Invited Presentation

Observing cosmological evolution of quasars and the host galaxies

Author(s): Yoshiki Matsuoka (Ehime University)

Presenter: Yoshiki Matsuoka (Ehime University)

Quasars have been recognized as a key population in decoding the rich and complex process of galaxy evolution. It is becoming clear that the assemblies of galaxies and supermassive black holes (SMBH) are intimately linked, as hinted by, e.g., the observed tight correlation between the masses of the two populations. This link may at least partly be established during the quasar phase; star formation and SMBH growth are both fueled by abundant gas supply, which may eventually be removed by feedback processes. It is thus important to understand where in the universe quasars are found, and how abundant they are at different stages of cosmic history. This talk will be a short review of the recent progress in observations of quasars and their host galaxies (biased to my personal interest). In particular, I will put emphasis on optical/near-IR surveys, that have pushed out the frontiers of quasar evolution in the cosmological context.