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Phase Transitions and Effect of Intermolecular Forces
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土星のリングと内部の衛星の起源は,失われたタイタンサイズの衛星から質量を取り除くことによるものです
1Planetary Science Directorate, Southwest Research Institute, 1050 Walnut Street, Suite 300, Boulder, Colorado 80302, USA. robin@boulder.swri.edu
Nature
|December 15, 2010
まとめ
土星の氷のリングは,惑星の近くで潮的に破壊された大きな,異なる月から形成された可能性が高い. このプロセスは,好ましく氷を剥がし,純粋な氷のリングを残し,より小さな氷の月を生成しました.
科学分野:
- 惑星科学は惑星科学である.
- 太陽系形成 太陽系形成について
- 天体物理学 天体物理学
背景:
- 土星の主に水氷のリングの起源は未だに解明されていない.
- 月や彗星の破壊を伴う以前の理論は,リングの組成を説明できませんでした.
- 土星の衛星システムは,失われた大きな衛星の歴史を示唆しています.
研究 の 目的:
- 土星の環の形成に関する新しいモデルを調査する.
- 土星の環の観測された純粋な水氷の組成を説明するために.
- 土星の内部の氷の月の形成を説明するために.
主な方法:
- 異なるタイタンサイズの衛星が土星に向かって内側へ移動する数値シミュレーション.
- 惑星の潮力が衛星の構造に及ぼす影響をモデル化.
- 破壊された物質の質量損失とその後の進化を分析する.
主要な成果:
- 潮の力は,シミュレートされた衛星の外側の氷の層を好ましく剥がした.
- 純粋な氷のリングが形成され,現在のリングよりもかなり重い.
- シミュレーションでは,リングの縁から氷の月が次々に産生することを示しています.
結論:
- 大きく分化している月の潮による破壊は,土星の純粋な氷のリングを形成する有効なメカニズムです.
- このモデルは,リングの組成と土星の内部の氷の月の起源をうまく説明しています.
- このプロセスは,氷を優先的に除去し,岩石のコアが惑星に衝撃を与えるようにします.
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