purl.org/coar/access_right/c_abf2
権利
言語 en
権利情報 © 2017 American Geophysical Union
抄録
内容記述 In this study, we analyze the first conjugate observation of auroral finger-like structures using ground-based all-sky cameras and the Time History of Events and Macroscale Interactions during Substorms (THEMIS) satellites and investigated associated physical processes that are a cause of auroral fragmentation into patches. Two events are reported: one is a conjugate event, and the other is a nearly conjugate event. The conjugate event was observed at Narsarsuaq (magnetic latitude: 65.3°N), Greenland, at 0720–0820 UT (0506–0606 LT) on 17 February 2012. Analysis of the event revealed the following observational facts: (1) variation of parallel electron energy fluxes observed by THEMIS-E shows a correspondence to the auroral intensity variation, (2) plasma pressure and magnetic pressure fluctuate in antiphase with time scales of 5–20 min, and (3) perpendicular ion velocity is very small (less than 50 km/s). In the latter event, observed at Gakona, Alaska, on 2 February 2008, the THEMIS-D satellite passed across higher latitudes of finger-like structures. The data from THEMIS-D also showed the antiphase fluctuation between plasma pressure and magnetic pressure and the small perpendicular ion velocity. From these observations, we suggest that the finger-like structures are caused by a pressure-driven instability in the balance of plasma and magnetic pressures in the magnetosphere.
言語 en
内容記述タイプ Abstract
出版者
言語 en
出版者 American Geophysical Union
言語
言語 eng
資源タイプ
資源タイプresource http://purl.org/coar/resource_type/c_6501
タイプ journal article
出版タイプ
出版タイプ VoR
出版タイプResource http://purl.org/coar/version/c_970fb48d4fbd8a85
DOI
関連タイプ isVersionOf
識別子タイプ DOI
関連識別子 https://doi.org/10.1002/2016JA023774
ISSN
収録物識別子タイプ EISSN
収録物識別子 2169-9402
書誌情報 en : Journal of Geophysical Research-Space Physics

巻 122, 号 7, p. 7291-7306, 発行日 2017-07
著者版フラグ
値 publisher
URI
識別子 http://doi.org/10.1002/2016JA023774
識別子タイプ DOI
URI
識別子 http://hdl.handle.net/2237/27068
識別子タイプ HDL
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