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Bringing the Visible Universe into Focus with Robo-AO
Published on: February 12, 2013
最年少の低質量原星体を取り囲む塵のついた円盤を通る窓
J Cernicharo1, A Noriega-Crespo, D Cesarsky
1Consejo Superior de Investigaciones Científicas, Instituto de Estructura de la Materia, Departamento Física Molecular, Serrano 121, 28006 Madrid, Spain. cerni@astro.iem.csic.es
まとめ
私たちは,赤外線宇宙天文台を使用して,若い原星VLA1からの中赤外線 (中赤外線) 放射を検出しました. これは,原星の最も内部の領域を明らかにし,以前は遮蔽ディスクによって隠されていた.
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
- 赤外線天文学の天文学
背景:
- 若い低質量恒星形成には,周周円盤の蓄積と質量損失が含まれます.
- クラス0プロトスターは,光学波長と赤外線波長で大きく遮られ,観測を妨げています.
- ラジオ干渉計は,これらの隠された初期段階の原星を検出する主な方法でした.
研究 の 目的:
- クラス0原星VLA1.1からの中赤外線 (中赤外線) 放射を検出する.
- 以前は周周円盤に隠されていた若い原星の最も内部の領域を調査するために.
- 氷やシリケートによる吸収が最小限で,特定の中部IR波長ウィンドウを使用します.
主な方法:
- 中赤外線観測のため,赤外線宇宙観測所 (ISO) を利用した.
- 波長ウィンドウ (5.3,6.6,7.5マイクロメートル) に焦点を当て,星間吸収が低い.
- オリオン星雲のHH1-HH2領域からの放射を分析した.
主要な成果:
- クラス0原星VLA1.1からの中赤外線放射を成功裏に検出しました.
- 放射は,コンパクトな中央源 (約. 4AUの直径) で,気温は ~700Kである.
- 原星は,高視界の絶滅 (80-100の大きさ) の領域に深く埋め込まれています.
結論:
- 中赤外線観測により,若い原星の隠された内部の領域を探査することができます.
- 検出された放射は,最も内側の原星系の物理的条件についての洞察を提供します.
- この方法は,以前はアクセスできない初期の恒星進化の段階を研究するための新しい道を開きます.
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