Testing models of extragalactic \(\gamma\)-ray propagation using observations of extreme blazars in GeV and TeV energy ranges

We briefly review contemporary extragalactic {\gamma}-ray propagation models. It is shown that the Extragalactic Magnetic Field (EGMF) strength and structure are poorly known. Strict lower limits on the EGMF strength in voids are of order 10^{-17}--10^{-20} G, thus allowing a substantial contributio...

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Bibliographic Details
Published inarXiv.org
Main Authors Dzhatdoev, T A, Khalikov, E V, Kircheva, A P, Lyukshin, A A
Format Paper
LanguageEnglish
Published Ithaca Cornell University Library, arXiv.org 24.01.2017
Subjects
Blazars
Cascades
Propagation
Telescopes
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Summary:We briefly review contemporary extragalactic {\gamma}-ray propagation models. It is shown that the Extragalactic Magnetic Field (EGMF) strength and structure are poorly known. Strict lower limits on the EGMF strength in voids are of order 10^{-17}--10^{-20} G, thus allowing a substantial contribution of a secondary component generated by electromagnetic cascades to the observable spectrum. We show that this "electromagnetic cascade model" is supported by data from imaging Cherenkov telescopes and the Fermi LAT detector.
ISSN:2331-8422
DOI:10.48550/arxiv.1701.06827