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エプシロン・オーリゲー系におけるトランジットディスクの赤外線画像
Brian Kloppenborg1, Robert Stencel, John D Monnier
1Department of Physics and Astronomy, University of Denver, 2112 East Wesley Avenue, Denver, Colorado 80208, USA. bkloppen@du.edu
Nature
|April 9, 2010
まとめ
エプシロン・オーリゲは二重星系を覆っている.
科学分野:
- 天文学と天体物理学について
- 恒星の進化について
- バイナリー・スター・システム バイナリー・スター・システム
背景:
- エプシロン・オーリゲ (Epsilon Aurigae) は,謎めいた,検出不能な伴星を伴った,長期間の二重星系である.
- 以前の理論では,同伴者はブラックホールや赤外線恒星のような巨大な物体であると示唆されていました.
- 最近の仮説では,遮蔽円盤を持つ低質量F型星が提案されている.
研究 の 目的:
- エプシロン・オーリゲの仲間であるエプシロン・オーリゲの性質をめぐる190年の論争を解決するために.
- エクリプスするオブジェクトの直接的な観測証拠を提供するために.
- 目に見えるF型星の質量を測定する.
主な方法:
- インターフェロメトリック画像を用いて,日食する天体の直接的な視覚データを取得します.
- 軌道要素と質量-明るさ比を分析する.
- 観測データを既存の理論モデルと比較する.
主要な成果:
- 直接的な画像撮影は,日食する天体が不透明で傾いた円盤であることを確認しました.
- 目に見える星は低質量F型星 (3.6 +/- 0.7太陽質量) である.
- 伴星はB5V型で,質量は太陽質量5.9倍である.
結論:
- 蝕の対象は,ダイナミック的に無意味な塵の円盤であり,巨大な伴侶ではありません.
- この研究は,エプシロン・オーリゲの日食の長年の謎を解明した.
- バイナリーシステムの正確な恒星質量が決定されました.
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