木星の磁場と,太陽風との相互作用

E J Smith, L Davis, D E Jones

Science (New York, N.Y.)

|January 25, 1974

まとめ

パイオニア10号のデータによると,木星の磁場は地球の磁場と対極にあり,外側の磁気圏では著しく偏移し,伸びている. これらの発見は,木星の磁気圏を形作る複雑なプラズマ相互作用を強調しています.

科学分野:

惑星科学惑星科学
マグネトヒドロダイナミクス
宇宙物理学宇宙物理学

背景:

木星には強力な磁場があり,太陽風とダイナミックに相互作用しています.
惑星の磁気圏を理解することは,宇宙探査と天体生物学にとって極めて重要です.
以前の観測は,木星の周りの複雑な磁場構造を暗示していた.

研究の目的:

磁気二極 Moment と木星の磁場の向きを特徴づけるために.
木星の磁気圏の構造と行動,太陽風との相互作用を調査する.
木星の磁気圏に影響を与えるプラズマ効果を特定するために.

主な方法:

パイオニア10号のベクトルヘリウム磁気計のデータを活用した.
磁場測定を分析し,二極パラメータと空間的変動を決定しました.
磁気圏の磁場構成と,太陽風との相互作用をモデル化した.

主要な成果:

木星の磁気二極は,地球の磁気二極と比べて逆転しており,モメントは4.0ガウスR ((J) ((3) で,傾きは15度.
二極は北に0.1R(J) と北緯170度に向かって0.2R(J) の偏移がある.
外部磁気圏の赤道に平行するフィールドラインの激しい伸びが観察され,プラズマの影響が顕著であることを示しています.

結論:

木星の磁気圏は,内部プラズマダイナミクスによって引き起こされる複雑なフィールド構成を示しています.
外側の磁気圏は,熱圧,遠心力,微分回転の証拠を示しています.
木星の磁気圏は,薄い外界と分離した弓の衝撃があり,地球のそれと似ています.

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