The Origin of the Highest Energy Cosmic Rays and a Magnetized Local Supercluster

Details The Origin of the Highest Energy Cosmic Rays and a Magnetized Local Supercluster The Origin of the Highest Energy Cosmic Rays and a Magnetized Local Supercluster

Dec 1998

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1998tx19.confe.640o&link_type=abstract

Abstracts of the 19th Texas Symposium on Relativistic Astrophysics and Cosmology, held in Paris, France, Dec. 14-18, 1998. Eds.:

Astronomy and Astrophysics

Astrophysics

Scientific paper

The spectrum of ultra-high energy cosmic rays can be explained by a sufficiently magnetized Local Supercluster. We show that the spectrum of extragalactic cosmic rays with energies below ~1020 eV may be due to the diffusive propagation in the Local Supercluster with fields of ~10^{-8} - 10^{-7} Gauss. Above ~1020 eV, cosmic rays propagate in an almost rectilinear way which is evidenced by the change in shape of the spectrum at the highest energies. The fit to the spectrum requires that at least one source be located relatively nearby at ~10-15 Mpc away from the Milky Way. We discuss the origin of magnetic fields in the Local Supercluster, the constraints from the angular distribution, and plausible acceleration mechanisms related to this model.

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