A Heating Model for the Millennium Gas Run

Summary

The comparison between observations of galaxy clusters thermo-dyna-mical properties and theoretical predictions suggests that non-gravitational heating needs to be added into the models. We implement an internally self-consistent heating scheme into Gadget-2 for the third (and fourth) run of the Millennium gas project (Pearce et al. in preparation), a set of four hydrodynamical cosmological simulations with N=2X(5X10⁸) particles and with the same volume (L=500 h ^-1 Mpc) and structures as the N-body Millennium Simulation (Springel et al. 2005). Our aim is to reproduce the observed thermo-dynamical properties of galaxy clusters.