Powerful quasar-feedback in local and very distant (U)LIRGs
by
Claudia cicone(Cavendish Laboratory, University of Cambridge, UK)
→
Europe/Rome
Description
ABSTRACT: Understanding the negative feedback mechanisms responsible for regulating and quenching star formation in galaxies, represents a crucial step in solving some of the major open problems in galaxy formation and evolutionary models. In particular, "quasar-mode" negative feedback is often invoked by these models to prevent massive galaxies from overgrowing and to account for the "red-and-dead" properties of massive local and high redshift (z ~ 2) galaxies. The recent discovery of powerful and large-scale outflows of molecular gas in several local (U)LIRGs constitutes a major breakthrough in this field. I will present our latest study (Cicone et al. 2014a) in which we exploit CO(1-0) interferometric observations to make a significant step forward in understanding the properties of massive molecular outflows, their connection with the central AGN and with the ongoing starburst and their profound feedback on the host galaxy. I will also show new exciting results on the quasar-feedback mechanisms in action in the very early Universe, presenting recent interferometric follow-up observations of the extremely massive and extended quasar-driven outflow detected in a quasar-host HyLIRG at redshift z=6.4 using the [CII]158 $\mu$m emission line (Maiolino et al. 2012, Cicone et al. 2014b).
