Signatures of AGN induced metal loss in the stellar population
  One way the AGN are expected to influence the evolution of their host
galaxies is by removing metal content via outflows. In this article we present
results that show that AGN can have an effect on the chemical enrichment of
their host galaxies using the fossil record technique on CALIFA galaxies. We
classified the chemical enrichment histories of all galaxies in our sample
regarding whether they show a drop in the value of their metallicity. We find
that galaxies currently hosting an AGN are more likely to show this drop in
their metal content compared to the quiescent sample. Once we separate the
sample by their star-forming status we find that star-forming galaxies are less
likely to have a drop in metallicity but have deeper decreases when these
appear. This behavior could be evidence for the influence of either pristine
gas inflows or galactic outflows triggered by starbursts, both of which can
produce a drop in metallicity.
