N. N. Kalmykov, O. P. Shustova, A. V. Uryson
We present spectra and mass composition of cosmic rays incoming to the Earth
in the energy range (0.5-2)10^20 eV. As their sources we consider Seyfert
galaxies located at distances < 40 Mpc, following an acceleration model for
such moderate-power objects. Mass composition of the particles at each source
is assumed to be mixed. Generation spectra are described by a function E^(-g0),
where g0 is an arbitrary parameter. Obtained within these assumptions, our
calculation results are compared with conflicting experimental data provided by
the HiRes and Pierre Auger Observatory collaborations. It is shown that the
most likely sources of ultrahigh-energy cosmic rays are located within a radius
of 40 Mpc.
View original:
http://arxiv.org/abs/1112.5523
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