Early co-evolution between SMBH and host-galaxy
Francesco Salvestrini (INAF - OATS)
Tuesday 25/03/2025 @ 14:00, Sala Antonio Sollima (IV piano Battiferro)
The coexistence between the outstanding mass growth of the Supermassive Black Holes (SMBHs; MBH~10^8-10 Msun) in z>6 quasars, and the concurrent growth of their host galaxies, still challenges theoretical models aimed at explaining how these systems formed in less than 1 Gyr. While the characterization of high-z quasars has been achieved thanks to large surveys in the rest-frame UV-optical bands, the knowledge of how quasar host-galaxies build up and evolve can only be achieved with far-IR/sub-mm observations. Furthermore, sub-mm observations have proved to be a reliable probe of the obscured star formation, which constitutes a significant, or even dominant, fraction of star formation at early epochs. In this context, I will present new and archival mm observations to characterize the molecular gas reservoirs, star formation rates, and dust properties in all known quasars at z>7 quasars. By comparing our sample with quasars at different epochs and the results of semi-analyst models (GAEA), we discuss the role of quasars in shaping the growth and evolution of their host galaxy.