Enormous Hot Blobs from Outer Space: AGN feedback caught in the act?
Carrie Bridge



By combining extensive Keck spectroscopy with the all sky data from NASA's Wide-field Infrared Survey Explorer (WISE), we have discovered a new population of high-redshift galaxy that have many of the features expected of a system near the peak of a short-lived feedback period. Historically, finding systems in this phase has been observationally challenging, but our mid-IR color-selection is remarkably efficient at finding dusty galaxies which demonstrate extended Lyman-alpha emission on spatial scales of 40-100 kpc. These Lyman-alpha 'blobs' differ from their optically selected cousins by having extreme IR luminosities (Hyper-ULIRGs; L_IR>10^13-14). We argue that this population represents a transitional phase in the formation of massive ellipticals. I will present the optical through radio properties of these galaxies, discuss possible mechanisms behind the extended Lyman-alpha emission, and place them in context with other high redshift populations.