Feedback: The basic questions are where, when, how, how much and how do we observationally determine it.
- When does AGN feedback occur: at high z, low z, at all redshifts. Is the amount of feedback a function of cosmic time/galaxy mass/star formation rate.
- In which galaxies is feedback occurring and what are the parameters of the host galaxy that are correlated with feedback. Can we actually measure the direct effect of feedback on star formation.
- Where in the galaxy are the signatures of feedback found- in the nucleus, in the outer regions, in the halo.
- Are the signatures of feedback different in spirals, ellipticals, rapidly star forming galaxies?
- What is the physical mechanism(s) via which the AGN inhibits, stimulates or modifies star formation?
- Are the observed AGN winds related to feedback and if so, how
- What future observations are necessary to answer these questions?