巨大なブラックホールや銀河の膨張の同時代の成長に対するサブミリメートルの証拠
M J Page1, J A Stevens, J P Mittaz
1Mullard Space Science Laboratory, University College London, Holmbury St. Mary, Dorking, Surrey RH5 6NT, UK. mjp@mssl.ucl.ac.uk
Science (New York, N.Y.)
|November 3, 2001
まとめ
巨大なブラックホールと銀河の突起は,一緒に成長します. 初期の宇宙のスターバーストは,ブラックホールの成長と同時にほとんどの星を形成し,宇宙のブラックホールの集団を説明している可能性が高い.
科学分野:
- 天文学と天体物理学について
- 宇宙進化の宇宙進化について
- 銀河の形成 銀河の形成
背景:
- ブラックホールの質量と近くの銀河の恒星の膨らみ質量の間には,既知の相関関係がある.
- これは,超大質量ブラックホールと,それらの宿主銀河の球体体間の共同進化的関係を示唆しています.
- アクティブな銀河核 (AGN) は,銀河の進化とブラックホールの成長を理解するために不可欠です.
研究 の 目的:
- 巨大なブラックホールと銀河の膨張の形成のタイムラインを調査する.
- スターバーストの活動がブラックホールの早期増殖と関連しているという仮説を検証するために.
- 初期の宇宙の恒星形成の歴史を,無線静かなAGNで探求する.
主な方法:
- サブミリメートルフォトメトリーは,X線で吸収された8つの活発な銀河核に実施されました.
- 観測は,高蓄積光度特有の光度と赤色移転を有する源に焦点を当てた.
- データ分析は,粉塵と星形成を推論するために850マイクロメートルの放射を検出することに焦点を当てました.
主要な成果:
- 850マイクロメートルで4つの高赤偏移源が検出され,流動密度は5.9~10.1ミリヤンスキーであった.
- これらの検出された光源は,超光赤外線銀河 (ULIRGs) と分類されています.
- 検出率は赤道移転によって変化し,星形成の初期の時代を示唆しています.
結論:
- この発見は,球体における重要な恒星形成が,主要なブラックホールの増殖と同時に行われたという考えを裏付けている.
- この共形成時代は,局所宇宙における巨大なブラックホールの観測された分布を説明できる.
- 結果は,無線静寂銀河と無線銀河の両方にとって共通の,初期の恒星形成時代を示しています.
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