マウンダー最小値以降の太陽の大規模磁場の進化
S K Solanki1, M Schüssler, M Fligge
1Max-Planck-Institut für Aeronomie, Katlenburg-Lindau, Germany. solanki@linmpi.mpg.de
Nature
|December 2, 2000
まとめ
太陽の磁場は11年周期で長期にわたる変化を示しています. 新しいモデルは,惑星間磁場強度の最近の倍増を説明し,それを太陽斑のサイクル変動と関連付けています.
科学分野:
- 太陽物理 太陽物理学
- ヘリオフィジックス ヘリオフィジックス
- 天体物理学 天体物理学
背景:
- 太陽の磁場は周期的な行動を示し,特に11年間の太陽光斑の周期を示しています.
- マウンダー最小値のような世俗的な変動や歴史的な出来事は,長期の磁場変化を示しています.
- 惑星間磁場強度は,過去"世紀で意外と倍増した.
研究 の 目的:
- 太陽の惑星間磁場強度が最近倍増した原因を調査する.
- 太陽の大規模磁場の長期的な進化を説明するモデルを開発する.
- 太陽斑の周期長と世俗的な磁場変動の関係を探求する.
主な方法:
- 太陽の大規模磁場進化のための計算モデルの開発.
- 何世紀にもわたって長期にわたる磁場変化のシミュレーション.
- 太陽サイクルパラメータと惑星間磁場強度の間の相関を特定するために,モデルの出力の分析.
主要な成果:
- 提案されたモデルは,過去100年間に観測された惑星間磁場強度の倍増を成功裏に再現しています.
- このモデルは,太陽の斑点周期の持続時間と,磁場の古くからの変動との間の直接的な関係を示しています.
- この研究は,惑星間磁場強度の最近の増加に対する潜在的な説明を提供する.
結論:
- 太陽の磁場の長期的進化は,固有の太陽の周期と密接に関連しています.
- 太陽の磁場における長期の変化は,観測された惑星間磁場強度の増加を説明できる.
- この研究は,太陽の磁場動態とそのヘリオスフィアへの影響を理解するための新しい枠組みを提供します.
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