Programme by Session

Feedback from stars and active galactic nuclei (AGN) is the most important process in galaxy formation and evolution. In our cosmological hydrodynamical simulations, we introduced a new AGN model, where super-massive blackholes (SMBHs) originate the first stars with only ~100-1000 Msun, contrary to the merger products in other models. We also have chemical and thermal feedback from core-collapse supernovae (Type II supernovae and hypernovae), Type Ia supernovae, and asymptotic giant branch stars.
As a result, we can reproduce many observations well, including cosmic star formation rates, blackhole mass-galaxy mass relation, size-mass relation, mass-metallicity relations of galaxies, and radial metallicity gradients within galaxies.
With our method, it is possible to have SMSHs in bulge less galaxies or in dwarf galaxies. We also predict that the blackhole mass-galaxy mass relation does not evolve as a function of time, and SMBHs evolve along the relation.