Speaker
Mr
Armando di Matteo
(INFN and University of L'Aquila)
Description
We present a combined fit of both flux and composition of ultra-high energy cosmic rays as measured by the Pierre Auger Observatory. The fit has been performed for energies above $5{\times}10^{18}$ eV, the region of the all-particle spectrum above the so-called ``ankle'' feature. A simple astrophysical model has been adopted, consisting of identical sources, injecting nuclei with a rigidity dependent mechanism and uniformly distributed in a comoving volume. The solutions that have been found suggest a source model characterized by relatively low maximum injection energies and hard spectral indices. The impact of different sources of systematic uncertainties in the above result is discussed.
| Registration number following "ICRC2015-I/" | 237 |
|---|---|
| Collaboration | Pierre Auger |
Author
Mr
Armando di Matteo
(INFN and University of L'Aquila)
