Speaker
Description
By exploiting the synergy between ALMA, JWST/NIRSpec IFU and VLT/MUSE, we can now probe the multi-phase morphology and kinematics of the gaseous reservoirs in massive galaxies within the first Gyr of cosmic time. Sensitive, spatially resolved observations are essential to trace inflows and outflows and to map the distribution of metals across both interstellar (ISM) and circumgalactic (CGM) scales. These data are key to identify the dominant channels and overall impact of black hole feedback at such early epochs, by constraining the baryon cycle over timescales an order of magnitude longer than previous studies limited to ISM scales. I will present evidence for simultaneous gas inflows and outflows on CGM scales around massive galaxies at z>6 and discuss the implications for early galaxy–black hole co-evolution. This perspective —treating galaxies as deeply embedded within their surrounding environments— opens a new window for high-redshift studies of galaxy evolution with upcoming facilities such as the ELT and SKA.