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

Rani, B.; Krichbaum, T. P.; Marscher, A. P.; Jorstad, S. G.; Hodgson, J. A.; Fuhrmann, L.; Zensus, J. A.

doi:10.1051/0004-6361/201424796

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

Journal Article · Thu Nov 06 00:00:00 EST 2014 · Astronomy and Astrophysics

DOI:https://doi.org/10.1051/0004-6361/201424796· OSTI ID:1356431

Rani, B. ^[1]; Krichbaum, T. P. ^[1]; Marscher, A. P. ^[2]; Jorstad, S. G. ^[2]; Hodgson, J. A. ^[1]; Fuhrmann, L. ^[1]; Zensus, J. A. ^[1]

Max-Planck-Institut fur Radioastronomie (MPIfR) (Germany)
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.

View Accepted Manuscript (DOE)

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, Journal Name: Astronomy and Astrophysics Vol. 571; ISSN 0004-6361

Publisher:: EDP SciencesCopyright Statement

Country of Publication:: United States

Language:: English

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