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高エネルギー中性子探知器,Mars Odysseyからの地下水素の地図
I Mitrofanov1, D Anfimov, A Kozyrev
1Institute for Space Research, Moscow 117997, Russia.
まとめ
マース・オデッセイ マース・オデッセイ
科学分野:
- 惑星科学は惑星科学である.
- アストロジオロジー アストロジオロジー
- 地質物理学 地質物理学とは地質物理学です.
背景:
- 火星の地下水素の存在と分布は,過去と現在の水の主要な指標です.
- 以前のミッションでは,水氷の証拠が示されましたが,地下水素濃度の詳細なマッピングは進行中です.
研究 の 目的:
- ニュートロン検出データを用いて火星の地下水素の分布をマッピングする.
- 水素に富んだ材料の存在と潜在的な形態を推論する.
主な方法:
- 火星オデッセイ宇宙船に搭載された高エネルギー中性子検出器 (HEND) のデータを活用した.
- マッピングの55日間の中性子数赤字を分析した.
- ニュートロン赤字と地下層の組成の関係を解釈するためにモデリングを使用した.
主要な成果:
- 火星の南の高地と北の低地で高エネルギー中性子の有意な欠乏が確認されました.
- これらの中性子欠乏を,濃縮された地下水素の証拠として解釈した.
- モデル化された結果は,潜在的な説明として,数十センチメートルの厚さの水氷に富んだ層の存在を示唆しています.
結論:
- 地下水素は,火星全体に不均等に分布しており,特定の地域では顕著な濃度があります.
- データは,かなりの地下水氷の存在を強く支持しています.
- これらの氷に富んだ層の厚みと分布に関するさらなる調査が必要である.
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