Princeton University Star Formation/ISM Rendezvous (SFIR)

The interstellar medium and stellar feedback are closely tied to the origin and evolution of galaxies. Low-frequency (<1 GHz) radio recombination lines (RRLs) provide insight into the physical properties and impact of these processes. In this talk I will (i) first focus on the Cygnus X star-forming in our Galaxy, what we glean about diffuse ionized gas and the cold neutral medium, and (ii) how we might establish RRLs as probes of these diffuse media out to high redshift.