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ブラックホール は 大量 の 銀河 の 中 で 寒い ガス の 蓄積 を 制御 し て い ます
Tao Wang1,2, Ke Xu3,4, Yuxuan Wu3,4
1School of Astronomy and Space Science, Nanjing University, Nanjing, China. taowang@nju.edu.cn.
Nature
|August 14, 2024
まとめ
超大質量ブラックホール (BHs) は銀河のガス含有量を大きく調整する. 質量は原子水素 (HI) ガスレベルの主な原動力であり,ガス冷却を放出または抑制することによって銀河の進化に影響を与えます.
科学分野:
- 天体物理学
- 銀河の進化
- ブラックホール物理学
背景:
- 巨大な銀河には超大質量ブラックホール (BH) が宿っている.
- BHフィードバックは銀河の静止を調節すると理論化されているが,恒星形成への影響については議論されている.
- BHsと銀河のガス含有量を直接関連付ける証拠は不足している.
研究 の 目的:
- 超大質量ブラックホールが 銀河のガス貯蔵庫に及ぼす直接的な影響を 研究するためです
- 巨大銀河の原子水素 (HI) ガス含有量の主要な原動力を決定する.
- 冷たいガスを調節するBHフィードバックメカニズムの証拠を提供するために.
主な方法:
- BHと原子水素 (HI) の質量を測定した近くの銀河の大きなサンプルを分析した.
- HIガスの質量と恒星の質量比 (μHI) を計算した.
- BH質量 (MBH) と他の銀河のパラメータ (恒星質量,表面密度,膨張質量) と相関する.
主要な成果:
- HIガス質量と恒星質量比 (μHI) は,BH質量 (MBH) と最も強い相関を示している.
- MBHは,他の銀河系パラメータを上回る μHIの主な原動力として特定されています.
- この相関は様々な銀河の種類や環境で当てはまります
結論:
- 超大質量ブラックホールの質量は 銀河の冷たいガスの含有量を調節する重要な要因です
- BHの蓄積エネルギーは,星間媒体のガスを放出したり,銀河周回媒体のガスの冷却を抑制したりする.
- これらの発見は,銀河のガス貯蔵庫と恒星形成に影響を与える BH フィードバックの直接的な証拠を提供します.
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