Testing the Accuracy of Halo Occupation Distribution Modelling using Hydrodynamic Simulations

Understand

Halo models provide a simple and computationally inexpensive way to investigate the connection between galaxies and their dark matter haloes.

• However, these models rely on the assumption that the role of baryons can be easily parametrized in the modelling procedure.
• We aim to examine the ability of halo occupation distribution (HOD) modelling to reproduce the galaxy clustering found in two different hydrodynamic simulations, Illustris and EAGLE.
• For each simulation, we measure several galaxy clustering statistics on two different luminosity threshold samples.