Black hole mass evolution

V. Vittorini, F. Shankar, A. Cavaliere

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We implement an analytic approach to compute both the trend and the stochastic component to the trigger of the accretion events into BH that power AGNs. We predict that for z < 2.5 the mass distribution of the holes progressively rises and shifts rightwards. Downward of z \sim 2.5 the Eddington ratios of most massive BH drift below unity on average, with a widening scatter; meanwhile, some smaller holes flare up closer to the Eddington limit.