Fermi/LAT broad emission line blazars

Abstract

We study the broad emission line blazars detected in the gamma-ray band by the Large Area Telescope onboard the Fermi satellite and with the optical spectrum studied by Shaw et al. (2012, 2013). The observed broad line strength provides a measure of the ionizing luminosity of the accretion disk, while the gamma-luminosity is a proxy for the bolometric non-thermal beamed jet emission. The resulting sample, composed by 217 blazars, is the best suited to study the connection between accretion and jet properties. We compare the broad emission line properties of these blazars with those of radio-quiet and radio-loud quasars present in the Sloan Digital Sky Survey, to asses differences and similarities of the disc luminosity and the virial black hole mass. For most sources, we could derive the black hole mass by reproducing the IR-optical-UV data with a standard accretion disc spectrum, and we compared the black hole masses derived with the two methods. The distributions of the masses estimated in the two ways agree satisfactorily. We then apply a simple, one-zone, leptonic model to all the 217 objects of our sample. The knowledge of the black hole mass and disc luminosity helps to constrain the jet parameters. On average they are similar to what found by previous studies of smaller samples of sources.

Accepted for publication in MNRAS. 30 pages, 6 tables, 16 figures. It contains full tables and all SEDs of the sources

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• Proton Synchrotron $\gamma$-rays and the Energy Crisis in Blazars
• SDSS J013127.34-032100.1: a candidate blazar with a 11 billion solar mass black hole at $z$=5.18
• Optical quasi-periodic oscillation of the BL Lacertae object S5 0716+714 during the faint state
• Basic properties of Fermi blazars and the "blazar sequence"
• NuSTAR perspective on high-redshift MeV blazars
• Multiwavelength Study of High-Redshift Blazars
• Gamma-ray observations of low-luminosity active galactic nuclei
• On the magnetisation and the radiative efficiency of BL Lac jets
• Jet efficiencies and black hole spins in jetted quasars
• The sequence of Compton dominance in blazars based on data from WISE and Fermi/LAT
• Optical monitoring of BL Lac object S5 0716+714 and FSRQ 3C273 from 2000 to 2014
• High Energy Gamma-Ray Emission From PKS 1441+25
• The Intrinsic Properties of Multiwavelength Energy Spectra for Fermi Teraelectronvolt Blazars
• The Origin of the Multiwavelength Emission of PKS 0502+049
• Gamma rays from jets interacting with BLR clouds in blazars
• Constraints on the location of $\gamma$-ray emitting region for a sample of blazars with radio core-shift measurements
• Localizing the $\gamma$-ray emitting region in the blazar TXS 2013+370
• The $\gamma$-ray sky seen at X-ray energies I. Searching for the connection between X-rays and $\gamma$-rays in Fermi BL Lac objects
• A NuSTAR view of powerful gamma-ray loud blazars
• Broadband study of OQ 334 during its flaring state
• A flat spectrum candidate for a track-type high energy neutrino emission event, the case of blazar PKS 0723-008
• On the Origin and Evolution of Curvature of the Spectral Energy Distribution of Fermi Bright Blazars
• On radiative acceleration in spine-sheath structured blazar jets
• Probing the disc-jet coupling in S4 0954+65, PKS 0903-57, & 4C +01.02 with $\gamma$-rays
• Correlations between $\gamma$-ray luminosity and magnetization of the jet as well as relativistic electron injection power:cases for Mrk 421, 3C 454.3 and 3C 279
• Origin of multiwavelength emission from flaring high redshift blazar PKS 0537-286
• The physical properties of $\gamma$-ray quiet flat-spectrum radio quasars: why are they undetected by $Fermi$-LAT?
• Long-term hard X-ray variability properties of Swift-BAT blazars
• The Kinetically Dominated Quasar 3C~418
• On estimators of the jet bolometric luminosity of Fermi 2LAC blazars
• Investigating the variability of Swift-BAT blazars with NICER
• Powers and Magnetization of Blazar Jets