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初期の宇宙における低質量銀河のフィードバック
1Center for Gravitation, Cosmology and Astrophysics, Department of Physics, University of Wisconsin Milwaukee, 3135 North Maryland Avenue, Milwaukee, Wisconsin 53211, USA.
Nature
|July 10, 2015
まとめ
巨大な星のフィードバックは,銀河の流れを駆動し,星形成を調節する. このプロセスはまた,電離放射線の脱出を可能にし,初期の宇宙を再電離させた.
科学分野:
- 天体物理学 天体物理学
- コスモロジー・コスモロジーとは
- 銀河の進化 銀河の進化 銀河の進化
背景:
- 巨大な恒星は,恒星のフィードバックとして知られる過程で,かなりのエネルギーとモメンタムを放出します.
- 恒星のフィードバックは,恒星間のガスを加熱または放出することによって,恒星形成を調節する上で重要な役割を果たします.
- フィードバックによって誘発される銀河のアウトフローは,特に恒星形成銀河や初期の宇宙で観察されています.
研究 の 目的:
- 銀河の進化における恒星のフィードバックの役割を調査する.
- フィードバックが恒星形成率にどのように影響するかを理解するために.
- 宇宙の再イオン化へのフィードバックの貢献を調査する.
主な方法:
- 銀河規模のアウトフローを研究するための観測天文学.
- 恒星形成地域におけるガス特性の分析.
- 初期の宇宙のプロセスをモデル化するための宇宙学的シミュレーション.
主要な成果:
- 星のフィードバックは,ガス除去と加熱によって星形成を抑制することが確認されています.
- 銀河の流出は,恒星形成率が高い銀河では一般的な現象である.
- 低質量銀河のフィードバックは,おそらく電離放射線の脱出を容易にした.
結論:
- 星のフィードバックは,銀河の成長と恒星形成を調節する重要なメカニズムです.
- 初期の宇宙におけるフィードバックプロセスは,宇宙再イオン化に不可欠でした.
- フィードバックを理解することは,銀河の進化と銀河間媒体の理解に不可欠です.
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