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Extragalactic UHE proton spectrum and prediction for iron-nuclei flux at 10–10 GeV |
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| Authors: | VS Berezinsky SI Grigorieva BI Hnatyk |
| Institution: | aINFN, Laboratori Nazionali del Gran Sasso, I-67010 Assergi (AQ), Italy bInstitute for Nuclear Research, 60th October Revolution prospect 7A, 117312 Moscow, Russia cAstronomical Observatory of Kiev National University, 3 Observatorna street, 04053 Kiev, Ukraine |
| Abstract: | We investigate the problem of transition from galactic cosmic rays to extragalactic ultra-high energy cosmic rays. Using the model for extragalactic ultra-high energy cosmic rays and observed all-particle cosmic ray spectrum, we calculate the galactic spectrum of iron nuclei in the energy range 108–109 GeV. The flux and spectrum predicted at lower energies agree well with the KASCADE data. The transition from galactic to extragalactic cosmic rays is distinctly seen in spectra of protons and iron nuclei, when they are measured separately. The shape of the predicted iron spectrum agrees with the Hall diffusion. |
| Keywords: | Cosmic rays Ultra-high energy cosmic rays Knee |
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