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赤の超巨大恒星の周りの光イオン化によって閉じ込められた殻から相互作用する超新星
Jonathan Mackey1, Shazrene Mohamed2, Vasilii V Gvaramadze3
1Argelander-Institut für Astronomie, Auf dem Hügel 71, 53121 Bonn, Germany.
Nature
|August 15, 2014
まとめ
新しいモデルは,ベテルゲウスの静的殻を光イオン化によって説明し,以前の水力学的な説明に挑戦しています. この発見は,赤い超巨大惑星が,超新星光の曲線に衝撃を与える巨大な殻を作り出すことを示唆しています.
科学分野:
- 天文学 天文学
- 天体物理学 天体物理学
- 恒星の進化について
背景:
- 赤い超巨大惑星であるベテルゲウスには,強力な恒星風が吹いて,弓の衝撃を形成しています.
- ベテルゲウス近くの密集した静的な殻は,水力学的な風と恒星間媒体の相互作用モデルに挑戦しています.
- 2つの異なる構造 (弓の衝撃と静的なシェル) は,新しい説明の枠組みが必要であることを示唆しています.
研究 の 目的:
- ベテルゲウゼの密集で静的な殻の形成を説明するために.
- ベテルゲウス周りの弓の衝撃と静的な殻の両方の存在を調和させるために.
- 赤い超巨大星の周回環境の形成における外部の放射線の役割を調査する.
主な方法:
- 外部放射線による光イオン化によるベテルゲウスの恒星風のモデル化.
- フォトイオン化された風によって生成される圧力を分析する.
- 静止ショックと光イオン化によって閉じ込められた殻の形成をシミュレートします.
主要な成果:
- フォトイオン化モデルは,弓の衝撃のダイナミクスを変化させることなく,静的殻をうまく説明します.
- このモデルは,光イオン化された風からの圧力が,静止ショックを生むことを示しています.
- このプロセスは,恒星の周りに静的な,光イオン化によって閉じ込められた殻を形成します.
結論:
- 外部フォトイオン化は,赤い超巨大惑星の周りの密集した静的な殻を形成する有効なメカニズムです.
- これらの殻は,恒星の有意な質量を捕まえて,将来の超新星光の曲線に影響を与えることができます.
- このモデルは,星周相互作用の超新星シグネチャーの自然な説明を提供します.
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