We present a combined fit of a simple astrophysical model of UHECR sources to both the energy spectrum and mass composition data measured by the Pierre Auger Observatory. The fit has been performed for energies above 5 EeV, i.e. the region of the all-particle spectrum above the so-called "ankle"' feature. The astrophysical model we adopted consists of identical sources uniformly distributed in a comoving volume, where nuclei are accelerated with a rigidity-dependent mechanism. The fit results suggest sources characterized by relatively low maximum injection energies and hard spectral indices. The impact of various systematic uncertainties on the above result is discussed.
|Original language||English (US)|
|Journal||EPJ Web of Conferences|
|State||Published - Mar 23 2017|
|Event||6th Roma International Conference on Astroparticle Physics, RICAP 2016 - Frascati, Roma, Italy|
Duration: Jun 21 2016 → Jun 24 2016
ASJC Scopus subject areas
- Physics and Astronomy(all)