Speaker
Mr
Antonio Condorelli
(Gran Sasso Science Institute)
Description
We present a combined fit of a simple astrophysical model of Ultra-high-energy cosmic rays (UHECRs) sources to both the energy spectrum and mass composition data measured by the Pierre Auger Observatory. 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 has been performed at first for energies above 5 EeV, i.e., the region of the all-particle spectrum above the so-called “ankle” feature, and has then been extended to lower energies in order to include this feature. The fit results and their astrophysical implications in both cases are discussed.
Author
Mr
Antonio Condorelli
(Gran Sasso Science Institute)
