The Assembly and Merging History of Supermassive Black Holes in Hierarchical Models of Galaxy Formation

  title={The Assembly and Merging History of Supermassive Black Holes in Hierarchical Models of Galaxy Formation},
  author={Marta Volonteri and Francesco Haardt and Piero Madau},
  journal={The Astrophysical Journal},
We assess models for the assembly of supermassive black holes (SMBHs) at the center of galaxies that trace their hierarchical buildup far up in the dark halo merger tree. Motivated by the recent discovery of luminous quasars around redshift z ≈ 6—suggesting a very early assembly epoch—and by numerical simulations of the fragmentation of primordial molecular clouds in cold dark matter (CDM) cosmogonies, we assume that the first seed black holes (BHs) had intermediate masses and formed in (mini… 
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    The Astrophysical journal
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