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Pulmonary Embolism III: Nursing Management
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シャロンの半径と大気の制約は,恒星の隠蔽観測から得られたものです
A A S Gulbis1, J L Elliot, M J Person
1Department of Earth, Atmospheric, and Planetary Sciences, Massachusetts Institute of Technology, Cambridge, Massachusetts 02139-4307, USA. gulbis@mit.edu
Nature
|January 7, 2006
まとめ
新しい観測により,冥王星の月であるハロンの半径は606km,密度は1.72gcm−3であることが明らかになった. これらの発見は,太陽系外部の進化とハロンの形成についての洞察を提供します.
科学分野:
- 惑星科学は惑星科学である.
- 太陽系外部の進化について
- 冥王星 - シャロン システムダイナミクス
背景:
- 冥王星とハロンの物理的特徴は,太陽系外部の進化を理解するために重要である.
- これまでのハロンの半径と密度の推定は,限られたデータで不確実であった.
- 恒星の隠蔽観測は,いくつかの制約を与えましたが,精細化が必要でした.
研究 の 目的:
- チャロンの半径と密度を正確に決定するために.
- チャロンの有意な大気の存在または欠如を調査する.
- 冥王星-ハロン星系の形成と進化のモデルを洗練する.
主な方法:
- シャロンによる恒星隠蔽の複数のステーション観測.
- 隠蔽光の曲線を分析して,幾何学的および物理的なパラメータを導き出す.
- 派生パラメータに基づいて散発密度および岩質分数の計算.
主要な成果:
- チャロンの平均半径は606 +/- 8kmと決定されました.
- ハロンの散発密度は1.72 +/- 0.15 g cm ((-3) として計算されています.
- 岩質分子は0.63 +/- 0.05と推定され,有意な大気は検出されなかった.
結論:
- この結果は,冥王星-ハロン星系における衝突形成モデルを支持している.
- システム内の前身オブジェクトは,差異化を経験した可能性があります.
- 太陽系外部の大きな天体によって大気の保持の可能性は,まだ開かれている.
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