太陽の冠状孔におけるX線ジェットの原動力として,小規模なフィラメント噴出が,太陽の冠状孔におけるX線ジェットの原動力である
Alphonse C Sterling1, Ronald L Moore2, David A Falconer2
1NASA/Marshall Space Flight Center, Huntsville, Alabama 35812, USA.
Nature
|July 7, 2015
まとめ
ソーラーX線ジェットは,ミニチュアフィラメント噴火によって駆動され,確立された新興流動モデルに挑戦しています. これは,ジェットから巨大な冠状質量噴出まで,あらゆるスケールの太陽噴火の基礎にある普遍的な磁気プロセスを示唆しています.
科学分野:
- ソーラー物理学 ソーラー物理学
- プラズマ天体物理学とは
- マグネトヒドロダイナミクス
背景:
- 太陽系X線ジェットは,伝統的に磁気再接続を含む新興流動モデルによって説明されています.
- このモデルは,新興の閉じた磁場と周囲の開かれた磁場との再接続によるジェットベースでのX線明るさを予測しています.
研究 の 目的:
- 太陽系X線ジェットの形成メカニズムを調査するために.
- 高解像度観測を用いて,新興流動モデルの妥当性を検証する.
- ジェット形成における磁気再接続の役割を理解する.
主な方法:
- 高解像度のX線と極紫外線観測を分析した.
- 冠状孔で形成されるランダムに選択された20のX線ジェットが研究されました.
- 観測データを新興フルーツモデルの予測と比較した.
主要な成果:
- 新興フローモデルとは対照的に,研究されたすべてのジェットで再接続を推進するミニチュアフィラメント噴出が観察されました.
- X線照明は,太陽のフレアのような,噴出するミニフィラメントの"脚"の再接続によるものです.
- モデルに疑問を投げかける以前の発見は,シングルジェット研究に基づいていた.
結論:
- 太陽のX線ジェットは,ミニフィラメントの噴出によって駆動され,新興フルーツモデルによってのみ駆動されるわけではありません.
- 磁気噴火は,太陽の大気圏の広範囲のスケールで動作する基本的なプロセスです.
- この統一された見解は,小さなジェットから大規模な太陽フレアや冠状質量噴射に至る現象を潜在的に説明します.
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