ブラックホール物理学 ブラックホール物理学 ブラックホールの稲妻は,亜地平線スケールでの粒子加速によるものです
J Aleksić1, S Ansoldi2, L A Antonelli3
1Institut de Física d'Altes Energies, Campus UAB, E-08193 Bellaterra, Spain.
Science (New York, N.Y.)
|November 8, 2014
まとめ
ラジオ銀河IC 310のガンマ線観測は急速な変動性を明らかにし,超大質量ブラックホール近くの小さな領域からの放射を示唆した. この発見は,活発な銀河核のジェット形成に関する新しい洞察を提供します.
科学分野:
- 天体物理学 天体物理学
- 高エネルギー天文学 高エネルギー天文学
- ブラックホール物理学 ブラックホール物理学
背景:
- 超大質量ブラックホールは銀河の中心部に存在し,エネルギッシュなジェットに電力を供給しています.
- ジェット形成のイメージングは,電波天文学の角度解像度が限られているため,困難です.
- 放射の時間変動は,小規模な構造物を探査するための代替方法を提供します.
研究 の 目的:
- ラジオ銀河IC 310の放射機構と領域の大きさを調査する.
- メジャー大気ガンマ線画像チェレンコフ (MAGIC) 望遠鏡からのデータを用いてガンマ線変動性を分析する.
- 観測された変動の時間スケールに基づいて,排出地域の大きさを制限する.
主な方法:
- MAGIC望遠鏡からのガンマ線観測を用いて.
- IC310からのガンマ線放射の時間変動性を分析する.
- 排気地域の大きさを推定するために因果関係原理を適用する.
主要な成果:
- IC310で急速なガンマ線変動が検出され,4.8分より速い倍増の時間スケールが検出されました.
- ブラックホールの重力半径の20%未満に排出領域のサイズを制限しました.
- 観測された変動性は,ジェット基地のコンパクトな排出領域を示唆しています.
結論:
- 急速な変動は,小さな領域,おそらく磁気圏のギャップで,効率的な粒子加速を示しています.
- この発見は,パルサーのような粒子加速がラジオジェットに電力を供給するモデルを裏付けている.
- この研究は,活発な銀河核のジェットの物理学の重要な観察的制約を提供します.
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