初期宇宙におけるレンズ型AGNにおけるブラックホールの高質量比
Lukas J Furtak1, Ivo Labbé2, Adi Zitrin3
1Physics Department, Ben-Gurion University of the Negev, Be'er-Sheva, Israel. furtak@post.bgu.ac.il.
Nature
|February 14, 2024
まとめ
ジェームズ・ウェブ宇宙望遠鏡 (JWST) の初期の観測は,赤色移転 7.0451 で非常に赤くした活性銀河核,アベル2744-QSO1 を明らかにした. このオブジェクトはブラックホールの急速な成長と ブラックホールの質量比が高く ブラックホールの種子と初期のクエーザーの間のギャップを埋めています
科学分野:
- 宇宙 進化 と 天体 物理学
- ブラックホールの成長と銀河の形成
背景:
- ジェームズ・ウェブ宇宙望遠鏡 (JWST) の初期の観測は,見過ごされた超大質量ブラックホールの成長段階を示唆する異常な赤色の源を特定しました.
- アベル2744は 強いレンズを持つ星群で 特に興味深い 赤色の点状の天体を発見しました アベル2744-QSO1と呼ばれています
研究 の 目的:
- JWST/NIRSpecの深層スペクトロスコーピーを用いて,レンズされたオブジェクトAbell2744-QSO1の性質と性質を確認します.
- この初期の活発な銀河核の成長段階と ブラックホールと銀河の質量比を調べるため
主な方法:
- Abell2744-QSO1の深層JWST/NIRSpecスペクトロスクデータを取得し,分析した.
- スペクトル解析により,オブジェクトの識別と赤偏移が確認され,Hβ放出線の幅が測定されました.
- ブラックホールの質量とボロメトリックの明るさを計算し,ブラックホールの質量比を推論した.
主要な成果:
- スペクトロスコピーは,Abell2744-QSO1が単一の,高度に赤くなった (AV 3) 広い線形の活性銀河核で,正確な赤偏移はzspec = 7.0451 ± 0.0005であったことを確認した.
- ブラックホールの質量と,非常に高いブラックホールの質量比 (少なくとも3%,潜在的に100%まで) を得られた.
- 観測された高ボロメトリック光度 (1.1 ± 0.3 × 1045 erg s-1) と強い金属線がないことは,急速な増殖を示している (30%のエディントン限度).
結論:
- Abell2744-QSO1は 初期の宇宙における 超大質量ブラックホールの 急速な成長の重要な段階を表しています
- ブラックホールと銀河の質量比が高く 現在のブラックホールと銀河の共進化モデルに 異議を唱えます
- この発見は,Abell2744-QSO1が初期のブラックホールの種を最初の輝くクエーサーと結びつける重要な移行物体である可能性を示唆しています.
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