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Berezinskii, V. S.; Grigor'eva, S. I.

Astronomy and Astrophysics (1988), 199(1-2), 1-12 CODEN: AAEJAF; ISSN: 0004-6361. English.

The interaction of ultra-high energy p with the 2.7 K microwave radiation leaves its signature on the differential energy spectrum of p in the form of: pair (e+e-) production bump, pair production dip, .pi. production bump and black body cut off, resp., following each other as energy increases. The phys. interpretation of these features is presented and the method of calculation with the help of calculated energy losses of p in the gas of 2.7 K relic photons is given. The 1-source spectra and many-source (diffuse spectra are calculated for different values of the propagation time. The cosmol. effects, including the growth of energy losses with increasing of red shift, are taken into account. The 1-source spectra at large propagation time distinctly demonstrate all 4 features. The diffuse spectra can have only pronounced .pi. bump and black body cut off. The local supercluster models predict the prominent bump for the wide range of propagation time values.