A simulatedτCDM cosmology cluster catalogue: the NFW profile and the temperature-mass scaling relations

We have extracted over 400 clusters, covering more than two decades in mass, from three simulations of the t CDM cosmology. This represents the largest uniform catalogue of simulated clusters ever produced. The clusters exhibit a wide variety of density profiles. Only a minority are well-fitted in their outer regions by the widely used density profile of Navarro, Frenk however, the normalization is lower than the value inferred for observed clusters. The temperaturemass relations for properties measured within a fixed physical radius are significantly steeper then this. Both can be accurately predicted using the NFW model.