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Updated: Jul 11, 2026

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Scattering And Absorption of Light in Planetary Regoliths
Published on: July 1, 2019
フォボスの組成:光スペクトル解析による炭酸性コンドライト表面の証拠
まとめ
フォボス (Phobos) とは
科学分野:
- 惑星科学は惑星科学である.
- スペクトル顕微鏡検査です.
- 地質化学 地質化学
背景:
- 火星の内面の月であるフォボスは,ユニークなスペクトルサインを持っています.
- フォボスの構成を理解することは,火星系の起源を理解するための鍵です.
研究 の 目的:
- フォボスの反射スペクトルをまとめ,分析する.
- 光スペクトルの類似性に基づいて,フォボスの表面構成を推論する.
主な方法:
- マリナー9号,バイキング着陸機,地上からの光度データ (200-1100 nm) から集めた反射スペクトル.
- フォボスのスペクトルと小惑星セレスとパラスのスペクトルを比較した.
- 分析されたスペクトルシグネチャは,炭酸性コンドリート組成を示す.
主要な成果:
- フォボスの反射スペクトルは400nm以下に急激に低下しています.
- フォボスのスペクトルアルベドは,小惑星セレスのスペクトルアルベドとほぼ一致しています.
- このスペクトル的な類似性は,フォボスの炭酸性コンドリート表面の組成を示唆しています.
結論:
- フォボスの表面の組成は,炭酸塩状のコンドライトに似ている可能性が高い.
- この発見は,低密度とともに,フォボスの起源が火星とは異なることを示唆しています.
- 火星とその月フォボスの形成経路を明らかにしている.
関連する概念動画
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