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Updated: Jul 22, 2026

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Bringing the Visible Universe into Focus with Robo-AO
Published on: February 12, 2013
巨大な惑星の大気への酸素の外部供給
H Feuchtgruber1, E Lellouch, T de Graauw
1Max-Planck Institut für Extraterrestrische Physik, Garching, Germany.
Nature
|September 20, 1997
まとめ
巨大惑星の大気は,氷のリング,月,塵から酸素を得ている. 赤外線スペクトロスコーピーは,土星,天王星,海王星でガス状の水 (H2O) を検出し,大気化学とエネルギーバランスに影響を与えました.
科学分野:
- 惑星科学 惑星科学
- 大気化学 大気化学
- スペクトロスコーピーは,スペクトロスコーピーを用います.
背景:
- 巨大惑星の大気は,主に環境 (H2,He,CH4) を減少させています.
- 氷の輪,衛星,惑星間塵は酸素の潜在的な源である.
- 大気圏への輸送は,水氷やシリケート塵として発生します.
研究 の 目的:
- 巨大惑星の上層大気圏でガス状の水 (H2O) を検出する.
- H2O柱の密度を定量化する.
- 外部酸素源の役割を調査する.
主な方法:
- 検出には赤外線スペクトロスコーピーを用いた.
- 分析は上層大気組成に焦点を当てた.
主要な成果:
- ガス状のH2Oが土星,天王星,海王星で検出されました.
- H2O柱の密度:1.5×10^15 (土星),9×10^13 (天王星),3×10^14 (海王星) 分子cm^-2.2である.
- 二酸化炭素 (CO2) は,土星と海王星でも検出されました.
結論:
- 観測結果は,H2O (10^5-10^7分子cm^-2 s^-1) の外部フロースを支持しています.
- 降下する水と塵は,大気中の光化学,エネルギー予算,そしてイオノスフィアに影響を与えます.
- 発見は,遠い氷の太陽系オブジェクトの活動を制限するのに役立ちます.
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