Astrophys. J., 851, 33-33 (2017/December-2)
General physical properties of CGRaBS blazars.
PALIYA V.S., MARCOTULLI L., AJELLO M., JOSHI M., SAHAYANATHAN S., RAO A.R. and HARTMANN D.
Abstract (from CDS):
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 γ-ray detected (γ-ray loud) and 191 γ-ray undetected (γ-ray quiet) blazars; we consider all the data up to 2016 April 1. We find that both the γ-ray loud and γ-ray quiet blazar populations occupy similar regions in the WISE color-color diagram, and γ-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 (Ldisk) 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 γ-ray loud blazars is noted, and their jets are more radiatively efficient. On the other hand, the γ-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 γ-ray quiet blazars tend to deviate from the recent claim that the jet power exceeds Ldisk in blazars. A broadband study, considering a larger set of γ-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.
© 2017. The American Astronomical Society. All rights reserved.
galaxies: active - galaxies: jets - gamma rays: galaxies - quasars: general - quasars: general
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<Available at CDS (J/ApJ/851/33): table2.dat table3.dat table5.dat table6.dat table7.dat table8.dat>
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