High-Energy Cosmic Rays from Radio Galaxies. (arXiv:1812.09475v1 [astro-ph.HE])
<a href="http://arxiv.org/find/astro-ph/1/au:+Eichmann_B/0/1/0/all/0/1">Björn Eichmann</a>
A detailed investigation of radio galaxies has recently stressed these
sources as the possible origin of the cosmic rays observed above
$3,text{EeV}$. Here, the relevance of this model at energies below
$3,text{EeV}$ is investigated. So, it is shown that the average contribution
of radio galaxies can accurately explain the observed CR flux between the
second knee and the ankle in the case of a strong source evolution. However,
the model cannot provide the increasing heaviness and variance at energies
$lesssim 1,text{EeV}$ of the observed chemical composition. In addition, it
is exposed that the resulting variance of the chemical composition at Earth
shows also at higher energies a clear disagreement with the observations,
indicating that the compositional contributions by Centaurus A and Cygnus A
need to be less different.
A detailed investigation of radio galaxies has recently stressed these
sources as the possible origin of the cosmic rays observed above
$3,text{EeV}$. Here, the relevance of this model at energies below
$3,text{EeV}$ is investigated. So, it is shown that the average contribution
of radio galaxies can accurately explain the observed CR flux between the
second knee and the ankle in the case of a strong source evolution. However,
the model cannot provide the increasing heaviness and variance at energies
$lesssim 1,text{EeV}$ of the observed chemical composition. In addition, it
is exposed that the resulting variance of the chemical composition at Earth
shows also at higher energies a clear disagreement with the observations,
indicating that the compositional contributions by Centaurus A and Cygnus A
need to be less different.
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