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Radial Speed Evolution of Interplanetary Coronal Mass Ejections During Solar Cycle 23
http://hdl.handle.net/2237/19929
http://hdl.handle.net/2237/199299a03aa9a-4037-47ed-8a47-ccf6e507f384
| 名前 / ファイル | ライセンス | アクション |
|---|---|---|
Iju_manuscript_solarphysics.pdf (894.1 kB)
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| Item type | 学術雑誌論文 / Journal Article(1) | |||||
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| 公開日 | 2014-05-07 | |||||
| タイトル | ||||||
| タイトル | Radial Speed Evolution of Interplanetary Coronal Mass Ejections During Solar Cycle 23 | |||||
| 言語 | en | |||||
| 著者 |
Iju, T.
× Iju, T.× Tokumaru, M.× Fujiki, K. |
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| 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 final publication is available at Springer via http://dx.doi.org/10.1007/s11207-013-0297-5 | |||||
| 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 | Initiation and propagation | |||||
| 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 | |||||
| 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 | ||||||
| 内容記述タイプ | Abstract | |||||
| 内容記述 | We report radial-speed evolution of interplanetary coronal mass ejections (ICMEs) detected by the Large Angle and Spectrometric Coronagraph onboard the Solar and Heliospheric Observatory (SOHO/LASCO), interplanetary scintillation (IPS) at 327 MHz, and in-situ observations. We analyze solar-wind disturbance factor (g-value) data derived from IPS observations during 1997 – 2009 covering nearly the whole period of Solar Cycle 23. By comparing observations from SOHO/LASCO, IPS, and in situ, we identify 39 ICMEs that could be analyzed carefully. Here, we define two speeds [V SOHO and V bg], which are the initial speed of the ICME and the speed of the background solar wind, respectively. Examinations of these speeds yield the following results: i) Fast ICMEs (with V SOHO−V bg>500 km s−1) rapidly decelerate, moderate ICMEs (with 0 km s−1≤V SOHO−V bg≤500 km s−1) show either gradually decelerating or uniform motion, and slow ICMEs (with V SOHO−V bg<0 km s−1) accelerate. The radial speeds converge on the speed of the background solar wind during their outward propagation. We subsequently find; ii) both the acceleration and the deceleration are nearly complete by 0.79±0.04 AU, and those are ended when the ICMEs reach a 480±21 km s−1. iii) For ICMEs with (V SOHO−V bg)≥0 km s−1, i.e. fast and moderate ICMEs, a linear equation a=−γ 1(V−V bg) with γ 1=6.58±0.23×10−6 s−1 is more appropriate than a quadratic equation a=−γ 2(V−V bg)|V−V bg| to describe their kinematics, where γ 1 and γ 2 are coefficients, and a and V are the acceleration and speed of ICMEs, respectively, because the χ 2 for the linear equation satisfies the statistical significance level of 0.05, while the quadratic one does not. These results support the assumption that the radial motion of ICMEs is governed by a drag force due to interaction with the background solar wind. These findings also suggest that ICMEs propagating faster than the background solar wind are controlled mainly by the hydrodynamic Stokes drag. | |||||
| 言語 | en | |||||
| 内容記述 | ||||||
| 内容記述タイプ | Other | |||||
| 内容記述 | Published online: 26 April 2013 | |||||
| 言語 | en | |||||
| 出版者 | ||||||
| 出版者 | Springer | |||||
| 言語 | en | |||||
| 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/s11207-013-0297-5 | |||||
| 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 288, 号 1, p. 331-353, 発行日 2013-11 |
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| 著者版フラグ | ||||||
| 値 | author | |||||
| URI | ||||||
| 識別子 | http://dx.doi.org/10.1007/s11207-013-0297-5 | |||||
| 識別子タイプ | DOI | |||||
| URI | ||||||
| 識別子 | http://hdl.handle.net/2237/19929 | |||||
| 識別子タイプ | HDL | |||||
