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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

Kinematic Properties of Slow ICMEs and an Interpretation of a Modified Drag Equation for Fast and Moderate ICMEs

http://hdl.handle.net/2237/21224
http://hdl.handle.net/2237/21224
5b94ef11-c2f6-4127-a7b2-45a6c6be21fe
名前 / ファイル ライセンス アクション
Iju_slowicme_manuscript.pdf Iju_slowicme_manuscript.pdf (269.3 kB)
Item type 学術雑誌論文 / Journal Article(1)
公開日 2015-02-20
タイトル
タイトル Kinematic Properties of Slow ICMEs and an Interpretation of a Modified Drag Equation for Fast and Moderate ICMEs
言語 en
著者 Iju, T.

× Iju, T.

WEKO 55907

en Iju, T.

Search repository
Tokumaru, M.

× Tokumaru, M.

WEKO 55908

en Tokumaru, M.

Search repository
Fujiki, K.

× Fujiki, K.

WEKO 55909

en Fujiki, K.

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 The original publication is available at www.springerlink.com.
キーワード
主題Scheme Other
主題 Coronal mass ejections
キーワード
主題Scheme Other
主題 Interplanetary coronal mass ejections
キーワード
主題Scheme Other
主題 Plasma physics
キーワード
主題Scheme Other
主題 Radio scintillation
抄録
内容記述 We report kinematic properties of slow interplanetary coronal mass ejections (ICMEs) identified by SOHO/LASCO, interplanetary scintillation, and in situ observations and propose a modified equation for the ICME motion. We identified seven ICMEs between 2010 and 2011 and compared them with 39 events reported in our previous work. We examined 15 fast (V SOHO−V bg>500 km s−1), 25 moderate (0 km s−1≤V SOHO−V bg≤500 km s−1), and 6 slow (V SOHO−V bg<0 km s−1) ICMEs, where V SOHO and V bg are the initial speed of ICMEs and the speed of the background solar wind. For slow ICMEs, we found the following results: i) They accelerate toward the speed of the background solar wind during their propagation and reach their final speed by 0.34±0.03 AU. ii) The acceleration ends when they reach 479±126 km s−1; this is close to the typical speed of the solar wind during the period of this study. iii) When γ 1 and γ 2 are assumed to be constants, a quadratic equation for the acceleration a=−γ 2(V−V bg)|V−V bg| is more appropriate than a linear one a=−γ 1(V−V bg), where V is the propagation speed of ICMEs, while the latter gives a smaller χ 2 value than the former. For the motion of the fast and moderate ICMEs, we found a modified drag equation a=−2.07×10−12(V−V bg)|V−V bg|−4.84×10−6(V−V bg). From the viewpoint of fluid dynamics, we interpret this equation as indicating that ICMEs with 0 km s−1≤V−V bg≤2300 km s−1 are controlled mainly by the hydrodynamic Stokes drag force, while the aerodynamic drag force is a predominant factor for the propagation of ICME with V−V bg>2300 km s−1.
言語 en
内容記述タイプ Abstract
内容記述
内容記述 Epub 2014 Jan 23.
言語 en
内容記述タイプ Other
出版者
言語 en
出版者 Springer
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 AM
出版タイプResource http://purl.org/coar/version/c_ab4af688f83e57aa
DOI
関連タイプ isVersionOf
識別子タイプ DOI
関連識別子 https://doi.org/10.1007/s11207-014-0472-3
ISSN
収録物識別子タイプ PISSN
収録物識別子 0038-0938
書誌情報 en : Solar Physics

巻 289, 号 6, p. 2157-2175, 発行日 2014-06
著者版フラグ
値 author
URI
識別子 http://dx.doi.org/10.1007/s11207-014-0472-3
識別子タイプ DOI
URI
識別子 http://hdl.handle.net/2237/21224
識別子タイプ HDL
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