# High-redshift quasars and the supermassive black hole mass budget: constraints on quasar formation models

@article{Bromley2004HighredshiftQA,
title={High-redshift quasars and the supermassive black hole mass budget: constraints on quasar formation models},
author={Jane M. Bromley and Rachel S Somerville and Andrew C. Fabian},
journal={Monthly Notices of the Royal Astronomical Society},
year={2004},
volume={350},
pages={456-472}
}
• Published 3 November 2003
• Physics
• Monthly Notices of the Royal Astronomical Society
We investigate the constraints on models of supermassive black hole (SMBH) and quasar formation obtainable from two recent observational developments: the discovery of luminous quasars at z ∼ 6, and estimates of the local mass density of SMBHs. If ∼90 per cent of this mass was accreted at redshifts z ≤ 3, as suggested by the observed quasar luminosity functions, these joint constraints pose a challenge for models, which must account for the observed luminous quasar population at z ∼ 6 within a… Expand
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