NGC 1068のブラックホールを覆う塵の熱画像
Violeta Gámez Rosas1, Jacob W Isbell2, Walter Jaffe3
1Leiden Observatory, Leiden University, Leiden, Netherlands. gamez@strw.leidenuniv.nl.
Nature
|February 17, 2022
まとめ
NGC 1068の新しい赤外線画像によって,活性銀河核の統一モデルが再確認されています. これらの画像は,厚い,エッジオンディスクによって隠された中央エンジンを明らかにし,最近の改訂よりもオリジナルのモデルをサポートしています.
科学分野:
- 天文学と天体物理学
- 銀河の進化
- 観測宇宙学
背景:
- 統一モデルでは,中心のブラックホールの周りの塵の渦の方向性に基づいて,活性銀河核 (AGN) の分類を説明しています.
- NGC 1068の最近の高解像度画像は,このモデルに異議を唱え,厚いトーラスではなく,薄く傾いた熱い塵のリングを提案しました.
- この再解釈は,タイプ2のAGN分類のための特別の説明を必要とした.
研究 の 目的:
- 2型銀河NGC 1068の構造と塵の分布を調査する.
- 最近の代替解釈に対して統一モデルの有効性をテストする.
- AGNの遮蔽トーラスに関する新しい観測証拠を提供するためです.
主な方法:
- NGC 1068のマルチバンドの中赤外線画像の取得と分析.
- 銀河内の塵の温度分布をマッピングしています.
- 中央エンジンの位置を特定するための新しい無線データの統合 (準備中の原稿).
主要な成果:
- 新しい赤外線画像は 中央エンジンの周りに 厚い,ほぼ縁の遮蔽ディスクの存在を 確認しています
- 中央エンジンは,以前に報告されたリング機能の下にあります.
- 極流からの排出と吸収粉の独特の鉱物学的性質が特定されました.
結論:
- 発見はAGN分類の元の統一モデルを再確認する.
- 厚く,縁の付いたトーラスは,タイプ2のAGNの主な遮蔽構造である.
- この研究は,AGNを理解するための多波長観測の重要性を強調しています.
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