散らばった氷の物体の円盤と木星ファミリーの彗星の起源
1Department of Physics, Queen's University, Kingston, Ontario K7L 3N6, Canada. duncan@astro.queensu.ca
Science (New York, N.Y.)
|June 13, 1997
まとめ
シミュレーションでは,太陽系の初期動力学によって形成された,海王星を超えた物体の散らばった円盤を明らかにしています. この円盤は木星系彗星の源であり,1996 RQ20のような新たに発見された物体も含まれている可能性がある.
科学分野:
- 惑星科学は惑星科学である.
- コンピューティング天体物理学
- 太陽系ダイナミクス 太陽系ダイナミクス
背景:
- カイパーベルトは,海王星の向こうにある氷の塊の領域です.
- 初期の太陽系は,重要なダイナミックな進化を経験しました.
- 木星系彗星の起源は,依然として研究の対象となっている.
研究 の 目的:
- ネプチューンの向こうにある物体の散らばった円盤の形成を調査する.
- この円盤が木星系彗星の源であるかどうかを判断するために.
- この新しく形成されたディスクの潜在的なメンバーを特定するために.
主な方法:
- 長期軌道統合 (4億年) が実施されました.
- シミュレーションは,粒子と海王星の相互作用をモデル化した.
- シミュレートされたオブジェクトの軌道要素を分析し,観測されたオブジェクトと比較しました.
主要な成果:
- 軌道の統合により,海王星の向こうに散らばった天体の円盤が生成された.
- これらのオブジェクトは,カイパーベルトオブジェクトよりも大きな偏心と傾きを示します.
- シミュレートされた粒子の約1%が,太陽系の年齢のためにこの円盤に存続しています.
- 6 x 10 ^ 8 のオブジェクトのディスクは,観測された木星ファミリーの彗星を供給することができます.
- 1996年RQ20と1996年TL66のオブジェクトは,予測された円盤メンバーとの軌道類似性を示しています.
結論:
- シミュレートされた散らばった円盤は,初期の太陽系進化の妥当な結果である.
- この円盤は,木星系彗星の有望な源である.
- 1996年RQ20と1996年TL66は,この散らばった円盤の最初の識別されたメンバーです.
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