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Updated: Jun 30, 2026

11:34
Scattering And Absorption of Light in Planetary Regoliths
Published on: July 1, 2019
短周期彗星81P/ワイルド2のホンドルルのような物体
Tomoki Nakamura1, Takaaki Noguchi, Akira Tsuchiyama
1Department of Earth and Planetary Science, Faculty of Science, Kyushu University, Hakozaki, Fukuoka 812-8581, Japan. tomoki@geo.kyushu-u.ac.jp
まとめ
スターダストミッションのサンプルは,高温フラッシュメルトによって形成された彗星81P/ワイルド2からの結晶粒子を明らかにしています. これらのコンドルールのような物体は,初期の太陽系物質が広く分布していたことを示唆しています.
科学分野:
- 宇宙化学 (コスモケミストリー)
- 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
背景:
- スターダストミッションは,彗星81P/ワイルド2からサンプルを回収した.
- これらのサンプルには,起源不明の結晶物質が含まれています.
- コンドリートにおける支配的な粒子であるコンドルールは,太陽の内部の星雲の中で形成されると考えられています.
研究 の 目的:
- 彗星サンプルにおける結晶物質の起源と性質を調査する.
- 彗星粒子をコンドルールなどの既知の太陽系物質と比較するために.
- 初期の太陽系物質の分布と形成過程を理解する.
主な方法:
- 彗星81P/ワイルド2からの4つの結晶粒子の分析.
- 質感,鉱物学,および組成分析.
- 酸素同位体分析. 酸素同位体の分析. 酸素同位体の分析.
主要な成果:
- 4つの結晶粒子は,コンドルールに似た特徴を示している.
- これらの粒子は,高温フラッシュメルトによって形成された.
- 酸素同位体組成は炭酸性コンドライトのコンドルールと一致する.
結論:
- 彗星の粒子は,隕石に含まれるコンドルールと似ている.
- 高温プロセスは,太陽系外部の星雲で発生した.
- コンドルル状の物体は,太陽系の内側から外側へと運ばれ,初期の太陽系物質が広く分布していたことを示している.
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