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極水素から推論された月の真の極流動
M A Siegler1,2, R S Miller3, J T Keane4
1Planetary Science Institute, Tucson, Arizona 85719, USA.
Nature
|March 25, 2016
まとめ
月 の 極地 に ある 水素 の 堆積物 が 月 を 明らかに し て いる
科学分野:
- 月の地質学と地球物理学
- 惑星科学
- 天体生物学
背景:
- 月の初期動力学と熱学の歴史は 十分に理解されていない.
- 北極の水素堆積物,おそらく水氷, 永久に影の領域を示しています.
- 観測された水素分布は 現在の月の温度に基づくモデルと矛盾しています
研究 の 目的:
- 月面の極性水素の分布を調査する
- 月の回転軸が 時間の経過とともに 変化したかどうかを判断するためです
- 月の地質学的進化と 極地における水素異常を 結びつけるためだ
主な方法:
- 中性子スペクトロメーターによってマッピングされた極性水素堆積物の分布の分析.
- 月の慣性瞬間と回転軸の方向転換のモデル化
- 熱異常が 真の極地移動の 原因だと推測する
主要な成果:
- 月面の極の水素堆積は,現在の熱モデルと矛盾する反極分布を示している.
- この分布は,月のスピン軸の重要なシフト (真の極流動) を示している.
- Procellarum領域の下の 低密度の熱異常が 原因とされている
結論:
- 観測された水素の分布を説明しています.
- 初期のメア火山活動に関連したプロセララムの熱異常は,月の密度と方向性を変化させた.
- 極地水素は古代の水分流出を記録し 月の地質学と地質学的進化の洞察を与えてくれます
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