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銀河の形成と進化におけるブラックホールの役割
A Cattaneo1, S M Faber, J Binney
1Astrophysikalisches Institut Potsdam, An der Sternwarte 16, 14482 Potsdam, Germany. acattaneo@aip.de
Nature
|July 10, 2009
まとめ
銀河の巨大な中央ブラックホールは,恒星形成を止めることができるエネルギーを放出します. この過程は,大型円銀河が,渦巻き銀河よりも若い恒星が少ない理由を理解する上で重要なものです.
科学分野:
- 天体物理学 天体物理学
- 銀河の進化 銀河の進化 銀河の進化
背景:
- 巨大な銀河には,数百万から数十億の太陽質量を持つ超大質量ブラックホール (SMBH) が宿っている.
- SMBHの成長は,活発な銀河核 (AGN) を動かし,莫大なエネルギーを放出します.
- AGNエネルギーの一部は,ガスを熱して放出することができ,宿主銀河内の恒星形成を潜在的に停止させます.
研究 の 目的:
- 巨大な円銀河の恒星形成を抑制する活動的な銀河核のフィードバックの役割を調査する.
- 円銀河と螺旋銀河の星形成活動の違いを理解する.
主な方法:
- 観測天文学は,観測による天文学である.
- 銀河系調査の調査
- スペクトロスコーピーは,スペクトロスコーピーを用います.
主要な成果:
- 証拠によると,AGNフィードバックは,巨大な銀河の恒星形成を抑制する重要な要因であると示唆しています.
- 円銀河は,フィードバックモデルと一致する螺旋銀河と比較して,進行中の恒星形成の割合が低いことを示しています.
結論:
- 超大質量ブラックホールのフィードバックは,銀河の進化,特に巨大な円銀河の進化を形作る上で重要な役割を果たします.
- 円銀河の恒星形成の停止は,その中心のブラックホールからのエネルギー放出によって主に引き起こされます.
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