Abstract
| Cammelli |
|---|
| Formation of SMBHs via PopIII.1 star and dark matter annihilation: implication for host galaxies |
| The birth of supermassive black holes (SMBHs) that reside in the nuclei of massive galaxies is one of the most compelling topic of current research, involving various astrophysical and cosmological phenomena. Among different scenarios, the first (PopIII.1) isolated stars in the universe, forming at $z>20$ in dark matter minihalos in primirdial environment, are affected by dark matter annihilation heating that allows them to grow to ~100,000 solar masses and become the progenitors of all SMBHs. We follow the redshift evolution of synthetic galaxies by exploiting state-of-the-art semi-analytic model PinGAEA (Pinocchio code coupled with GAEA model) of galaxy formation, including SMBHs. Our approach enables to connect merger histories of dark matter halos directly to the associated galaxy properties. Therefore, we can in principle disentangle the degeneracy among several seeding mechanisms by comparing to the observed SMBHs and host galaxies and investigating their impact especially in terms of observational quantities. Here we present the predictions for the synthetic properties of the galaxies formed at both high and low redshift. In particular, we investigate how the presence of a SMBH appearing as an Active Galactic Nucleus (AGN) correlates with galaxy properties such as star formation rate, stellar mass, metallicity. We discuss the results in terms of mass-metallicity relation and how the impact from the very first stars in the universe can be further investigated. |