Characteristics of Gamma-Ray Loud Blazars in the VLBA Imaging and Polarimetry Survey

Abstract

The radio properties of blazars detected by the Large Area Telescope (LAT) on board the Fermi Gamma-ray Space Telescope have been observed as part of the VLBA Imaging and Polarimetry Survey (VIPS). This large, flux-limited sample of active galactic nuclei (AGN) provides insights into the mechanism that produces strong gamma-ray emission. At lower flux levels, radio flux density does not directly correlate with gamma-ray flux. We find that the LAT-detected BL Lacs tend to be similar to the non-LAT BL Lacs, but that the LAT-detected FSRQs are often significantly different from the non-LAT FSRQs. The differences between the gamma-ray loud and quiet FSRQs can be explained by Doppler boosting; these objects appear to require larger Doppler factors than those of the BL Lacs. It is possible that the gamma-ray loud FSRQs are fundamentally different from the gamma-ray quiet FSRQs. Strong polarization at the base of the jet appears to be a signature for gamma-ray loud AGN.

32 pages, 9 figures, accepted by ApJ

References in corpus (14)

• Five-Year Wilkinson Microwave Anisotropy Probe (WMAP) Observations: Data Processing, Sky Maps, and Basic Results
• Probing the Inner Jet of the Quasar PKS 1510-089 with Multi-waveband Monitoring during Strong Gamma-ray Activity
• Bright AGN Source List from the First Three Months of the Fermi Large Area Telescope All-Sky Survey
• Fast variability of TeV gamma-rays from the radio galaxy M 87
• CGRaBS: An All-Sky Survey of Gamma-Ray Blazar Candidates
• The VLBA Imaging and Polarimetry Survey at 5 GHz
• On the relation between AGN gamma-ray emission and parsec-scale radio jets
• On the Evolution of and High-Energy Emission from GHz-Peaked-Spectrum Sources
• Radio/gamma-ray time delay in the parsec-scale cores of active galactic nuclei
• TANAMI: Tracking Active Galactic Nuclei with Austral Milliarcsecond Interferometry I. First-Epoch 8.4 GHz Images
• Characteristics of EGRET Blazars in the VLBA Imaging and Polarimetry Survey (VIPS)
• Discovery of an Extreme MeV Blazar with the Swift Burst Alert Telescope
• The Relation between Radio Polarization and Gamma-ray Emission in AGN Jets
• The Connection between Radio and Gamma-ray Emission in Active Galactic Nuclei

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• Gamma-Ray and Parsec-Scale Jet Properties of a Complete Sample of Blazars From the MOJAVE Program
• Connecting radio variability to the characteristics of gamma-ray blazars
• The connection between gamma-ray emission and millimeter flares in Fermi/LAT blazars
• Optical spectroscopic observations of gamma-ray blazars candidates I: preliminary results
• Compact Symmetric Objects and Supermassive Binary Black Holes in the VLBA Imaging and Polarimetry Survey
• Contemporaneous VLBA 5 GHz Observations of LAT-Detected Blazars
• Intra-night optical variability of core dominated radio quasars: the role of optical polarization
• Precise absolute astrometry from the VLBA imaging and polarimetry survey at 5 GHz
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• Basic properties of Fermi blazars and the "blazar sequence"
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• The Radio/Gamma Connection of Blazars from High to Low Radio Frequencies
• Why are some BL Lacs detected by \fermi, but others not ?
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• Gamma-ray Loudness, Synchrotron Peak Frequency, and Parsec-Scale Properties of Blazars Detected by the Fermi Large Area Telescope
• The beaming effect and $\gamma$-ray emission for Fermi blazars
• TANAMI - Multiwavelength and Multimessenger Observations of Active Galaxies
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• Multiwavelength flaring activity of PKS1510-089
• Incidence of Mg II absorption systems towards flat-spectrum radio quasars
• The radio structure of ultra-high-energy synchrotron peak BL Lacs
• The Connection between Radio and Gamma Ray Emission in Fermi/LAT Blazars
• Megaparsec-scale Radio Structure Associated with a Hybrid Blazar SBS B1646+499: Episodic Jet Activity with Precessing Axis
• The importance of jet bending in gamma-ray AGN - revisited
• The core dominance parameter and \emph{Fermi} detection of extragalactic radio sources
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• High-resolution monitoring of parsec-scale jets in the Fermi era