惑星間コロナ質量放出に対する火星の反応に関するMAVEN観測
B M Jakosky1, J M Grebowsky2, J G Luhmann3
1University of Colorado, Boulder, CO, USA. bruce.jakosky@lasp.colorado.edu.
Science (New York, N.Y.)
|November 7, 2015
まとめ
火星は,大気結合とイオン損失により,大気を宇宙に失いました. 火星大気と揮発性進化 (MAVEN) ミッションは,太陽のイベント中にイオン脱出を研究し,火星の薄い大気を説明する損失率を高めました.
科学分野:
- 惑星科学
- 大気科学
- 宇宙物理学
背景:
- 火星の薄くて冷たい乾燥した大気は 大気結合と宇宙へのイオン損失に起因しています
- 火星の大気の進化を理解するには 継続的なイオン損失を理解することが重要です
研究 の 目的:
- 火星大気と揮発性進化 (MAVEN) 宇宙船からの包括的な測定を使用して,宇宙へのイオン損失を調査する.
- 火星の上層大気とイオノスフィアへの惑星間コロナ質量放出の影響を分析する.
主な方法:
- 火星大気と揮発性進化 (MAVEN) 宇宙船は,上層大気とイオノスフィアのインシットデータを収集した.
- 測定は2015年3月の惑星間コロナ質量噴出で行われた.
- 観測は,イオン脱出率を評価するためにモデリングと組み合わせられました.
主要な成果:
- 研究では,弓の衝撃と磁気殻の有意な変化が観察されました.
- 広範囲に広がったオーロラが形成され, ピックアップイオンが強化されました.
- 観測とモデルの両方とも 太陽のイベント中に宇宙へのイオン脱出率の増加を示しました
結論:
- 太陽のイベント中に宇宙へのイオン損失は,火星の大気の長期的な進化に大きく貢献している可能性があります.
- 火星の大気状態の形成に 重要な役割を果たしたのかもしれません
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