A fundamental plane of black hole activity: Pushing forward the unification scheme

摘要

We examine the disc-jet connection in stellar mass and supermassive black holes by investigating the properties of their compact emission in the hard X-ray and radio bands. We compile a sample of similar to 100 active galactic nuclei with measured mass, 5 GHz core emission, and 2 - 10 keV luminosity, together with eight galactic black holes with a total of similar to 50 simultaneous observations in the radio and X-ray bands. Using this sample, we study the correlations between the radio (L-R) and the X-ray (L-X) luminosity and the black hole mass (M). We find that the radio luminosity is correlated with both M and L-X, at a highly significant level. We show how this result can be used to extend the standard unification by orientation scheme to encompass unification by mass and accretion rate.