Zobrazeno 1 - 10
of 12
pro vyhledávání: '"E V Khalikov"'
Autor:
Timur Dzhatdoev, E. V. Khalikov
Publikováno v:
Monthly Notices of the Royal Astronomical Society. 505:1940-1953
Ultrahigh energy protons and nuclei from extragalactic cosmic ray sources initiate intergalactic electromagnetic cascades, resulting in observable fluxes of $\gamma$-rays in the GeV-TeV energy domain. The total spectrum of such cascade $\gamma$-rays
Blazars may accelerate protons and/or nuclei as well as electrons. The hadronic component of accelerated particles in blazars may constitute the bulk of their high-energy budget; nevertheless, this component is elusive due to a high value of the ener
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::755c0e9a06d7b1fe08658e8348b74bd6
http://arxiv.org/abs/2111.07389
http://arxiv.org/abs/2111.07389
Publikováno v:
Physics of Particles and Nuclei. 49:90-93
Methods of searching for oscillations of photons to axion-like particles (γ → ALP) in spectra of extragalactic sources are considered. It is shown that the secondary component from the cascades initiated by primary gamma rays or nuclei can produce
Publikováno v:
Bulletin of the Russian Academy of Sciences: Physics. 81:443-445
There are indications that a secondary component of cascade photons is present in the spectra of some bright blazars. The main spectral signatures are considered using the electromagnetic model. The simplest version of the hadronic cascade model can
We review extragalactic $\gamma$-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
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::0b41728b28af3c7466905aa66a52e7d5
http://arxiv.org/abs/1810.06200
http://arxiv.org/abs/1810.06200
Intergalactic electromagnetic cascades in the magnetized Universe as a tool of astroparticle physics
Publikováno v:
EPJ Web of Conferences, Vol 191, p 08009 (2018)
We review the physics of intergalactic electromagnetic cascades in the presence of the extragalactic magnetic field (EGMF). Various regimes of intergalactic electromagnetic cascades are considered depending on the number of cascade generations, the v
Publikováno v:
Proceedings of 35th International Cosmic Ray Conference — PoS(ICRC2017).
Observations of extragalactic sources in the high energy (HE, E>100 MeV) and very high energy (VHE, E>100 GeV) domains allow to search for axion-like particles (ALP) and constrain the extragalactic magnetic field (EGMF) parameters. Such studies have
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}--1
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::2074780148d3cf02425f91e178010752
http://arxiv.org/abs/1701.06827
http://arxiv.org/abs/1701.06827
Context. Most of the studies on extragalactic {\gamma}-ray propagation performed up to now only accounted for primary gamma-ray absorption and adiabatic losses ("absorption-only model"). However, there is growing evidence that this model is oversimpl
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::74c34881bdb519173190f32f4a3da177
http://arxiv.org/abs/1609.01013
http://arxiv.org/abs/1609.01013
Publikováno v:
EPJ Web of Conferences, Vol 145, p 17002 (2017)
Most of the recent research on extragalactic $\gamma$-ray propagation focused on the study of the $\gamma\gamma \rightarrow e^{+}e^{-}$ absorption process ("absorption-only model"). Starting from a possible anomaly at very high energies (VHE, E >100