Jet/accretion and Unification for FSRQs/FRII and BL Lac objects/FRI radio galaxies

摘要

We compiled a sample of 24 flat-spectrum radio quasars (FSRQs), 21 BL Lacs,13 FRI and 12 FRII radio galaxies to study the jet power and broad-lineluminosity relation, and the jet power and black hole mass relation.Furthermore, we obtain the histograms of key parameters. Our main results areas the follows:(i) We found that the FSRQs are roughly separated from BL Lacsby the Ledlow-Owen FRI/FRII dividing line in the $\rm{\log{P_{jet}}-\log{M}}$plane. This result supports the unification model that BL Lacs unify with FRIradio galaxies and FSRQs unify with FRII radio galaxies.(ii)We found that thecoefficient of the best-fit linear regression equation of$\rm{\log{L_{BLR}}-\log{P_{jet}}}$ relation is very close to 1 for our sample.The correlation between broad line luminosity and jet power is significantwhich supports that jet power has a close link with accretion.