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銀河M82にある400太陽質量のブラックホールです
Dheeraj R Pasham1, Tod E Strohmayer2, Richard F Mushotzky3
11] Astronomy Department, University of Maryland, College Park, Maryland 20742, USA [2] Astrophysics Science Division and Joint Space-Science Institute, NASA Goddard Space Flight Center, Greenbelt, Maryland 20771, USA.
Nature
|August 19, 2014
まとめ
研究者らは,中間質量ブラックホールであるM82 X-1で安定したX線準周期振動を発見した. この発見は,このブラックホールの約428太陽質量のより正確な質量推定を提供します.
科学分野:
- 天体物理学 天体物理学
- X線天文学 X線天文学
- ブラックホール物理学 ブラックホール物理学
背景:
- M82 X-1は,銀河M82で最も明るいX線源であり,以前は,質量の不確実性のある中等質量ブラックホール (100-10,000太陽質量) と見積もられていた.
- 以前の質量推定は,低周波の時間スケールに依存しており,大きな不確実性を導入しました.
研究 の 目的:
- 中間質量ブラックホールM82 X-1のより正確な質量を決定するために.
- ブラックホールの質量を正確に決定するための高周波準周期振動の可能性を調査する.
主な方法:
- M82 X-1からの高周波 (3:2比) のX線準周期性振動 (QPOs) の検出と分析.
- 恒星質量ブラックホールで観測された逆質量スケーリング関係をM82 X-1に推計する.
- 質量推定のための相対論的プレセシオンモデルの適用.
主要な成果:
- M82 X-1から3.32 ± 0.06 Hzと5.07 ± 0.06 Hzで安定した双峰X線QPOsの発見
- M82 X-1のブラックホールの推定質量は,反質量スケーリングを用いて,太陽質量428 ± 105である.
- M82 X-1のブラックホールの質量は,相対論的プレセーションモデルを用いて,太陽質量415 ± 63であると推定されています.
結論:
- 安定した高頻度QPOは,中間質量ブラックホールの質量を推定するための曖昧さのない方法を提供します.
- M82 X-1の質量は,約400~430太陽質量と推定されており,その質量の中間の状態が確認されています.
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