活発な銀河1H 0707-495の鉄のKとL殻の移行からの広線放射
A C Fabian1, A Zoghbi, R R Ross
1Institute of Astronomy, Madingley Road, Cambridge CB3 0HA, UK. acf@ast.cam.ac.uk
Nature
|May 30, 2009
まとめ
狭い線状のセイフェルト1銀河1H 0707-495で検出された広い鉄のKとL線は,回転するブラックホールのイベント地平線近くの放射を示唆しています. この発見は,超大質量ブラックホールに近い相対論的効果の証拠を提供します.
科学分野:
- 天体物理学 天体物理学
- 高エネルギー天体物理学
- ブラックホール物理学 ブラックホール物理学
背景:
- 広範囲の鉄のK線放射は,ブラックホールの回転に敏感なアクレート系において観察される.
- 鉄のL線放射は,鉄の豊富度が高いと予想されますが,しばしば隠されています.
- セイファート銀河は,超大質量ブラックホールによって動いている活発な銀河核である.
研究 の 目的:
- 狭い線のセイフェルト1銀河1H 0707-495.5のスペクトルとタイミングの性質を調査する.
- 鉄Kと鉄Lの両方の排出ラインを検索する.
- 超大質量ブラックホールのイベント地平線に近い領域を調査する.
主な方法:
- 鉄KとLの放射線を特定するために,X線データのスペクトル分析.
- 直射と反射のX線放射の間の反響の遅延を測定するためのタイミング分析.
- ラインプロファイルとタイミングシグナルを解釈するための相対論的効果のモデリング.
主要な成果:
- 1H 0707-495.5で明るい鉄Kと鉄Lの両方の排出ラインの検出
- 連続波と反射波の間の ~30秒の反響の遅延を測定する.
- 観測された遅延は,ブラックホールから1光分以内の物質からの放射と一致しています.
結論:
- 組み合わせたスペクトルデータとタイミングデータは,イベント地平線に非常に近い物質からの放射を強く示している.
- この発見は,1H 0707-495.5で急速に回転する巨大なブラックホールの証拠を提供します.
- この研究は,極端なブラックホールの環境を調査する際のスペクトル分析とタイミング分析の力を実証しています.
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