The evolution of the galaxy content of dark matter haloes

Understand

We use the halo occupation distribution (HOD) framework to characterise the predictions from two independent galaxy formation models for the galactic content of dark matter haloes and its evolution with redshift.

• Our galaxy samples correspond to a range of fixed number densities defined by stellar mass and span $0 \le z \le 3$.
• We find remarkable similarities between the model predictions.
• Differences arise at low galaxy number densities which are sensitive to the treatment of heating of the hot halo by active galactic nuclei.