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Scattering And Absorption of Light in Planetary Regoliths
Published on: July 1, 2019
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わずかな粒子は土星のフィービー環を,驚くほど大きな距離まで支配しています
Douglas P Hamilton1, Michael F Skrutskie2, Anne J Verbiscer2
1Department of Astronomy, University of Maryland, College Park, Maryland 20742-2421, USA.
Nature
|June 12, 2015
まとめ
土星の最も外側のフェイベ環は,以前に知られていたよりもはるかに遠く,土星の半径100から270まで広がっています. 分析により,粒子の大きさの分布が急激で,より大きな粒子が,この薄弱で古代の環系を支配していることが示唆されています.
科学分野:
- 惑星科学は惑星科学である.
- 天文学 (astronomy) 天文学 (astronomy) とは,天文学 (astronomy) とは,天文学 (astronomy) とは,天文学 (astronomy) とは
- リングシステム リングシステム
背景:
- 土星の最も外側のリングは2009年に発見され,月フェイブから発生しています.
- リングの完全な半径範囲と粒子の大きさは,以前は未定でした.
- これは土星のE環よりもかなり大きい.
研究 の 目的:
- 土星のフェイブ環の完全な放射範囲を決定する.
- リング内の粒子の大きさの分布を制限するために.
- リングの形成と進化を理解するために.
主な方法:
- リング全体をマッピングするための赤外線画像.
- フィービーから放出された環粒子の軌道動力のモデリング.
- 粒子の大きさの分布のための理論的な力法則プロファイルの構築.
主要な成果:
- フィーベ環は土星の半径100から270まで広がっている.
- 鋭い粒子の大きさの分布プロファイルは,観測データに最も適しています.
- 穀物の高温が観測された傾斜に寄与している可能性が高い.
結論:
- 土星のフェイビー環は,粒子の大きさの分布が急な巨大な構造です.
- より大きな粒子 (半径>10cm) は,リングの横断面積に大きく貢献します.
- これらのより大きな粒子は,安定した軌道を持ち,長期的な持続性を示しています.
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