On the number density of 'direct collapse' black hole seeds

@article{Habouzit2016OnTN,
  title={On the number density of 'direct collapse' black hole seeds},
  author={M'elanie Habouzit and Marta Volonteri and Muhammad A. Latif and Yohan Dubois and S{\'e}bastien Peirani},
  journal={Monthly Notices of the Royal Astronomical Society},
  year={2016},
  volume={463},
  pages={529-540}
}
Supermassive black holes (BHs) reside in the centre of most local galaxies, but they also power active galactic nuclei and quasars, detected up to z = 7. These quasars put constraints on early BH growth and the mass of BH seeds. The scenario of ‘direct collapse’ is appealing as it leads to the formation of large mass BH seeds, 104–106 M⊙, which eases explaining how quasars at z = 6–7 are powered by BHs with masses >109 M⊙. Direct collapse, however, appears to be rare, as the conditions required… 

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