Spectra of ultra high energy cosmic rays from astrophysical sources. Overdensity in distribution of luminous matter and extragalactic magnetic fields

Details Spectra of ultra high energy cosmic rays from astrophysical sources. Overdensity in distribution of luminous matter and extragalactic magnetic fields Spectra of ultra high energy cosmic rays from astrophysical sources. Overdensity in distribution of luminous matter and extragalactic magnetic fields

Aug 2004

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2004acag.conf..112b&link_type=abstract

"Gamov memorial international conference dedicated to 100-th anniversary of George Gamov "Astrophysics and cosmology after Gamo

Astronomy and Astrophysics

Astrophysics

Ultra-High Energy Cosmic Rays Propagation Local Supercluster Magnetic Field

Scientific paper

The influence of the extragalactic magnetic field connected with Local Supercluster of galaxies and overdensity in distribution of luminous matter in the local Universe on the energy spectra of ultra-high energy cosmic rays (UHECRs) is considered. The Updated Zwicky Catalogue is proceeded to obtain distribution of galaxies applicable to restoring the distribution of UHECR sources, and compared to data of other catalogues. Analysis of different z-surveys of galaxies (CfA2, PSCz, UZC and recent data of B.Tully) show that we may expect the local (within 40 Mpc) overdensity in UHECR source distribution only of order of 1-5. Such values are not able to solve the problem of disagreement of AGASA data with modeled UHECR spectra from astrophysical sources neither without magnetic field nor in its presence.

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