まとめ
太陽の周期の変化は,太陽の地下回転の小さな変化を引き起こします. これらの角速度の変化は,主に高緯度では,太陽活動と関連しています.
科学分野:
- * 太陽物理学 太陽物理学
- *ヘリオ地震学について
- * ソーラーダイナモ
背景:
- *太陽のpモード周波数分割は,太陽の内部構造と動力学についての洞察を提供します.
- * 過去のヘリオ地震観測は,太陽の内部の太陽周期に関連する変動を示していた.
研究 の 目的:
- *太陽の地下表面の角速度の変化を太陽周期でヘリオ地震データを用いて調査する.
- * 太陽の回転速度の変動の緯度依存を決定する.
- * 観測された角速度の変化と太陽活動との潜在的な関連性を探求する.
主な方法:
- * ビッグベア太陽観測所 (1986年と1988-90年) の太陽pモード周波数分割データの分析.
- * アシンプトティック・インバーション・テクニックをヘリオ・シズミック・データに適用.
- * 太陽の異なる緯度と時間帯における自転速度の比較.
主要な成果:
- * 小さい (約. 1%) で,太陽周期と相関する地下角速度の変化が検出されました.
- * 最大の角速度変動 (約. 4 nHz) が1986年から1988-90年の間に,太陽の高緯度 (約. 60度) となる.
- *ヘリオ地震学により,緯度に依存する回転速度の変化が明らかになった.
結論:
- *太陽の地下回転率は,太陽の周期によって変化し,特に高緯度では変化します.
- *観測された角速度の変化の大きさは,太陽のコンベクションゾーンにおける太陽周期の影響に関する以前の示唆と一致しています.
- *これらの太陽周期によって引き起こされる角速度の変化を説明する詳細なモデルはまだ必要である.
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