Kinematics of Parsec-Scale Jets of Gamma-Ray Blazars at 43~GHz within the VLBA-BU-BLAZAR Program

Abstract

We analyze the parsec-scale jet kinematics from 2007 June to 2013 January of a sample of $\gamma$-ray bright blazars monitored roughly monthly with the Very Long Baseline Array at 43~GHz. In a total of 1929 images, we measure apparent speeds of 252 emission knots in 21 quasars, 12 BL~Lacertae objects (BLLacs), and 3 radio galaxies, ranging from 0.02$c$ to 78$c$; 21\% of the knots are quasi-stationary. Approximately 1/3 of the moving knots execute non-ballistic motions, with the quasars exhibiting acceleration along the jet within 5~pc (projected) of the core, and knots in the BLLacs tending to decelerate near the core. Using apparent speeds of components and timescales of variability from their light curves, we derive physical parameters of 120 superluminal knots, including variability Doppler factors, Lorentz factors, and viewing angles. We estimate the half-opening angle of each jet based on the projected opening angle and scatter of intrinsic viewing angles of knots. We determine characteristic values of physical parameters for each jet and AGN class based on the range of values obtained for individual features. We calculate intrinsic brightness temperatures of the cores, $T_{\mathrm{b},\mathrm{int}}^{\mathrm{core}}$, at all epochs, finding that the radio galaxies usually maintain equipartition conditions in the cores, while $\sim$30\% of $T_{\mathrm{b},\mathrm{int}}^{\mathrm{core}}$ measurements in the quasars and BLLacs deviate from equipartition values by a factor $>$10. This probably occurs during transient events connected with active states. In the Appendix we briefly describe the behavior of each blazar during the period analyzed.

arXiv comment48 pages, 18 figures, Tables 2,3,5, & 7 in a full length and figures 2 and 4 for each source can be found in the journal version of the paper

References in corpus (103)

• Unified Schemes for Radio-Loud Active Galactic Nuclei
• Fermi Large Area Telescope Second Source Catalog
• Fermi Large Area Telescope First Source Catalog
• A theoretical unifying scheme for gamma-ray bright blazars
• Polarimetric Observations of 15 Active Galactic Nuclei at High Frequencies: Jet Kinematics from Bimonthly Monitoring with the Very Long Baseline Array
• MOJAVE: Monitoring of Jets in Active Galactic Nuclei with VLBA Experiments. VI. Kinematics Analysis of a Complete Sample of Blazar Jets
• Probing the Inner Jet of the Quasar PKS 1510-089 with Multi-waveband Monitoring during Strong Gamma-ray Activity
• MOJAVE. X. Parsec-Scale Jet Orientation Variations and Superluminal Motion in AGN
• Doppler factors, Lorentz factors and viewing angles for quasars, BL Lacertae objects and radio galaxies
• Sub-milliarcsecond Imaging of Quasars and Active Galactic Nuclei III. Kinematics of Parsec-Scale Radio Jets
• Multi-Epoch VLBA Observations of EGRET-Detected Quasars and BL Lac Objects: Superluminal Motion of Gamma-Ray Bright Blazars
• Sub-milliarcsecond Imaging of Quasars and Active Galactic Nuclei. IV. Fine Scale Structure
• MAGIC discovery of VHE Emission from the FSRQ PKS 1222+21
• Fermi-LAT Observations of Markarian 421: the Missing Piece of its Spectral Energy Distribution
• MOJAVE XIII. Parsec-Scale AGN Jet Kinematics Analysis Based on 19 years of VLBA Observations at 15 GHz
• Jet opening angles and gamma-ray brightness of AGN
• Relativistic beaming and gamma-ray brightness of blazars
• Simultaneous Planck, Swift, and Fermi observations of X-ray and gamma-ray selected blazars
• Flaring Behavior of the Quasar 3C~454.3 across the Electromagnetic Spectrum
• Fermi Gamma-ray Space Telescope Observations of the Gamma-ray Outburst from 3C 454.3 in November 2010
• Efficiency of Magnetic to Kinetic Energy Conversion in a Monopole Magnetosphere
• Location of gamma-ray Flare Emission in the Jet of the BL Lacertae Object OJ287 more than 14pc from the Central Engine
• From the Blazar Sequence to the Blazar Envelope: Revisiting the Relativistic Jet Dichotomy in Radio-loud AGN
• The structure and emission model of the relativistic jet in the quasar 3C 279 inferred from radio to high-energy gamma-ray observations in 2008-2010
• Constraining the location of the emitting region in Fermi blazars through rapid gamma-ray variability
• A Tight Connection between Gamma-Ray Outbursts and Parsec-Scale Jet Activity in the Quasar 3C 454.3
• Correlated Multi-Waveband Variability in the Blazar 3C~279 from 1996 to 2007
• On the relation between AGN gamma-ray emission and parsec-scale radio jets
• Multi-Epoch VLBA Observations of EGRET-Detected Quasars and BL Lac Objects: Connection between Superluminal Ejections and Gamma-Ray Flares in Blazars
• Detection of significant cm to sub-mm band radio and gamma-ray correlated variability in Fermi bright blazars
• Time-correlation between the radio and gamma-ray activity in blazars and the production site of the gamma-ray emission
• Jet stability and the generation of superluminal and stationary components
• MOJAVE: Monitoring of Jets in Active Galactic Nuclei with VLBA Experiments. XI. Spectral distributions
• The Jets of TeV Blazars at Higher Resolution: 43 GHz and Polarimetric VLBA Observations from 2005-2009
• Results of WEBT, VLBA and RXTE monitoring of 3C 279 during 2006-2007
• Parsec-Scale Blazar Monitoring: Proper Motions
• Probing the innermost regions of AGN jets and their magnetic fields with RadioAstron. I. Imaging BL Lacertae at 21 microarcsecond resolution
• Unprecedented study of the broadband emission of Mrk 421 during flaring activity in March 2010
• The Outburst of the Blazar S5 0716+71 in 2011 October: Shock in a Helical Jet
• On the Location of the Gamma-ray Emission in the 2008 Outburst in the BL Lacertae Object AO 0235+164 through Observations across the Electromagnetic Spectrum
• VHE gamma-ray emission of PKS 2155-304: spectral and temporal variability
• A supermassive binary black hole in the quasar 3C345
• Fermi Large Area Telescope and multi-wavelength observations of the flaring activity of PKS 1510-089 between 2008 September and 2009 June
• Disk-Jet Connection in the Radio Galaxy 3C 120
• MOJAVE: Monitoring of Jets in AGN with VLBA Experiments. VII. Blazar Jet Acceleration
• Intrinsic Brightness Temperatures of AGN Jets
• Central Regions of Barred Galaxies: Two-Dimensional Non-self-gravitating Hydrodynamic Simulations
• Connection between the Accretion Disk and Jet in the Radio Galaxy 3C 111
• A Connection Between Apparent VLBA Jet Speeds and Initial Active Galactic Nucleus Detections Made by the Fermi Gamma-ray Observatory
• MOJAVE XII: Acceleration and Collimation of Blazar Jets on Parsec Scales
• Constraining the Location of Gamma-Ray Flares in Luminous Blazars
• A new activity phase of the blazar 3C 454.3. Multifrequency observations by the WEBT and XMM-Newton in 2007-2008
• MAGIC gamma-ray and multifrequency observations of flat spectrum radio quasar PKS 1510-089 in early 2012
• RadioAstron Observations of the Quasar 3C273: a Challenge to the Brightness Temperature Limit
• Erratic Jet Wobbling in the BL Lacertae Object OJ287 Revealed by Sixteen Years of 7mm VLBA Observations
• The brightest gamma-ray flaring blazar in the sky: AGILE and multi-wavelength observations of 3C 454.3 during November 2010
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• Multiwavelength Variations of 3C 454.3 during the November 2010 to January 2011 Outburst
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• Radio and gamma-ray follow-up of the exceptionally high activity state of PKS 1510-089 in 2011
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• Relativistic Beaming and Flux Variability in Active Galactic Nuclei
• Detection of multiple velocity components in partially overlapping emitting regions
• Multi-frequency VLBA study of the blazar S5 0716+714 during the active state in 2004: I. Inner jet kinematics

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