Item type |
itemtype_ver1(1) |
公開日 |
2021-11-12 |
タイトル |
|
|
タイトル |
Multi‐Wavelength Imaging Observations of STEVE at Athabasca, Canada |
|
言語 |
en |
著者 |
Yadav, Sneha
Shiokawa, Kazuo
Otsuka, Yuichi
Connors, Martin
St Maurice, J.‐P.
|
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 |
© 2021 American Geophysical Union |
内容記述 |
|
|
内容記述 |
We present the first multi-wavelength imaging observations of strong thermal emission velocity enhancement (STEVE) using an all-sky imager at Athabasca (magnetic latitude = 61.5°N), Canada. This study is based on three STEVE events which were accompanied by picket fence structures in the green-line. Although the STEVE arc was dominant in 630 and 557.7-nm, weak emissions were also found in other wavelengths including OI at 844.6, Hβ, Na, and the nominal background filter at 572.5-nm. As observed at 630 and 557.7-nm, the STEVE arc started as a faint arc close to the auroral oval and moved equatorward. The 557.7-nm arc exhibited picket fence structure at later times after it moved equatorward. The picket fence was sometimes found to persist even after the 630-nm arc had disappeared. During a particular event, the STEVE arcs in both the 630 and 557.7-nm were found to carry a ribbon-like motion moving along the arc. We have found that STEVE arcs are embedded in a region of weak diffuse auroral emissions. The STEVE arcs have sharp boundaries and these boundaries are different in red- and green-line. The sharp decrease in the intensity at the immediate poleward edge of the STEVE arc appears as a “dark-band” in the green-line images. Based on the horizontal component of the geomagnetic field at Fort Smith (magnetic latitude 67.28°N), we find that the STEVE arc detachment, its equatorward motion, and its brightness coincided with changes in the magnetic activity during the recovery phase of a substorm. |
|
言語 |
en |
|
内容記述タイプ |
Abstract |
出版者 |
|
|
言語 |
en |
|
出版者 |
Wiley |
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 |
関連情報 |
|
|
関連タイプ |
isVersionOf |
|
|
識別子タイプ |
DOI |
|
|
関連識別子 |
https://doi.org/10.1029/2020JA028622 |
収録物識別子 |
|
|
収録物識別子タイプ |
PISSN |
|
収録物識別子 |
2169-9380 |
書誌情報 |
en : Journal of Geophysical Research: Space Physics
巻 126,
号 2,
p. 2020JA028622,
発行日 2021-02
|
ファイル公開日 |
|
|
日付 |
2021-11-12 |
|
日付タイプ |
Available |