We derive quantitative predictions of the optical and X-ray luminosity functions for quasars in the redshift range z ∼< 3. Based on accreting black holes as primary sources for the quasar outputs, we investigate how the accretion is controlled by the surrounding structures, as these grow hierarchically from the formation of the host galaxies to their… (More)
FIG. 1 – The probability distribution P (f) that a fraction f of gas is destabilized during an encounter, in the cases discussed in §2.1 of the text: A (solid line); B (dashed line); C (dotted line). Press & Schechter 1974 distribution for the partner masses from M ′ = 51010 to 5 1012 M⊙.