ヘイル・ボップ彗星における一酸化炭素の観測
D Jewitt1, M Senay, H Matthews
1Institute for Astronomy, Honolulu, HI 96822, USA.
Science (New York, N.Y.)
|February 23, 1996
まとめ
ヘール・ボップ彗星は,太陽から遠く離れている時でさえも,一酸化炭素 (CO) によって駆動される初期の塵コマ活動を示しています. これは,COが1997年の近日期前の彗星の初期行動の鍵であることを示唆しています.
科学分野:
- 天文学と天体物理学について
- 彗星科学 彗星科学
背景:
- ヘイル・ボップ彗星 (C/1995 01) は,太陽から異常な距離 (6 AU) にある顕著な塵のコマを示しています.
- この彗星は1997年4月,近日点 (0.92AU) に近づいており,目に見える物体となる見通しです.
研究 の 目的:
- ヘール・ボップ彗星の初期の彗星活動の原因を調査する.
- 観測された塵コマの原因となる揮発性種を特定するために.
主な方法:
- ミリメートル波観測を用いて彗星の組成を調べた.
- 分子種を検出するために,光譜分析が行われました.
主要な成果:
- 一酸化炭素 (CO) は,彗星の昏睡の重要な成分として特定されました.
- COの存在は,観測された初期の塵の活動と相関しています.
結論:
- 一酸化炭素 (CO) は,ヘイル・ボップ彗星の初期の活動の主な原動力として特定されています.
- この発見は,彗星の放出ガスを支配するメカニズムを,大太陽中心距離で洞察する.
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