土星のイオノスフェア の 現地 測定 に よる と,それ は 動 的 で,リング と 相互作用 し て いる
J-E Wahlund1, M W Morooka2, L Z Hadid2
1Swedish Institute of Space Physics, Box 537, SE-751 21 Uppsala, Sweden. jan-erik.wahlund@irfu.se.
Science (New York, N.Y.)
|December 13, 2017
まとめ
土星
科学分野:
- 惑星科学
- 大気化学
- プラズマ物理学
背景:
- 土星のイオノスフィアは 大気化学と電流の閉鎖に 重要な役割を果たしています
- イオノスフィアとリングの相互作用を理解することは 土星のシステムのダイナミクスの鍵です
研究 の 目的:
- 土星のイオノスフィアの特性を調べるため
- イオン圏と土星のリングの相互作用を分析する
主な方法:
- カッシーニ宇宙船のラジオとプラズマ波科学装置による現地測定.
- リング通過中のプラズマ密度と電子温度データを分析する.
主要な成果:
- 寒くて密集した ダイナミックなイオノスフィアが 土星のリングと相互作用しています
- 観測されたプラズマ密度は1000cm−3までで,電子温度は1160K以下である.
- リングシャドーによる北南非対称性を特定した.
結論:
- 土星のイオノスフィアは リングによって大きく影響を受ける ダイナミックな環境です
- リングシェーダリングは 大気中のイオン化不対称性を引き起こし,イオン圏に影響を与えます
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