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有读书笔记Major Galaxy Mergers and the Growth of Supermassive Black Holes in Quasars

1 shizhao 添加于 2010-4-8 14:58 | 1851 次阅读 | 0 个评论
  •  作 者

    Treister E, Natarajan P, Sanders DB, Urry CM, Schawinski K, Kartaltepe J
  •  摘 要

    Despite observed strong correlations between central supermassive black holes (SMBHs) and star-formation in galactic nuclei, uncertainties exist in our understanding of their coupling. We present observations of the ratio of heavily obscured to unobscured quasars as a function of cosmic epoch up to z 3, and show that a simple physical model describing mergers of massive, gas-rich galaxies matches these observations. In the context of this model, every obscured and unobscured quasar represents two distinct phases that result from a massive galaxy merger event. Much of the mass growth of the SMBH occurs during the heavily obscured phase. These observations provide additional evidence for a causal link between gas-rich galaxy mergers, accretion onto the nuclear SMBH, and coeval star formation.
  •  详细资料

    • 文献种类: Journal Article
    • 期刊名称: Science
    • 期刊缩写: Science
    • ISBN: 0036-8075
  • 学科领域 自然科学 » 天文学

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