PoS - Proceedings of Science
Volume 301 - 35th International Cosmic Ray Conference (ICRC2017) - Session Gamma-Ray Astronomy. GA-extra-galactic
Gamma-ray flares from AGN jets colliding with luminous stars
P. Banasinski,* W. Bednarek, J. Sitarek
*corresponding author
Full text: pdf
Pre-published on: August 16, 2017
Published on: August 03, 2018
Abstract
We consider a model in which gamma-rays in blazars are produced during encounters of relativistic blobs of plasma with radiation field produced by luminous stars within the jet. The blob, formed in the inner part of the jet, already contains relativistic electrons which comptonize stellar radiation to GeV-TeV gamma-ray energies. These gamma-rays can initiate the Inverse Compton electron-positron pair cascade in the radiation field of the star within the jet. Such a scenario might be responsible for the appearance of short time scale gamma-ray flares. The star collision model can explain the appearance of the extreme orphan gamma-ray flare observed in the GeV and sub-TeV energy range from the flat spectrum radio quasar PKS 1222+21.
DOI: https://doi.org/10.22323/1.301.0651
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