Location and origin of gamma-rays in blazars

Abstract

One of the most intriguing and challenging quests of current astrophysics is to understand the physical conditions and processes responsible for production of high-energy particles, and emission of γ-rays. A combination of high-resolution Very Long Baseline Interferometry (VLBI) images with broadband flux variability measurements is a unique way to probe the emission mechanisms at the bases of jets. Our analysis of γ-ray flux variability observed by the Fermi-LAT (Large Area Telescope) along with the parsec-scale jet kinematics suggests that the $\gamma$-ray emission in blazar S5 0716+714 has a significant correlation with the mm-VLBI core flux and the orientation of jet outflow on parsec scales. These results indicate that the inner jet morphology has a tight connection with the observed $\gamma$-ray flares. An overview of our current understanding on high-energy radiation processes, their origin, and location is presented here.

5 pages, 2 figures, to be published in the Journal of Physics: Conference Series

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Cited by in corpus (4)

• Exploring the connection between parsec-scale jet activity and broadband outbursts in 3C 279
• The jet of S5 0716+71 at $\mu$as scales with RadioAstron
• Very Long Baseline Interferometry Observations of the Proposed Radio Counterpart of an EGRET Source
• Multiwavelength picture of the blazar S5 0716+714 during its brightest outburst