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最も近い知られた茶色矮星の世界的な雲の地図
I J M Crossfield1, B Biller2, J E Schlieder1
1Max Planck Institut für Astronomie, Königstuhl 17, 69117 Heidelberg, Germany.
Nature
|January 31, 2014
まとめ
茶色矮星は,最初の2D地表地図によって明らかにされた,不規則な雲を示しています. これらの星下天体は,約1日の時間スケールで気象パターンの進化を示しています.
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.
背景:
- 茶色矮星は,惑星よりも質量が大きい星下天体ですが,水素融合を維持するための質量が不足しています.
- 彼らは熱く生まれ,時間とともに冷たくなり,大気中の塵が凝縮され,特定の温度値で散らばります.
- 以前の観測は統合測定に限定され,詳細な表面特性の分析を妨げていた.
研究 の 目的:
- 茶色矮星の最初の二次元表面地図を作成するために.
- 雲のような大規模な表面の特徴を特定し,特徴づけること.
- 茶色矮星の大気気天候パターンのダイナミクスを調査するために.
主な方法:
- 先進的な観測技術を活用して,茶色矮星の二次元表面マップを作成しました.
- 地図を分析して,雲の覆いを示す明暗な領域を特定しました.
- 天気パターンの進化を決定するために,時間とともに地表の特徴の変化を監視します.
主要な成果:
- 2Dマップを作成し,ブラウン・ナワーの表面の明るいと暗い特徴を大規模に明らかにしました.
- 観測された特徴は,不完全な雲の覆いと一致しています.
- 世界的な気象パターンの進化の特徴的な時間スケールは,約1日であると決定されました.
結論:
- 茶色矮星の大気は,均一な雲の甲板ではなく,不規則な雲によって特徴付けられています.
- 最初の2D地表マップは,ブラウン・ダワーフの大気動態に関する前例のない洞察を提供します.
- 茶色矮星の天気パターンは,1日の間,急速に進化する.
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