Intergalactic γ-ray propagation: basic ideas, processes, and constraints

We review extragalactic γ-ray propagation models with emphasis on the electromagnetic (EM) cascade process in the magnetized expanding Universe. We consider cascades initiated by primary protons of ultra-high energy accelerated by blazars and show that the observable spectrum is similar to the unive...

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Bibliographic Details
Published in:Journal of physics. Conference series 2019-02, Vol.1181 (1), p.12049
Main Authors: Dzhatdoev, Timur, Khalikov, Emil, Podlesnyi, Egor, Telegina, Anastasia
Format: Article
Language:English
Subjects:
Angular distribution
Argon
Cascades
Constraint modelling
Gamma ray telescopes
Propagation
Radiation counters
Sensitivity
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Summary:We review extragalactic γ-ray propagation models with emphasis on the electromagnetic (EM) cascade process in the magnetized expanding Universe. We consider cascades initiated by primary protons of ultra-high energy accelerated by blazars and show that the observable spectrum is similar to the universal spectrum of a purely EM cascade. We also present a detailed calculation of the observable angular distribution for the case of EM cascades developing from relatively nearby (
ISSN:1742-6588
1742-6596
DOI:10.1088/1742-6596/1181/1/012049