カイパーベルトオブジェクトのサイズとアルベド (20000) Varuna Varuna
1Institute for Astronomy, 2680 Woodlawn Drive, Honolulu, Hawaii 96822, USA. jewitt@ifa.hawaii.edu
Nature
|May 25, 2001
まとめ
研究者は,カイパーベルトオブジェクト (KBO) ヴァルナのサイズとアルベドを測定しました. この研究は,ヴァルナを明らかにしています.
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.
- 太陽系の研究は,太陽系の研究である.
背景:
- 多くのカイパーベルトオブジェクト (KBO) は,海王星を超えて太陽の周りを回っています.
- KBOsは初期の太陽系からの残骸であり,彗星の潜在的な源である.
- 彼らの大きな距離は,KBOの物理的特性を研究することを困難にします.
研究 の 目的:
- KBO (20000) Varuna.のサイズとアルベドを正確に決定するために.
- 推定アルベド値に基づく以前のKBOサイズ推定の限界を克服するために.
主な方法:
- ヴァルナの熱放出と光学光の反射を同時に測定した.
- 結合光測定を用いたサイズとアルベドの独立した決定.
主要な成果:
- ヴァルナには,900+129-145 kmの等価円径があります.
- ヴァルナの赤い幾何学的なアルベドは0.070+0.030-0.017.0です.
- ヴァルナの表面は冥王星よりも暗いが,KBOがこれまで想定していたよりも明るい.
結論:
- この研究は,著名なKBOの正確な身体的特徴を提供します.
- ヴァルナの表面の性質は,比較的新鮮な氷が不足していることを示唆しています.
- この研究は,KBOの組成と進化に関する私たちの理解を洗練します.
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