木星近くのプラズマ観測:ボイジャー2からの最初の結果

H S Bridge, J W Belcher, A J Lazarus

Science (New York, N.Y.)

|November 23, 1979

まとめ

旅行者2号は,ボイジャー2号である.

科学分野:

惑星科学は惑星科学である.
宇宙物理学宇宙物理学
プラズマ物理学プラズマ物理学

背景:

ボイジャー2号のインバウンドパスは,木星の磁気圏に関する重要なデータを提供した.
以前,ボイジャー1号による観測により,ベースラインのプラズマ特性が確認された.

研究の目的:

ボイジャー2号の磁気圏の横断とプラズマ観測を詳細に説明する.
木星の磁気圏内のプラズマの行動,構成,構造を分析する.

主な方法:

プラズマ密度,強度,および構成のVoyager 2によるインシトゥ測定.
プラズマシート幾何学を推論するために惑星のスピン調節の分析.

主要な成果:

複数の弓の衝撃交差点と,特定の木星の半径で磁気圏の入り口があります.
プラズマはコロテーションを示し,密度と強度はボイジャー1と比較できる.
重イオンが支配する磁気圏のプラズマ (質量密度比 ~100:1).
ガニメデの近くで観測されたプラズマ強度の低下は,複雑な相互作用を示唆しています.
プラズマシートは最初は二極赤道を中心とし,距離とともに回転赤道に偏移する.
プラズマシートの縦向きの位置は,回転する二極電極に遅れていました.

結論:

ヴォイジャー2号のデータは,木星の磁気圏に関する以前の発見を確認し,拡張しています.
磁気圏の構造と動態は,重イオンとガンニメデのような衛星との相互作用の影響を受けています.
プラズマシートの複雑な幾何学と振る舞いは,木星の磁気圏の過程についての洞察を提供します.

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