コメタリー科学 COSAC質量スペクトロメトリーによって発見された彗星67P/チュリュモフ・ゲラシメンコの有機化合物
Fred Goesmann1, Helmut Rosenbauer2, Jan Hendrik Bredehöft3
1Max Planck Institute for Solar System Research, Justus von Liebig Weg 3, 37077 Göttingen, Germany. goesmann@mps.mpg.de.
まとめ
彗星サンプルと組成 (COSAC) は,彗星67P/チュリュモフ・ゲラシメンコで16の有機化合物を検出した. メチルイソシアネートを含む4つの新しい化合物が特定され,彗星物質の洞察を提供しました.
科学分野:
- 宇宙化学
- 天体生物学
- 惑星科学
背景:
- 彗星は原始的な太陽系物質で 氷,塵,シリケート,有機化合物を含んでいます
- これらの材料は生命の起源と 太陽系の初期進化のヒントを 持っています
- 彗星67P/Churyumov-Gerasimenkoは,その構成を研究するためにロゼッタミッションによって探査されました.
研究 の 目的:
- 彗星67P/チュリュモフ・ゲラシメンコに存在する有機分子を in situ測定を用いて分析する.
- 彗星の揮発性物質と耐火材料の化学組成を特定し,特徴づけること.
- 彗星の有機化合物の 潜在的な星間遺産を調査する
主な方法:
- 彗星サンプルと組成 (COSAC) 実験を用いた彗星物質のインサイト分析.
- 嗅覚モードで収集された進化したガスの質量分析.
- 質量スペクトルに基づいて有機化合物の識別
主要な成果:
- COSACの質量スペクトロメーターは,彗星67P/チュリュモフ・ゲラシメンコに16の有機化合物を検出しました.
- 複数の窒素含有有機種が特定された.
- メチルイソシアネート,アセトン,プロピオナルデヒド,アセタミドの4つの化合物は 彗星で初めて検出されました
結論:
- 彗星67P/Churyumov-Gerasimenkoの有機物リストには,いくつかの窒素を含有する種と新しい化合物が含まれています.
- これらの有機分子の存在は 彗星が初期の地球に プリバイオティック物質を運ぶ役割を 支持しています
- 彗星の組成をさらに分析することで 太陽系の形成と進化の理解を深めることができます
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