小惑星433エロスの元素組成:NEAR-シューメーカーX線スペクトロメーターの結果
1Goddard Space Flight Center, Code 691, Greenbelt, MD 20771, USA. Space Sciences Building, Cornell University, Ithaca, NY 14853, USA. Max-Planck-Institut fur Chemie, Postfach 3060, D-55020 Mainz, Germany. Department of Planetary Science, Spac.
Science (New York, N.Y.)
|September 23, 2000
まとめ
小惑星433エロス (Eros) の分析は,原始的なコンドリート組成を示しています. 低アルミニウムは世界的な差異がないことを示しますが,硫黄の減少は衝撃または融解のイベントを示す可能性があります.
科学分野:
- 惑星科学は惑星科学である.
- 小惑星の組成分析
- 地質化学 地質化学
背景:
- 小惑星433エロス (Eros) は,地球に近い小惑星である.
- 小惑星の組成を理解することは,初期の太陽系プロセスについての洞察を提供します.
研究 の 目的:
- 小惑星433 Eros.の主要な元素の構成比率を決定する.
- エロスの構成が,その形成と進化に及ぼす影響を調査する.
主な方法:
- 画像データから主要な元素の組成比の分析.
- 元素比 (Mg/Si,Al/Si,Ca/Si,Fe/Si) をコンドリートモデルと比較した.
主要な成果:
- 分析されたすべての地域では,アルミニウムの豊富性が低いことが示され,これは世界の差異化に矛盾しています.
- 元素の比率は,エロスの原始的でコンドリティックな組成を強く示唆しています.
- 通常のコンドライトと比較して,硫黄の有意な減少,およびアルミニウムとカルシウムの潜在的な減少が観察されました.
結論:
- 433エロスの組成は,原始的でコンドリティックであるとして最もよく説明されます.
- 観測された枯渇は,限られた部分的な融解または衝突による揮発性を示す可能性があります.
- エロスの構成は,太陽系の初期状態と小惑星の処理に関する手がかりを提供します.
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