your ID: 0244 
First Name: Yi 
Last Name: Liu 
Affiliation: Shanghai Astronomical Observatory Chinese Academy of Sciences 
Title: The Jet Power, Radio Loudness, and Black Hole Mass in Radio-loud Active Galactic Nuclei 
Authors: Liu, Yi; Jiang, Dong Rong; Gu, Min Feng 
Topic: 2 
Session: oral 
Abstract: Jet formation is thought to be closely connected with the mass 
of the central supermassive black hole in active galactic nuclei. The radio
 luminosity commonly used in investigating this issue is merely an indirect
 measure of the energy transported through the jets from the central engine 
and is severely Doppler boosted in core-dominated radio quasars. In this 
work, we investigate the relationship between the jet power and the black 
hole mass, by estimating the jet power using extrapolated extended 151 MHz
 flux density from the VLA 5 GHz extended radio emission, for a sample of 
146 radio-loud quasars compiled from the literature. After removing the effect
 of relativistic beaming in the radio and optical emission, we find a significant
 intrinsic correlation between the jet power and the black hole mass. It strongly
 implies that the jet power, like jet formation, is closely connected with the black 
hole mass. To eliminate the beaming effect in the conventional radio loudness, 
we define a new radio loudness as the ratio of the radio extended luminosity to 
the optical luminosity estimated from the broad-line luminosity. In a tentatively 
combined sample of radio-quiet with our radio-loud quasars, the apparent gap
 around the conventional radio loudness R=10 is not prominent for the new-defined 
radio loudness. In this combined sample, we find a significant correlation between 
the black hole mass and new-defined radio loudness.