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

Abstract

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 ~100 active galactic nuclei with measured mass, 5 GHz core emission, and 2-10 keV luminosity, together with 8 galactic black holes with a total of about 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.

arXiv comment10 pages, 4 figures. To appear in the proceedings of "From X-ray Binaries to Quasars: Black Hole Accretion on All Mass Scales" (Amsterdam, July 2004). Eds T.Maccarone, R.Fender, L.Ho

References in corpus (14)

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• Mass Functions of Supermassive Black Holes Across Cosmic Time
• Ultra-Luminous X-ray Sources in Haro 11 and the Role of X-ray Binaries in Feedback in Lyman-alpha Emitting Galaxies
• Resolving the Ultra-Luminous X-ray Sources in the Ly$\alpha$ Emitting Galaxy Haro 11
• Multiwavelength study of the bright X-ray source population in the interacting galaxies NGC5774/NGC5775
• Testing the Radio-Selection Method of Dual Active Galactic Nuclei in the Stripe 82 Field