太陽の"丘"によって明らかにされたように,太陽のロスビー波は,太陽の"丘"によって明らかにされています
1Institute for Astronomy, University of Hawaii, Honolulu 96822, USA. jkuhn@solar.stanford.edn
Nature
|June 13, 2000
まとめ
科学者は100mの高さ100mを検出しました.
科学分野:
- 太陽物理 太陽物理学
- ヘリオシズモロジー (ヘリオシズモロジー) とは
- 流体力学 流体力学
背景:
- 太陽は微分回転を示し,極地よりも赤道速度が速い.
- この現象を説明するために,陸上の海洋波と同様のロスビーモード (rモード) 振動が提案されています.
- 太陽のrモードの振動は,理論的には微分回転によって制約されます.
研究 の 目的:
- 太陽の微分回転におけるrモード振動の潜在的役割を調査する.
- 太陽のrモード振動の観測可能な表面現象を特定するために.
主な方法:
- フォトスフィアの表面特性の分析.
- 太陽の表面上の"丘"の高さと距離を測定する.
主要な成果:
- 100mの高さの光球"丘"が検出されました.
- 太陽の表面上のこれらの特徴の均一な距離は,およそ (8.7 +/- 0.6) x 10^4 km.
- これらの観測は,太陽のrモード振動に関する理論的予測と一致しています.
結論:
- 観測された波紋状光球は,太陽のrモード振動の表面シグネチャーである可能性が高い.
- Rモードの振動は,光球の下のコンベクションを組織し,微分回転を誘導する可能性があります.
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