Origin of the ultra-high-energy cosmic rays

Details Origin of the ultra-high-energy cosmic rays Origin of the ultra-high-energy cosmic rays

Apr 1983

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1983icrc....2..393s&link_type=abstract

Presented at 18th Intern. Cosmic Ray Conf., Bangalore, India, 22 Aug. 1983

Mathematics

Logic

Astronomical Models, Cosmic Rays, Cosmology, Energy Spectra, Mass Distribution, Radiation Spectra, Spectral Energy Distribution

Scientific paper

The nature of the cosmic ray spectrum above 10(19) eV which discriminates between possible primary source models in a limited way is discussed. The shape of the spectrum, apart from normalization, is universal after a few photomeson interaction lengths. Fundamental processes, those sensitive to physics at, e.g., the grand unification scale, are energy efficient and may be necessary to account for the normalization of the spectrum at the GZ cut-off. Very distant cosmological sources of this kind can generate significant structure above 10(19) eV. Local sources are not required and may even be problematic.

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