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M87の超大質量ブラックホールの近くで解明されたジェット発射構造
Sheperd S Doeleman1, Vincent L Fish, David E Schenck
1MIT Haystack Observatory, Off Route 40, Westford, MA 01886, USA. sdoeleman@haystack.mit.edu
Science (New York, N.Y.)
|September 29, 2012
まとめ
研究者らは,ラジオ干渉計を用いてM87の相対論ジェットの底部を観測した. ジェットの小さな大きさから,反転するブラックホールではなく,回転するブラックホールの周りを回る,進んだ蓄積円盤によって動いていることがわかります.
科学分野:
- 天体物理学 天体物理学
- ラジオ天文学 ラジオ天文学
- ブラックホール物理学 ブラックホール物理学
背景:
- 活発な銀河核 (AGN) は,超大質量ブラックホールの蓄積によって推進される相対論ジェットをしばしば特徴とする.
- 大規模で観測されたジェット幅プロファイルは,磁気コリマーション理論と一致しています.
- 積層円盤の近く,打ち上げ地点にあるジェットの構造は検出されないままです.
研究 の 目的:
- 活発な銀河核M87.7の相対論ジェットの基礎を空間的に解明する.
- ジェット機の打ち上げに起因する蓄積円盤のダイナミクスを調査するために.
- ジェット形成と動力源のモデルをテストする.
主な方法:
- 1.3ミリ波長での高解像度無線干渉計観測を用いた.
- 有名な相対論ジェットで知られている円銀河M87に焦点を当てました.
- 電波の放射を分析して,ジェットのベースサイズと構造を決定した.
主要な成果:
- M87ジェットのベースを空間的に解明しました.
- ジェットのベースサイズが5.5 ± 0.4シュワルツシールト半径であることを決定しました.
- この大きさは,逆行収縮円盤の内縁より小さい.
結論:
- M87ジェットは,プログラデ軌道にある増積円盤によって動いている可能性が高い.
- 旋回するブラックホールがジェット機の打ち上げに関与していることを示唆している.
- ジェットパワーのレトログラード・アクレション・ディスクに依存するチャレンジ・モデル.
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