English

Perplexing correlations between Gamma-ray emission and parsec-scale jet orientation variations in the BL Lac object S5 0716+714

High Energy Astrophysical Phenomena 2015-03-17 v1

Abstract

The analysis of γ\gamma-ray flux variability along with the parsec-scale jet kinematics suggests that the high-energy radiation in the BL Lac object S5 0716+714 has a significant correlation with the mm-VLBI core flux density and with the local orientation of the inner jet flow. For the first time in any blazar, we report a significant correlation between the γ\gamma-ray flux variations and the variations in the local orientation of the jet outflow (position angle). We find that the γ\gamma-ray flux variations lead the 7~mm VLBI core flux variations by 82±\pm32~days, which suggests that the high-energy emission in S5 0716+714 is coming from a region located 3.8±\pm1.9~parsecs closer to the central black hole than the "core" seen on the mm-VLBI images. The results imply a strong physical and casual connection between γ\gamma-ray emission and the inner jet morphology in the source.

Keywords

Cite

@article{arxiv.1503.04219,
  title  = {Perplexing correlations between Gamma-ray emission and parsec-scale jet orientation variations in the BL Lac object S5 0716+714},
  author = {B. Rani and T. P. Krichbaum and A. P. Marscher and S. G. Jorstad and J. A. Hodgson and L. Fuhrmann and J. A. Zensus},
  journal= {arXiv preprint arXiv:1503.04219},
  year   = {2015}
}

Comments

4 pages, 2 figures, proceeding of the 12th European VLBI Network Symposium and Users Meeting - EVN 2014, 7-10 October 2014, Cagliari, Italy