Kinematic Study of the Blazar S5 0716+714

Abstract

We present the results of a multi-frequency study of the structural evolution of the VLBI jet in the BL Lac object 0716+714 over the last 10 years. We show VLBI images obtained at 5 GHz, 8.4 GHz, 15 GHz and 22 GHz. The milliarcsecond source structure is best described by a one-sided core-dominated jet of ~10 mas length. Embedded jet components move superluminally with speeds ranging from 5 c to 16 c (assuming z=0.3). Such fast superluminal motion is not typical for BL Lac objects, however it is still in the range of jet speeds typically observed in quasars (10 c to 20 c). In 0716+714, younger components, that were ejected more recently, seem to move systematically slower than the older components. This and a systematic position angle variation of the inner (1 mas) portion of the VLBI jet, suggests an at least partly geometric origin of the observed velocity variations. The observed rapid motion and the derived Lorentz factors are discussed with regard to the rapid Intra-Day Variability (IDV) and the gamma-ray observations, from which very high Doppler factors are inferred.

12 pages, 9 figures, accepted for publication in A&A, minor language editing and a reference added in section 1 to match the accepted version; Figs. 3 & 4 are in colors now

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Cited by in corpus (48)

• MOJAVE. X. Parsec-Scale Jet Orientation Variations and Superluminal Motion in AGN
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• Optical Intra-day Variability in Blazars
• Radio to gamma-ray variability study of blazar S5 0716+714
• Erratic Jet Wobbling in the BL Lacertae Object OJ287 Revealed by Sixteen Years of 7mm VLBA Observations
• The Intra-Night Optical Variability of the bright BL Lac object S5 0716+714
• Testing the inverse-Compton catastrophe scenario in the intra-day variable blazar S5 0716+71, III. Rapid and correlated flux density variability from radio to sub-mm bands
• Superluminal non-ballistic jet swing in the quasar NRAO 150 revealed by mm-VLBI
• Multi-wavelength variability properties of Fermi blazar S5 0716+714
• Testing the inverse-Compton catastrophe scenario in the intra-day variable blazar S5 0716+71. I. Simultaneous broadband observations during November 2003
• Location of Gamma-ray emission and magnetic field strengths in OJ 287
• Multiwavelength Intraday Variability of the BL Lac S5 0716+714
• Multifrequency Photo-polarimetric WEBT Observation Campaign on the Blazar S5 0716+714: Source Microvariability and Search for Characteristic Timescales
• Multi-wavelength characterization of the blazar S5~0716+714 during an unprecedented outburst phase
• The Long Term Optical Variability of the BL Lac object S5 0716+714: Evidence for a Precessing Jet
• PKS 1502+106: A high-redshift Fermi blazar at extreme angular resolution. Structural dynamics with VLBI imaging up to 86 GHz
• Jet outflow and gamma-ray emission correlations in S5 0716+714
• Testing the inverse-Compton catastrophe scenario in the intra-day variable blazar S5 0716+71: II. A search for intra-day variability at millimetre wavelengths with the IRAM 30 m telescope
• Connection between inner jet kinematics and broadband flux variability in the BL Lac object S5 0716+714
• Multi-frequency monitoring of gamma-ray loud blazars: I. Light curves and spectral energy distributions
• Long-term variability of extragalactic radio sources in the Planck Early Release Compact Source Catalogue
• Simultaneous MITSuME gRI monitoring of S5 0716+714
• Swift observations of IBL and LBL objects
• Multicolor Optical Monitoring of the Blazar S5 0716+714 from 2017 to 2019
• A Multi-Epoch VLBI Survey of the Kinematics of CJF Sources; Part I: Model-Fit Parameters and Maps
• Space-VLBI Polarimetry of the BL Lac Object S5 0716+714: Rapid Polarization Variability in the VLBI core
• Non-radial motion in the TeV blazar S5 0716+714 The pc-scale kinematics of a BL Lac Object
• Intra-day variability observations of S5 0716+714 over 4.5 years at 4.8 GHz
• Discovery of a Highly Polarized Optical Microflare in the Blazar S5 0716+714 During 2014 WEBT Campaign
• Powerful high energy emission of the remarkable BL Lac object S5 0716+714
• Probing the innermost regions of AGN jets and their magnetic fields with RadioAstron. III. Blazar S5 0716+71 at microarcsecond resolution
• Multifrequency VLBA study of the blazar S5 0716+714 during the active state in 2004 II. Large-scale jet kinematics and the comparison of the different methods of VLBI data imaging as applied to kinematic studies of AGN
• A geometrical interpretation for the properties of multiband optical variability of the blazar S5 0716+714
• Exploring the Variability of the Flat Spectrum Radio Source 1633+382. II: Physical Properties
• The variability of blazars throughout the electromagnetic spectrum
• Multi-frequency VLBA study of the blazar S5 0716+714 during the active state in 2004: I. Inner jet kinematics
• Interferometric Monitoring of Gamma-ray Bright AGNs: S5 0716+714
• Geometrical and Kinematic Parameters of the Jet of the Blazar S5 0716+71 in a Helical-Jet Model
• Optical variability in IBL S5 0716+714 during the 2013-2015 outburst
• A synchrotron self-Compton model with low energy electron cut-off for the blazar S5 0716+714
• Periods of the Long-Term Variability of the Blazar 0716+714 and Their Inter-Correlations in a Helical Jet Model
• Long-term multiband optical variability of S5 0716+714 blazar
• VLBI observations of a flared optical quasar CGRaBS J0809+5341
• Possible Gravitational Microlensing Events in the Optical Lightcurve of Active Galaxy S5 0716+714
• Variability Study and Searching for QPOs with day-like periods in the blazar S5 0716+714 with TESS
• Optical Monitoring and Long-term Optical Spectral Variability of BL Lacertae Object S5 0716+714
• The Atacama Cosmology Telescope: Extragalactic Point Sources in the Southern Surveys at 150, 220 and 280 GHz observed between 2008-2010