The Mystery of the GZK cutoff in the light of the galaxy distribution

Details The Mystery of the GZK cutoff in the light of the galaxy distribution The Mystery of the GZK cutoff in the light of the galaxy distribution

Aug 2001

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2001icrc....5.1764c&link_type=abstract

Proceedings of the 27th International Cosmic Ray Conference. 07-15 August, 2001. Hamburg, Germany. Under the auspices of the Int

Physics

1

Scientific paper

The Ultra High Energy Cosmic Rays are a long standing puzzle. Up to now, their origin remains unknown as well as the explanation of the absence of GZK cutoff observed in all the experiments. In this paper we analyze the possible absence of GZK cutoff in the light of galaxies surveys. We find that the overdensity in our neighbourhood deduced from the UZC survey couldn't reproduce the absence of cutoff in the cosmic rays spectra. The basic new element of this work is a detail treatment with the correct luminosity function. In addition we find an estimate of the density number of dwarf galaxies in order of 0.43 Mpc-3 .

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