The black hole-star formation connection over cosmic time
  Observations at low redshift have begun to tease out the star formation rate
in active galaxies (AGN), which marks the beginning of the black hole-star
formation connection over cosmic time. Star formation appears to depend on AGN
type, cluster richness, and black hole accretion, but in ways that are not
direct and have yet to be understood. Much of the confusion is that while some
AGN appear to enhance star formation, others seem to suppress it. By
implementing simplified, yet informed assumptions about AGN feedback on star
formation, we show how AGN with jets might be dominated by two phases in which
star formation is first enhanced, then suppressed. With this new element
incorporated into our model, we make sense of radio and quasar mode behavior in
the star formation rate-stellar mass (SFR-SM) plane for AGN. Due to jet
feedback on star formation, jetted AGN tend to move upwards and rightward in
the SFR-SM plane and then downward and to the right, past both the star-forming
main sequence (SFMS) as well as the radio-quiet AGN. This picture allows us to
predict the black hole connection to star formation as a function of the
environment over the history of the universe.
