Star-formation in active galaxies to z~2: a perspective from Herschel
  studies
  In the era of deep, large-area far-infrared (FIR) surveys from the Herschel
Space Telescope, the bulk of the star-formation in distant galaxies, once
hidden by dust, is now being revealed. The FIR provides probably the cleanest
view of SF in the host galaxies of Active Galactic Nuclei (AGNs) over cosmic
time. We report results from studies of the relationships between SF, AGN
activity and AGN obscuration out to z=2.5, which employ some of the deepest
Herschel and X-ray datasets currently available, while spanning orders of
magnitude in the dynamic range of AGN properties. We highlight the role of
gaseous supply in modulating both SF and AGN activity without necessarily
implying a direct causal connection between these phenomenon. The role of
starburst- or major merger-fueled AGN activity at low and high redshifts is
discussed in the context of our results.
