A systematic investigation of candidate high-redshift galaxies in JWST deep fields

Thanks 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.