Free Access
Table 1
Physical parameters used in the different source models.
| Model | x | E max | Comment |
|
|
|||
| MC-high | 2.3 | Z × 1020.5 eV | mixed composition, but dominated by protons up to the highest energies |
| MC-4EeV | 1.4 | Z × 4 1018 eV | Fe-dominated at high energy → agreement with the Pierre Auger Observatory composition trend |
| MC-15EeV | 1.4 | Z × 1.5 1019 eV | no protons, but some CNO and intermediate nuclei injected above 5 × 1019 eV |
| pure-p | 2.6 | 1020.5 eV | only protons at all energies |
| pure-Fe | 2.3 | Z × 1020.5 eV | only Fe nuclei at the source → subdominant but sizable fraction of protons at the highest energies |
Current usage metrics show cumulative count of Article Views (full-text article views including HTML views, PDF and ePub downloads, according to the available data) and Abstracts Views on Vision4Press platform.
Data correspond to usage on the plateform after 2015. The current usage metrics is available 48-96 hours after online publication and is updated daily on week days.
Initial download of the metrics may take a while.