openThanks to the deep JWST survey carried in the SMACS 0723 cluster, there has been
the discovery of an interesting population of objects not observed by the previous
optical telescope, such as HST, and whose nature is still under investigation. The
aim of this work is to compare the physical parameters obtained through the spectral
energy distribution modelling technique applied on a sample of 19 galaxies present
in this field, chosen for their very red near-infrared colours, being undetected at
λobs < 2μm. Aiming to provide an accurate systematic investigation, the photometric
analysis of these sources has been carried out through several software tools. Hence,
this work intends to find discrepancies among the results obtained through the
different photometric analysis, confronting the outputs obtained, as well as to check
their consistency, in order to understand how much the choice of the technique can
influence the results and therefore our understanding of the nature of high-redshift
galaxies properties. In a future perspective, this kind of investigation can be
enlarged adding various others photometric databases of deep JWST surveys, along
with considering alternative tools for both photometric analysis and spectral energy
distribution fitting
