SuperModel Predictions in the Outskirts of the Galaxy Cluster Zwicky
  3146
  The relaxed galaxy cluster Zwicky 3146 is analyzed via the SuperModel, a tool
already tested on many clusters since 2009. In particular, this analysis is
focused on the intracluster medium X-ray temperature data measured by
XMM-Newton up to r_{500}. A previous analysis was based on the temperature
profile derived from the Sunyaev-Zeldovich effect pressure data. The gas mass
fraction f_{gas} is obtained from the resulting SuperModel temperature profile
extrapolated up to the virial radius R, that turns out in agreement with the
steep temperature profiles observed by Suzaku, and from the gas density profile
observed by XMM-Newton. The comparison between f_{gas} with the universal value
indicates a non-thermal pressure component, p_{nth}, in the cluster outskirts.
The SuperModel analysis shows a ratio alpha(R) (about 50%) of p_{nth} to the
total pressure greater than the values found by simulations, highlighting the
possible presence of accreting substructures and inhomogeneities in the gas
density profile. Once that this profile is corrected for clumpiness, the level
of p_{nth} is considerably reduced. However, a significant turbulence (alpha(R)
about 20%) and entropy flattening are still present in the outskirts of the
galaxy cluster Zwicky 3146.
