The Host Galaxies of Radio-Loud AGN

G. Kauffmann

We have cross-correlated the SDSS with the FIRST and NVSS surveys. We use a combination of emission-line and absorption line diagnostics to separate the AGN from the star-forming galaxies. I will discuss how the host galaxies of radio-loud AGN differ from AGN selected according to optical emission lines and comment on the mechanisms that might cause an accreting black hole to become radio loud.