Formation and Evolution of
Galaxy Clusters Across Cosmic Time

We aim at evaluating the usefulness of adding the near infrared Ks band measured on a 200 squared degrees field by the SHARKS survey (with Ks < 22.7) to other optical surveys in the context of future large experiments such as Euclid and Vera Rubin. In particular, we tested here the combination of the SHARKS data and the Dark Energy Survey (DES). As well as a direct application to real data, we also tested the benefit of the Ks band on a sample of the HORIZON-AGN numerical simulation fulfilling the magnitude limits of SHARKS and DES. In particular, we focused on the precision of photo-z and stellar masses estimates, obtained with LEPHARE and CIGALE with and without Ks. We reached a precision on photo-z of sigma_z (1+z) = 0.08 and on stellar masses of sigma_mass = 0.16$ dex. We expect at least 5.000.000 galaxies with good photo-z estimates up to z=1.5 over 50 squared degrees on the sky with the full cross-match DESxSHARKS. The addition of the Ks band also allow us to better estimate the star formation rate, and hence this catalogue will be very useful to study the quenching mechanisms of galaxies on a rather wide and rather deep survey.