General Physical Properties of CGRaBS Blazars

We present the results of a multi-frequency, time-averaged analysis of blazars included in the Candidate Gamma-ray Blazar Survey catalog. Our sample consists of 324 gamma-ray detected (gamma-ray loud) and 191 gamma-ray undetected (gamma-ray quiet) blazars; we consider all the data up to 2016 April 1. We find that both the gamma-ray loud. and gamma-ray quiet. blazar populations occupy similar regions in the WISE color-color diagram, and gamma-ray loud. sources are brighter in the radio and X-ray bands. A simple one-zone synchrotron inverse-Compton emission model is applied to derive the physical properties of both populations. We find that the central black hole mass and accretion disk luminosity (L-disk) computed from the modeling of the optical-UV emission with a Shakura-Sunyaev disk reasonably matches that estimated from the optical spectroscopic emission-line information. A significantly larger Doppler boosting in the gamma-ray loud. blazars is noted, and their jets are more radiatively efficient. On the other hand, the gamma-ray quiet. objects are more MeV-peaked and thus could be potential targets for next-generation MeV missions. Our results confirm earlier findings about the accretion-jet connection in blazars; however, many of the.-ray quiet. blazars tend to deviate from the recent claim that the jet power exceeds L-disk in blazars. A broadband study, considering a larger set of gamma-ray quiet. objects and also including BL Lacs, will be needed to confirm/reject this hypothesis as well as to verify the evolution of the powerful high-redshift blazars into their low-power nearby counterparts.