Hydrodynamical Simulations of the Sunyaev Zel'dovich effect
Antonio C. da Silva (1), Domingos Barbosa (2), Andrew R. Liddle (1) and Peter A. Thomas (1)
(1) Astronomy Centre, University of Sussex, Brighton BN1 9QJ, United Kingdom
(2)Lawrence Berkeley Laboratory, 1 Cyclotron Road, Berkeley CA 94710, USA

The Sunyaev--Zel'dovich (SZ) effect is reaching observational maturity. Future experiments, with higher sensitivities and larger frequency coverage, will measure this effect for a large number of clusters and may detect the overall level of SZ distortions to the CMB background. Given that, it is crucial to establish detailed theoretical predictions to interpret observations. We have used hydrodynamical N--body simulations to construct maps of the SZ effect for three popular CDM cosmologies. The study of these maps enabled us to make predictions for a range of properties, such as the mean thermal distortion and source counts at a series of different angular resolutions, including that of the {\sc Planck} satellite.