Blind detection of galaxy clusters in the COSMOS field via the SZ effect

Clusters of galaxies are powerful cosmological probes, and the thermal Sunyaev Zel’dovich (tSZ) effect provides an efficient method for their detection. High-angular-resolution observations, such as those provided by the NIKA2 camera on the IRAM 30-m telescope, are essential to target low mass and high-redshift clusters. We performed a blind search for galaxy clusters in the COSMOS field using 150 GHz data from the NIKA2 Cosmological Legacy Survey. We applied a matched-filter technique based on a universal pressure profile to extract cluster candidates. The purity and completeness of the sample were assessed using realistic simulations. We detected 16 cluster candidates above an S/N of 4, eight of which have confirmed counterparts.