NICE: Unveiling the physics of galaxy cluster formation at high redshifts with NOEMA
Galaxy cluster at z=2.915 associated with a diffuse Lyα emission
likely revealing the accretion of cold gas from the cosmic web
Credit: Daddi et al. (2021)
Clusters of galaxies are the most massive bound structures in the Universe. Today, they are mainly composed of so-called dead galaxies (i.e. without star formation activity) containing mostly very old stars. To understand how these objects were formed, we need to go back in time, to the epochs when they were assembled.