The Halo Occupation Distribution of Active Galactic Nuclei

Understand

Using a fully cosmological hydrodynamic simulation that self-consistently incorporates the growth and feedback of supermassive black holes and the physics of galaxy formation, we examine the effects of environmental factors (e.g., local gas density, black hole feedback) on the halo occupation distribution of low luminosity active galactic nuclei (AGN).

• We decompose the mean occupation function into central and satellite contribution and compute the conditional luminosity functions (CLF).
• The CLF of the central AGN follows a log-normal distribution with the mean increasing and scatter decreasing with increasing redshifts.
• We analyze the light curves of individual AGN and show that the peak luminosity of the AGN has a tighter correlation with halo mass compared to instantaneous luminosity.