The Three Hundred-NIKA2 Sunyaev-Zeldovich Large Program twin samples:
  Synthetic clusters to support real observations
  The simulation database of THE THREE HUNDRED Project has been used to pick
synthetic clusters of galaxies with properties close to the observational
targets of the NIKA2 camera Sunyaev-Zeldovich (SZ) Large Program.
Cross-matching of cluster parameters such as mass and redshift of the cluster
in the two databases has been implemented to generate the so-called twin
samples for the Large Program. This SZ Large Program is observing a selection
of galaxy clusters at intermediate and high redshift $\left( 0.5 < z < 0.9
\right)$, covering one order of magnitude in mass. These are SZ-selected
clusters from the Planck and Atacama Cosmology Telescope catalogs, wherein the
selection is based on their integrated Compton parameter values, $Y_{500}$: the
value of the parameter within the characteristics radius $R_{500}$.
  THE THREE HUNDRED hydrodynamical simulations provide us with hundreds of
clusters satisfying these redshift, mass, and $Y_{500}$ requirements. In
addition to the standard post-processing analysis of the simulation, mock
observational maps are available mimicking X-ray, optical, gravitational
lensing, radio, and SZ observations of galaxy clusters. The primary goal of
employing the twin samples is to compare different cluster mass proxies from
synthetic X-ray, SZ effect and optical maps (via the velocity dispersion of
member galaxies and lensing $\kappa$-maps) of the clusters. Eventually, scaling
laws between different mass proxies and the cluster mass will be
cross-correlated to reduce the scatter on the inferred mass and the mass bias
will be related to various physical parameters.
