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Title: Jet outflow and gamma-ray emission correlations in S5 0716+714

Journal Article · · Astronomy and Astrophysics
 [1];  [1];  [2];  [2];  [1];  [1];  [1]
  1. Max-Planck-Institut fur Radioastronomie (MPIfR) (Germany)
  2. Boston Univ., MA (United States). Institute for Astrophysical Research

Here, using millimeter very long baseline interferometry (VLBI) observations of the BL Lac object S5 0716+714 from August 2008 to September 2013, we investigate variations in the core flux density and orientation of the sub-parsec scale jet, i.e. position angle. The γ-ray data obtained by the Fermi Large Area Telescope are used to investigate the high-energy flux variations over the same time period. For the first time in any blazar, we report a significant correlation between the γ-ray flux variations and the position angle variations in the VLBI jet. The cross-correlation analysis also indicates a positive correlation such that the mm-VLBI core flux density variations are delayed with respect to the γ-ray flux by 82±32 days. This suggests that the high-energy emission is coming from a region located ≥(3.8±1.9) parsecs upstream of the mm-VLBI core (closer to the central black hole). Lastly, these results imply that the observed inner jet morphology has a strong connection with the observed γ-ray flares.

Research Organization:
SLAC National Accelerator Laboratory (SLAC), Menlo Park, CA (United States)
Sponsoring Organization:
USDOE
Contributing Organization:
Fermi-LAT Collaboration
Grant/Contract Number:
AC02-76SF00515
OSTI ID:
1356431
Journal Information:
Astronomy and Astrophysics, Vol. 571; ISSN 0004-6361
Publisher:
EDP SciencesCopyright Statement
Country of Publication:
United States
Language:
English
Citation Metrics:
Cited by: 32 works
Citation information provided by
Web of Science

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Cited By (18)

Multi-wavelength characterization of the blazar S5 0716+714 during an unprecedented outburst phase journal November 2018
The Connection Between the Radio jet and the Gamma-Ray Emission in the Radio Galaxy 3c 120 journal July 2015
Radio and optical intra-day variability observations of five blazars journal May 2017
A connection between γ-ray and parsec-scale radio flares in the blazar 3C 273 journal March 2017
Relativistic Jets from AGN Viewed at Highest Angular Resolution journal December 2019
Multicolor Optical Monitoring of the BL Lacertae Object S5 0716+714 during the 2012 Outburst journal July 2017
Interferometric Monitoring of Gamma-Ray Bright AGNs: S5 0716+714 journal May 2017
Exploring the Connection between Parsec-scale Jet Activity and Broadband Outbursts in 3C 279 journal May 2018
Multi-frequency Variability Study of Ton 599 during the High Activity of 2017 journal January 2019
Multi-wavelength characterization of the blazar S5 0716+714 during an unprecedented outburst phase text January 2018
Radio and optical intra-day variability observations of five blazars text January 2017
Interferometric Monitoring of Gamma-ray Bright AGNs: S5 0716+714 text January 2017
Multi-frequency variability study of Ton 599 during high activity of 2017 text January 2018
Exploring The Magnetic Field Configuration Close To The Central Engines Using GMVA journal July 2016
The Extreme Gamma-Ray Blazar S5 0716+714: Jet Conditions from Radio-Band Variability and Radiative Transfer Modeling preprint January 2015
Perplexing correlations between Gamma-ray emission and parsec-scale jet orientation variations in the BL Lac object S5 0716+714 preprint January 2015
High-resolution polarization imaging of the Fermi blazar 3C 279 preprint January 2018
Radio galaxies - the TeV challenge preprint January 2018