若い低質量多星系GG Tau Aの惑星形成の可能性
Anne Dutrey1, Emmanuel Di Folco1, Stéphane Guilloteau1
11] Université de Bordeaux, LAB, UMR 5804, F-33270 Floirac, France [2] Centre National de la Recherche Scientifique (CNRS), LAB, UMR 5804, F-33270 Floirac, France.
Nature
|October 31, 2014
まとめ
二重星の周りの惑星の形成は複雑です. 新しい観測により,GG Tau Aシステム内で流れる一酸化炭素ガスが明らかになった.
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:
- 惑星の形成は,単一星よりも二重星の周りに理論的により困難です.
- 密集バイナリー系には,内側の環恒星円盤と,中央の空洞を持つ外側の環バイナリー円盤がある.
- 内部円盤は急速に枯渇し,惑星形成のために外部の貯水池から物質の移転が必要になります.
研究 の 目的:
- GG Tau A円盤の空洞内の冷たいガスの存在とダイナミクスを調査する.
- ガス流が二重星系における惑星形成のための内部の円盤を維持できるかどうかを判断する.
主な方法:
- 先進的なイメージング技術を使用して,GG Tau Aシステムの中央空洞内のガス断片を検出しました.
- 観測されたガスの動力学を分析し,その流れと起源を理解しました.
主要な成果:
- GG Tau A洞穴内の一酸化炭素の特徴的な放射線を放射するガスの断片を画像化することに成功しました.
- 運動分析は,GG Tau Aa.の周囲の内部の円盤を補充できるガス流れを示しています.
- この流れは,通常の蓄積寿命を超えて内部の円盤を維持することができます.
結論:
- 観測されたガスの流れは,二重星系における内部円盤の補充をサポートし,惑星の形成を促進します.
- これらの発見は,複数の恒星の周りの惑星形成の複雑なプロセスを強調しています.
- この結果は,二重星系における惑星形成の数値シミュレーションから得られた予測と一致し,それを確認している.
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