Nick Seymour (CASS)

Projet HeRGÉ: Coeval Bulge and Black Hole Growth in Powerful High Redshift Radio Galaxies -- Nick Seymour Colloquium

ATNF Marsfield Lecture Theatre

Abstract

Across cosmic time, powerful radio sources are robust beacons of the most massive galaxies in the Universe. Hence, they trace the co-formation of the massive galaxies and their central black holes as well as the collapse of the most massive dark matter halos. I shall present results from a comprehensive Spitzer/infrared imaging of a sample of 70 high redshift radio galaxies (L3GHz>10^26 W/Hz, 1 <z <5.2). We use these data to determine stellar masses of the host galaxies, AGN mid-IR luminosities and compare these to radio and sub-mm properties. We shall also present early results from an extension of this project to longer wavelengths with Herschel which allows more accurate separation of AGN and starburst components as well as a more accurate estimate of the star formation rate.