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Updated: May 4, 2026

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In Situ Soil Moisture Sensors in Undisturbed Soils
Published on: November 18, 2022
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ヨーロッパの南極で一時的な水蒸気
Lorenz Roth1, Joachim Saur, Kurt D Retherford
1Southwest Research Institute, San Antonio, TX, USA.
まとめ
ハッブル望遠鏡の観測により,2012年12月,ヨーロッパに水蒸気雲が検出されました. 軌道相に関連したこの活動は,潮のストレスによって影響される異なる羽根の振る舞いを示唆しています.
科学分野:
- 惑星科学は惑星科学である.
- 天体生物学 アストロバイオロジー
- 宇宙探査 宇宙探査
背景:
- 木星の衛星であるヨーロッパは,地表の下の海があるため,地球外生命の探求の主要なターゲットです.
- 以前の観測では水蒸気雲の出現が示唆されていたが,明確な証拠は得られなかった.
研究 の 目的:
- 紫外線放射を用いて,水蒸気プラーム活動に関する欧州の可能性を調査する.
- 検出された羽根の特徴と変動性を決定する.
主な方法:
- ハッブル宇宙望遠鏡 (HST) を利用して,2012年11月と12月にヨーロッパの紫外線放射を画像化しました.
- 水素ライマン-αと酸素OIの130.4ナノメートルの排出量を分析し,梅の活動を示す兆候を探した.
主要な成果:
- 2012年12月にヨーロッパ南半球上空で,統計的に有意な水素と酸素の過剰排出量が検出されました.
- これらの排出は7時間持続し,200kmの高さの2つの水蒸気噴出と一致しました.
- 2012年11月と1999年以前のHST画像では,梅の活動が検出されませんでした.
結論:
- ユーロパは変動する水蒸気雲の活動を示しており,これは軌道位置と潮のストレスと関連している可能性がある.
- この発見は,アポセンター付近の羽根の存在と,ペリセンター付近の欠席を予測するモデルを裏付けている.
- この研究は,ヨーロッパのダイナミックな環境と潜在的居住可能性に関する私たちの理解を深めます.
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