X-ray emission from high-redshift miniquasars: self-regulating the population of massive black holes through global warming

@article{Tanaka2012XrayEF,
  title={X-ray emission from high-redshift miniquasars: self-regulating the population of massive black holes through global warming},
  author={Takamitsu L. Tanaka and Rosalba Perna and Zolt{\'a}n Haiman},
  journal={Monthly Notices of the Royal Astronomical Society},
  year={2012},
  volume={425},
  pages={2974-2987}
}
Observations of high-redshift quasars at z � 6 imply that supermassive black holes (SMBHs) with masses M � 10 9 M⊙ were in place less than 1 Gyr after the Big Bang. If these SMBHs assembled from “seed” BHs left behind by the first stars, then they must have accreted gas at close to the Eddington limit during a large fraction ( � 50%) of the time. A generic problem with this scenario, however, is that the mass density in M � 10 6 M⊙ SMBHs at z � 6 already exceeds the locally observed SMBH mass… Expand

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