M87のブラックホールとジェットをつなぐリング状の蓄積構造

Ru-Sen Lu^1,2,3, Keiichi Asada⁴, Thomas P Krichbaum⁵

¹Shanghai Astronomical Observatory, Chinese Academy of Sciences, Shanghai, People's Republic of China. rslu@shao.ac.cn.

Nature

|April 26, 2023

まとめ

ラジオ銀河M87のニューイベントホライゾン望遠鏡の画像は,より大きく,より厚いリング構造を3.5mmで明らかにしています. ブラックホールの風が吹く可能性を示唆しています

科学分野:

天体物理学
ラジオ天文学

背景:

ラジオ銀河M87はブラックホールの蓄積とジェット形成を研究するための重要なオブジェクトです.
以前の2017年のイベントホライゾン望遠鏡 (EHT) の観測では,中心のブラックホールの周りのリング状の構造が示されました.

研究の目的:

高解像度画像を用いて,M87のコンパクトな無線コアを空間的に解像させる.
異なる波長でM87のブラックホール周辺の蓄積流とジェット発射領域の構造を調査します

主な方法:

2018年にM87の波長3.5mmの高解像度無線画像の取得
ブラックホール近くの観測された環状構造と放射プロフィールの分析.

主要な成果:

M87のコンパクトな無線コアの空間解像度のイメージングは3.5mmです.
リング状の構造は,以前より約50%大きく,厚さ1.3mmで観察されました.
ジェット発射地域からの大量増積流と潜在的な風の証拠

結論:

3.5mmのより大きく,より厚いリングは,レンズによる放出に加えて,吸収効果を持つ有意な蓄積フローを示しています.
観測されたジェットは蓄積フローと接続し,そのより広い排出プロファイルは,蓄積フローで駆動される可能性のある風を示唆します.

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