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NASAの赤外線望遠鏡施設によって観測された木星とショーマーカー・レヴィ9彗星の衝突
1Jet Propulsion Laboratory, California Institute of Technology, Pasadena 91109.
まとめ
Shoemaker-Levy 9彗星の衝突は木星の大気を大幅に温め,アンモニアのレベルを50倍以上増加させた. これらの出来事はまた,広範囲にわたる大気波乱を引き起こし,オーロラ活動の強化を引き起こした.
科学分野:
- 惑星科学は惑星科学である.
- 彗星科学 彗星科学
- 大気物理学 大気物理学
背景:
- 1994年,シューメイカー・レヴィ9彗星の木星との衝突は,ガスの巨星への衝撃効果を研究するユニークな機会を提供した.
- 以前の観測は,このような大規模な衝撃の直接的な大気への影響に関する限られたデータを提供していました.
研究 の 目的:
- 彗星シューメイカー・レヴィ9の衝突に対する木星の大気と熱の反応を分析する.
- 彗星断片の衝突後の大気組成と気温の変化を定量化するために.
主な方法:
- 国立航空宇宙局 (NASA) の赤外線望遠鏡施設を利用して観測した.
- 1994年7月12日から8月7日まで赤外線スペクトル検査と熱画像検査を行った.
- 大気組成と気温プロフィールを決定するために分析されたスペクトルデータ.
主要な成果:
- 衝突後数分間,C,G,Rの断片に強い熱赤外線放射が観測された.
- すべてのインパクトで記録された平流層温暖化と,一部のケースでは熱帯層温暖化.
- ストラトスフィアのアンモニアの豊富さの有意な増加を測定し,ベースラインの50倍を超えました.
- 衝突に関連した粒子が検出され,数ミリバーの圧力で高度に達しました.
- 衝突後約1週間後に北極の近赤外線オーロラがほぼ5倍に増加した.
結論:
- 彗星の衝突は,木星の大気中に相当で測定可能な熱的および化学的な乱れを引き起こします.
- 観測されたアンモニアの増加は,木星の平流圏内の重要な垂直輸送と化学反応を示唆しています.
- インパクトエジェクタは,大気中の高いレベルに達し,大気動力学とオーロラのような観測可能な現象に影響を与えます.
キーワード:
NASA Center ARCは,NASAセンターのARCとして運営されています.NASAの規律 エキゾバイオロジーNASAの規律番号52-20-20は,NASAの規律番号52-20で,NASAの規律番号52-20は,NASAの規律番号52-20で,NASAの規律番号52-20は,NASAの規律番号52-20で,NASAの規律番号52-20は,NASAの規律番号52-20で,NASAの規律番号52-20は,NASAの規律番号52-20で,NASAの規律番号52-20は,NASAの規律番号52-20で,NASAの規律番号52-20は,NASAの規律番号52-20で,NASAの規律番号52-20で,NASA エクゾバイオロジープログラム関連する概念動画
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