Location and origin of gamma-rays in blazars

14th International Conference on Topics in Astroparticle and Underground Physics

物理学;天文学

Rani, B.^1 ; Krichbaum, T.P.^1 ; Hodgson, J.A.^1 ; Zensus, J.A.^1

Max-Planck-Institut für Radioastronomie (MPIfR), Auf dem Hügel 69, Bonn

D-53121, Germany^1

关键词: Broadband fluxes;    Emission mechanism;    Gamma-ray emission;    High energy radiation;    High-energy particles;    Large area telescopes;    Physical conditions;    Very long baseline interferometry;   

Others  :  https://iopscience.iop.org/article/10.1088/1742-6596/718/5/052032/pdf
DOI  :  10.1088/1742-6596/718/5/052032

学科分类：天文学(综合)

来源: IOP

【 摘 要 】

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 γ-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 γ-ray flares. An overview of our current understanding on high-energy radiation processes, their origin, and location is presented here.