Environmental effects in the Spiderweb protocluster at z=2.16

We use multi-object near-IR spectroscopy with KMOS to investigate the role of the environment in the evolution of the gas properties of galaxies in the Spiderweb protocluster at z=2.16. Based on rest-frame optical emission lines, [NII]6584 and Hα, we measure star-formation rates (SFR), gas-phase oxygen abundances, and the gas kinematics of 40 protocluster members as a function of local density and global environment properties. Our results show that galaxies embedded in this structure display on average higher SFRs and metallicity values compared to their field counterparts at similar redshift, while our kinematic analysis yields relatively low gas velocity dispersion for most galaxies, arguing against strong gravitational interactions between protocluster members at this stage. We discuss the implications of these results on different scenarios of environmentally driven galaxy evolution during the early stages of massive cluster assembly.