PKS 0743-67: An Ultraluminous Accretion Disk and a High Kinetic Luminosity Jet

Abstract

Deep radio observations of the quasar PKS 0743-67 are presented that reveal a central engine capable of driving jets with enormous kinetic luminosity, Q > 4.1 × 1046 ergs s-1. This result is significant because archival optical spectral data indicate that the accretion disk has a thermal luminosity Lbol > 2 × 1047 ergs s-1. Furthermore, estimates of the mass of the central black hole from line widths indicate that Lbol/LEdd ≈ 1. This suggests that neither a large Lbol nor Lbol/LEdd suppresses jet power in quasars, despite claims that they do in the recent literature. Earlier studies have found Lbol and Q to be correlated in blazars. However, by removing the BL Lac objects and leaving only the quasars in the sample, we found that Q is very weakly correlated with Lbol in the subsample.