The AGN Population in the LSST Era

Roberto Assef, Universidad Diego Portales

Many methods of AGN identification exist today, relying on a variety of
wavelengths and indicators. However they typically have significant biases
that affect our understanding of the general population of AGN and its
role in the grand scheme of galaxy evolution. For this talk I will focus
on how LSST will allow us to push the boundaries of which AGN can be
identified and studied. Selection based on variability will allow us to
probe type 1 AGN whose colors are degenerate with those of other objects,
as well as lower Eddington ratio objects were the host galaxy dilutes the
AGN emission. The stacked images of LSST will allow us to identify AGN at
much fainter optical fluxes, and could also have a major impact in our
census of obscured AGN identified at other wavelengths, allowing us to
study their host galaxies and determine precise photometric redshifts up
to high z. This data could also have significant impact in the study of
the environments of the most luminous quasars. These studies will be
greatly enhanced by co-eval surveys such as Euclid and eROSITA.