Identification of Sources of Ultrahigh Energy Cosmic Rays

Details Identification of Sources of Ultrahigh Energy Cosmic Rays Identification of Sources of Ultrahigh Energy Cosmic Rays

Aug 2001

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2001arep...45..591u&link_type=abstract

Astronomy Reports, Volume 45, Issue 8, August 2001, pp.591-599

Astronomy and Astrophysics

Astronomy

2

Scientific paper

The arrival directions of extensive air showers with energies 4×10193σ (σ is the parameter of Gaussian distribution). The Seyfert galaxies are characterized by moderate luminosities (L<1046 erg/s) and weak radio and X-ray emission. We also analyzed gamma-ray emission at energies E>1014 eV recorded by the Bolivian and Tian Shan arrays. The source identifications suggest that the gamma rays could have been produced in interactions of cosmic rays with the microwave background radiation and subsequent electromagnetic cascades in intergalactic space. We estimate the strength of intergalactic magnetic fields outside galaxy clusters to be B≤8.7×10-10 G.

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