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巨大なブラックホールによる恒星の破壊から生じた非常に明るいジェット
Igor Andreoni1,2,3, Michael W Coughlin4, Daniel A Perley5
1Joint Space-Science Institute, University of Maryland, College Park, MD, USA. andreoni@umd.edu.
Nature
|November 30, 2022
まとめ
天文学者は光学的な光でAT2022cmc,ジェットされた潮破壊イベント (TDE) を検出しました. この発見は,相対論的なジェットを持つ TDE の集団を明らかにし,超大質量ブラックホールの増殖に関する新しい洞察を提供します.
科学分野:
- 天体物理学
- 宇宙学
- ブラックホール物理学
背景:
- 超大質量ブラックホールによって星が破壊されたとき,潮破壊現象 (TDE) が起こります.
- 相対論的なジェットを含む稀なイベントであるジェット型TDEは,観測上の課題のために十分に理解されていません.
- スウィフトJ1644+57は最もよく研究されたTDEですが,光学データはありません.
研究 の 目的:
- 新しい噴射されたTDE,AT2022cmcの光学検出と特徴を報告する.
- 噴射されたTDEの条件と速度を調査する.
- 同様の現象を発見するためのプロトタイプとしてAT2022cmcを確立する.
主な方法:
- AT2022cmcの光学検出と光曲線分析
- 多波長観測 (X線,サブミリメートル,無線) で対照部位を特定する.
- 噴射されたTDEの割合を決定するためにZwicky Transient Facilityの調査データを分析する.
主要な成果:
- AT2022cmcは,赤偏差 z=1.19325で,独特の光の曲線が,明るい高原に移行していることを示しました.
- 多波長データでAT2022cmcは シンクロトロン後発光で噴射されたTDEであると確認した.
- 軸上に投下されたTDEの推定速度は,年に1ギガパスカルの立方体あたり[式:テキストを参照]です.
- AT2022cmcの超大質量ブラックホールは,スピン>0.3を持っている可能性が高い.
結論:
- 光学調査は,テンプレートとしてAT2022cmcを使用して,噴射されたTDEを識別できます.
- 約1%のTDEは相対論ジェットを発射する.
- ブラックホールの蓄積とジェット発射の仕組みの理解を深めることができるでしょう.
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