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HD 181068: 赤い巨星が,三重に覆われるコンパクトな階層的な三重システムの中にいる
A Derekas1, L L Kiss, T Borkovits
1Department of Astronomy, Eötvös University, Budapest, Hungary. derekas@konkoly.hu
Science (New York, N.Y.)
|April 9, 2011
まとめ
HD 181068のような階層的な三重系は,星の進化を理解するための鍵です. この研究は,近いバイナリコンパニオンによる潮誘発の振動を持つ赤い巨星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
- 恒星物理学 恒星物理学
- 惑星系外惑星系とは
背景:
- 階層的な三重システムは,恒星形成と進化論のテストに不可欠です.
- これらのシステムは,密接なバイナリペアとより遠い恒星成分で構成されています.
研究 の 目的:
- 広範なフォトメトリックとスペクトロスコピクデータを用いて,階層的なトリプルシステムHD 181068を分析する.
- システム内のダイナミックな相互作用と潮効果を調査する.
主な方法:
- HD 181068.8のためのケプラー光度測定の218日を取得しました.
- 補足は,地上ベースのスペクトロスコピーとインターフェロメトリー.
- 軌道パラメータとシステム構成を決定するために,相互食食の分析.
主要な成果:
- HD 181068は,階層的な三重システムであることを確認しました.
- このシステムは,45日間の軌道を回る赤い巨星と,0.9日間の赤い矮星の密接なバイナリで構成されています.
- 赤い巨人の潮による振動の証拠は,内部のバイナリの動きによって駆動されます.
結論:
- HD 181068は,三重星系におけるダイナミックな進化を研究するための理想的な研究室です.
- このシステムは,潮摩擦と恒星相互作用の理論をテストするユニークな機会を提供します.
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