The VHE anomaly in blazar spectra and related phenomena

The VHE anomaly in blazar spectra and related phenomena

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Most of the recent research on extragalactic γ-ray propagation focused on the study of the γγ * e+e− absorption process (“absorption-only model”). Starting from a possible anomaly at very high energies (VHE, E > 100 GeV), we briefly review several existing deviations from this model. The exotic i...

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Main Authors: Dzhatdoev Timur, Khalikov Emil, Kircheva Anna, Lyukshin Alexander
Format: Article
Language:English
Published: EDP Sciences 2017-01-01
Series:EPJ Web of Conferences
Online Access:https://doi.org/10.1051/epjconf/201614517002
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spelling doaj-62ce4a6d155740d4a8ed323e536476d22021-08-02T14:37:18ZengEDP SciencesEPJ Web of Conferences2100-014X2017-01-011451700210.1051/epjconf/201614517002epjconf-isvhecri2016_17002The VHE anomaly in blazar spectra and related phenomenaDzhatdoev Timur0Khalikov Emil1Kircheva Anna2Lyukshin Alexander3Federal State Budget Educational Institution of Higher Education M.V. Lomonosov Moscow State University, Skobeltsyn Institute of Nuclear Physics (SINP MSU)Federal State Budget Educational Institution of Higher Education M.V. Lomonosov Moscow State University, Skobeltsyn Institute of Nuclear Physics (SINP MSU)Federal State Budget Educational Institution of Higher Education M.V. Lomonosov Moscow State University, Department of PhysicsFederal State Budget Educational Institution of Higher Education M.V. Lomonosov Moscow State University, Department of PhysicsMost of the recent research on extragalactic γ-ray propagation focused on the study of the γγ * e+e− absorption process (“absorption-only model”). Starting from a possible anomaly at very high energies (VHE, E > 100 GeV), we briefly review several existing deviations from this model. The exotic interpretation of the VHE anomaly is not supported by the recent works. On the other hand, the process of intergalactic electromagnetic cascade development naturally explains these effects. We discuss phenomenology of intergalactic cascades and the main spectral signatures of the electromagnetic cascade model. We also briefly consider the hadronic cascade model; it also may explain the data, but requires low strength of magnetic field around the source of primary protons or nuclei.https://doi.org/10.1051/epjconf/201614517002
collection DOAJ
language English
format Article
sources DOAJ
author Dzhatdoev Timur
Khalikov Emil
Kircheva Anna
Lyukshin Alexander
spellingShingle Dzhatdoev Timur
Khalikov Emil
Kircheva Anna
Lyukshin Alexander
The VHE anomaly in blazar spectra and related phenomena
EPJ Web of Conferences
author_facet Dzhatdoev Timur
Khalikov Emil
Kircheva Anna
Lyukshin Alexander
author_sort Dzhatdoev Timur
title The VHE anomaly in blazar spectra and related phenomena
title_short The VHE anomaly in blazar spectra and related phenomena
title_full The VHE anomaly in blazar spectra and related phenomena
title_fullStr The VHE anomaly in blazar spectra and related phenomena
title_full_unstemmed The VHE anomaly in blazar spectra and related phenomena
title_sort vhe anomaly in blazar spectra and related phenomena
publisher EDP Sciences
series EPJ Web of Conferences
issn 2100-014X
publishDate 2017-01-01
description Most of the recent research on extragalactic γ-ray propagation focused on the study of the γγ * e+e− absorption process (“absorption-only model”). Starting from a possible anomaly at very high energies (VHE, E > 100 GeV), we briefly review several existing deviations from this model. The exotic interpretation of the VHE anomaly is not supported by the recent works. On the other hand, the process of intergalactic electromagnetic cascade development naturally explains these effects. We discuss phenomenology of intergalactic cascades and the main spectral signatures of the electromagnetic cascade model. We also briefly consider the hadronic cascade model; it also may explain the data, but requires low strength of magnetic field around the source of primary protons or nuclei.
url https://doi.org/10.1051/epjconf/201614517002
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