旅行者1号が木星と遭遇した際の極紫外線観測

A L Broadfoot, M J Belton, P Z Takacs

Science (New York, N.Y.)

|June 1, 1979

まとめ

ボイジャー1号は,熱いイオプラズマ・トーラスと水素が豊富にある熱い熱球を含む,木星のシステムにおける新しい物理的プロセスを検出しました. ガニメデにはおそらくエクソスフィアがある.

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
天体物理学天体物理学

背景:

木星系は,複雑なプラズマと大気相互作用を示しています.
これらの相互作用を理解することは,惑星の進化の鍵です.

研究の目的:

探査機ボイジャー1が遭遇した木星の光学的な極紫外線スペクトルを分析するために.
木星系内のこれまで検出されなかった物理的プロセスを特定するために.

主な方法:

Ioプラズマのトーラスのスペクトル分析.
木星の極地におけるオーロラ放射の観測.
太陽と星の隠蔽実験. 太陽と星の隠蔽実験.

主要な成果:

特定された明るい放射線 (S III,S IV,O III) は,Ioプラズマトーラスにおける高い電子温度 (10^5 K) を示しています.
木星の極域で,イオトーラスと関連した強いオーロラによる水素排出が観測されました.
木星の大気中に大量に原子水素がある熱熱層 (>= 1000 K) を推論した.
決定ガニメデの大気は最多はエクソスフィアである.

結論:

ヴォイジャー1号の観測により,木星のシステムでこれまで検出されなかった重要な物理的過程が明らかになった.
イオプラズマ・トーラスと木星の熱球は極端な条件を示しています.
ガニメデには薄い大気があり,おそらくエクソスフィアである.

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