A sufficiently magnetized local supercluster can explain the spectrum and angular distribution of ultrahigh energy cosmic rays. We show that the spectrum of extragalactic cosmic rays with energies below similar to 10(20) eV may be due to the diffusive propagation in the local supercluster with fields of similar to 10(-8)-10(-7) G. Above, similar to 10(20) 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 similar to 10-15 Mpe away from the Milky Way. We discuss the origin of magnetic fields in the local supercluster and the observable predictions of this model. [S0556-2821(98)08024-2].
Magnetized local supercluster and the origin of the highest energy cosmic rays
Blasi P;
1999-01-01
Abstract
A sufficiently magnetized local supercluster can explain the spectrum and angular distribution of ultrahigh energy cosmic rays. We show that the spectrum of extragalactic cosmic rays with energies below similar to 10(20) eV may be due to the diffusive propagation in the local supercluster with fields of similar to 10(-8)-10(-7) G. Above, similar to 10(20) 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 similar to 10-15 Mpe away from the Milky Way. We discuss the origin of magnetic fields in the local supercluster and the observable predictions of this model. [S0556-2821(98)08024-2].I documenti in IRIS sono protetti da copyright e tutti i diritti sono riservati, salvo diversa indicazione.
