Radio and X-Ray Emission in Early Type Galaxies

Abstract

The radio and x-ray emission in nearby early type galaxies are compared. The results indicate that there is a correlation between the x-ray and the radio luminosities, although with a very large scatter. Part of this scatter might be reduced with better radio data (for the x-ray data, we will have to wait a while), but most of it is probably intrinsic to the data, and indicates a rather complex relation between these two quantities. Sources with low radio luminosity could be effectively confined within the optical galaxy by the hot gas radiating in x-rays. For galaxies with L_r > 10²⁹ ergs s^-1Hz^-1 confinement is no longer viable.