The Three Hundred project: a large catalogue of theoretically modelled
  galaxy clusters for cosmological and astrophysical applications
  We introduce the THE THREE HUNDRED project, an endeavour to model 324 large
galaxy clusters with full-physics hydrodynamical re-simulations. Here we
present the data set and study the differences to observations for fundamental
galaxy cluster properties and scaling relations. We find that the modelled
galaxy clusters are generally in reasonable agreement with observations with
respect to baryonic fractions and gas scaling relations at redshift z = 0.
However, there are still some (model-dependent) differences, such as central
galaxies being too massive, and galaxy colours (g - r) being bluer (about 0.2
dex lower at the peak position) than in observations. The agreement in gas
scaling relations down to 10^{13} h^{-1} M_{\odot} between the simulations
indicates that particulars of the sub-grid modelling of the baryonic physics
only has a weak influence on these relations. We also include - where
appropriate - a comparison to three semi-analytical galaxy formation models as
applied to the same underlying dark-matter-only simulation. All simulations and
derived data products are publicly available.
