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Double Arc Instability in the Solar Corona
http://hdl.handle.net/2237/26983
http://hdl.handle.net/2237/269836b7a72e8-9536-4cb3-82f9-b41d2d13b8eb
名前 / ファイル | ライセンス | アクション |
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Item type | 学術雑誌論文 / Journal Article(1) | |||||
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公開日 | 2017-10-04 | |||||
タイトル | ||||||
タイトル | Double Arc Instability in the Solar Corona | |||||
言語 | en | |||||
著者 |
Ishiguro, N.
× Ishiguro, N.× Kusano, 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 | © 2017 The American Astronomical Society | |||||
キーワード | ||||||
主題Scheme | Other | |||||
主題 | instabilities | |||||
キーワード | ||||||
主題Scheme | Other | |||||
主題 | Sun: corona | |||||
キーワード | ||||||
主題Scheme | Other | |||||
主題 | Sun: coronal mass ejections (CMEs) | |||||
キーワード | ||||||
主題Scheme | Other | |||||
主題 | Sun: filaments, prominences | |||||
キーワード | ||||||
主題Scheme | Other | |||||
主題 | Sun: flares | |||||
抄録 | ||||||
内容記述 | The stability of the magnetic field in the solar corona is important for understanding the causes of solar eruptions.<br/>Although various scenarios have been suggested to date, the tether-cutting reconnection scenario proposed by<br/>Moore et al. is one of the widely accepted models to explain the onset process of solar eruptions. Although the<br/>tether-cutting reconnection scenario proposes that the sigmoidal field formed by internal reconnection is the<br/>magnetic field in the pre-eruptive state, the stability of the sigmoidal field has not yet been investigated<br/>quantitatively. In this paper, in order to elucidate the stability problem of the pre-eruptive state, we developed a<br/>simple numerical analysis in which the sigmoidal field is modeled by a double arc electric current loop and its<br/>stability is analyzed. As a result, we found that the double arc loop is more easily destabilized than the<br/>axisymmetric torus, and it becomes unstable even if the external field does not decay with altitude, which is in<br/>contrast to the axisymmetric torus instability. This suggests that tether-cutting reconnection may well work as the<br/>onset mechanism of solar eruptions, and if so, the critical condition for eruption under a certain geometry may be<br/>determined by a new type of instability rather than by the torus instability. Based on them, we propose a new type<br/>of instability called double arc instability (DAI). We discuss the critical conditions for DAI and derive a new<br/>parameter κ, defined as the product of the magnetic twist and the normalized flux of the tether-cutting<br/>reconnection. | |||||
言語 | en | |||||
内容記述タイプ | Abstract | |||||
出版者 | ||||||
言語 | en | |||||
出版者 | IOP publishing | |||||
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/10.3847/1538-4357/aa799b | |||||
ISSN | ||||||
収録物識別子タイプ | PISSN | |||||
収録物識別子 | 0004-637X | |||||
書誌情報 |
en : The Astrophysical Journal 巻 843, 号 2, p. 101-101, 発行日 2017-07-10 |
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著者版フラグ | ||||||
値 | publisher | |||||
URI | ||||||
識別子 | http://doi.org/10.3847/1538-4357/aa799b | |||||
識別子タイプ | DOI | |||||
URI | ||||||
識別子 | http://hdl.handle.net/2237/26983 | |||||
識別子タイプ | HDL |