南部高速流:ウリュッセ号のSWICS装置による結果
J Geiss1, G Gloeckler, R von Steiger
1Physikalisches Institut, University of Bern, Switzerland.
まとめ
南部の冠状孔からの高速太陽風は安定し,閉じ込められていた. 電子の温度は150万ケルビンに達し,極風を加速するために追加のモメンタムが必要であることを示唆しました.
科学分野:
- 太陽物理 太陽物理学
- プラズマ物理学のプラズマ物理学
- ヘリオフィジックス ヘリオフィジックス
背景:
- 太陽風は,コロナと呼ばれる太陽の上層大気から放出される電荷粒子の流れです.
- 冠状孔は,太陽の大気圏の領域で,磁場線が開き,太陽風が逃れることを可能にします.
研究 の 目的:
- 南部の冠状孔から発生する高速太陽風の特徴を分析するために.
- 冠状孔内の電子温度と元素組成を決定するために.
- 北極風の加速メカニズムを調査するために.
主な方法:
- 南部の冠状孔からの高速太陽風データの分析.
- 電子の温度を推論するために,電荷状態の測定を用いる.
- プラズマの組成を理解するために重元素の豊富さを調べる.
主要な成果:
- 太陽風の流れは,驚くほど均一で安定しており,冠と染色球まで広がり,鋭く制限されていました.
- 冠状の穴内の電子の温度は,太陽の3半径以内の約150万ケルビンに達しました.
- 重元素の有意な枯渇は観察されなかった.
結論:
- 観測された太陽風とプラズマ組成の性質は,標準加速モデルが不十分かもしれないことを示唆しています.
- 北極風の加速を説明するために,追加のモメンタムの源が必要である可能性が高い.
- 極地太陽風のダイナミクスと加速過程を完全に理解するためには,さらなる研究が必要である.
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