Journal article

A physical model for the luminosity function of high-redshift quasars

JSB Wyithe, A Loeb

ASTROPHYSICAL JOURNAL | IOP PUBLISHING LTD | Published : 2002

Abstract

We provide a simple theoretical model for the quasar luminosity function at high redshifts that naturally reproduces the statistical properties of the luminous Sloan Digital Sky Survey (SDSS) quasar sample at redshifts z ∼ 4.3 and z ≳ 5.7. Our model is based on the assumptions that quasar emission is triggered by galaxy mergers and that the black hole mass is proportional to a power law in the circular velocity of the host galactic halo, vc. We assume that quasars shine at their Eddington luminosity over a time proportional to the mass ratio between the small and final galaxies in the merger. This simple model fits the quasar luminosity function at z ∼ 2-3, reproduces the normalization and l..

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University of Melbourne Researchers