Title:  Understanding the Role of Quasar Feedback with Red Quasars

Abstract: Quasars are actively growing supermassive black holes at the centers of distant galaxies. Their brightness outshines all the stars in their hosts, allowing us to study them and the universe to is earliest times. Quasar activity also regulates how galaxies and their nuclear supermassive black holes grow and co-evolve. In this talk, I will present a population of highly luminous dust-reddened quasars that may be the key to understanding this co-evolution. Red quasars are among the most intrinsically-luminous quasars in the Universe representing a short-lived phase in the lifetime of a quasar, during which their energy output (feedback) irrevocably impacts their host galaxy. Recent evidence has also shown that red quasars have enhanced radio emission, possibly linking the formation of jets to the merger phenomenon or exposing a different form of feedback in these systems, such as dusty radiation-driven winds. Red quasars are thus ideal laboratories for addressing fundamental questions on the co-evolution of black holes and their host galaxies as well as the physics of feedback. I will present findings from several surveys that are uncovering this elusive population of quasars using various selection methods across the electromagnetic spectrum to probe a broad range of redshift and luminosity regimes.