まとめ
ガス状の水 (H2O) がハレー彗星で検出されました.
科学分野:
- 彗星科学は彗星科学である.
- アストロケミストリー アストロケミストリー
- 惑星科学は惑星科学である.
背景:
- 彗星は,初期の太陽系についての洞察を提供できる氷の体です.
- 水は彗星の重要な成分であり,彗星の組成と進化を理解するために不可欠です.
研究 の 目的:
- ハレー彗星の昏睡状態にあるガスの水 (H2O) を検出し,定量化するために.
- 彗星水のスペクトル特性を分析し,その起源と物理的条件を推論する.
主な方法:
- NASA-Kuiper空中天文台のフーリエ変換スペクトロメーターを使用しました.
- H2Oのv(3) 帯の9つのスペクトル線を2.65マイクロメートルで観測した.
- 回転集団と興奮条件を決定するために,スペクトル線の強度を分析した.
主要な成果:
- 1985年12月22日,1日,24,1日にハレー彗星の昏睡状態で検出された気体,中性H2O.
- 測定された水の生成速度は,約6×10^28分子/秒と1.7×10^29分子/秒であった.
- オーソ・パラ比2.66±0.13を決定し,核スピン温度32K (+5K,-2K) に対応した.
結論:
- 観測されたスペクトルデータは,非熱平衡彗星モデルと一致しています.
- 派生した低核スピン温度は,水蒸気が低温の氷から発生したことを示唆しています.
- 彗星の組成と初期の太陽系の条件を理解するための重要なデータを提供します.
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