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Updated: Jul 12, 2026

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Scattering And Absorption of Light in Planetary Regoliths
Published on: July 1, 2019
ハッブル宇宙望遠鏡による彗星p/shoemaker-levy 9 (1993e) の観測 (1993e)
まとめ
ハッブル望遠鏡の観測により,彗星P/シューメイカー・レヴィ9は11個の原子核を持ち,それぞれ幅4.3kmまでだったことが明らかになった. これらの断片は,木星に10^8メガトンのTNTエネルギーを運ぶことができ,検出された水の生産は最小限です.
科学分野:
- 天文学と天体物理学について
- 惑星科学は惑星科学である.
- 彗星科学 彗星科学
背景:
- 彗星P/Shoemaker-Levy 9は,1993年に木星に近づく前に断片化した.
- 彗星核の性質を理解することは,衝突エネルギー推定に極めて重要です.
研究 の 目的:
- 断片化した彗星P/シューメイカー・レヴィ9号の原子核の物理的性質を特徴づける.
- 彗星が木星に衝突した際の潜在的なエネルギー堆積を推定する.
主な方法:
- ハッブル宇宙望遠鏡による観測,惑星カメラと微弱物体スペクトログラフを用いた観測.
- 核の大きさのフォトメトリック分析とOH放出のスペクトル分析.
主要な成果:
- 約20個の原子核が観測され,最も明るい原子核は11個で,大きさは23.7から24.8.8の間の大きさでした.
- 核の直径は,幾何学的なアルベドを0.04と仮定して,2.5~4.3キロメートルであった.
- 計算された潜在的な衝突エネルギーは ~4 x 10^30 ergs (~10^8 メガトンTNT) でした.
- OHの排出が検出されなかったため,水の生成速度の上限値は1秒あたり ~2 x 10^27 分子が決定されました.
結論:
- 断片化した彗星P/Shoemaker-Levy 9は,衝突時にかなりのエネルギーが放出できる実質的な原子核を持っていた.
- 検出されたOH放射の欠如は,低彗星活動と原子核から最小限の水生成を示唆しています.
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