Astronomy and Astrophysics – Astrophysics
Scientific paper
2001-03-02
Phys.Rev.Lett. 87 (2001) 081101
Astronomy and Astrophysics
Astrophysics
Version to appear in Physical Review Letters, contains additional discussion suggested by referees
Scientific paper
10.1103/PhysRevLett.87.081101
If, as recently proposed by Farrar and Piran, Cen A is the source of cosmic rays detected above the Greisen-Zatsepin-Kuz'min cutoff, neutrons are $\approx 140$ more probable than protons to be observed along its line of sight. This is because the proton flux is rendered nearly isotropic by ${\cal O}(\mu$G) intergalactic magnetic fields. With the anticipated aperture of the Southern Auger Observatory, one may expect on the order of 2 neutron events/year above $10^{20}$ eV in the line of sight of Cen A.
Anchordoqui Luis A.
Goldberg Haim
Weiler Thomas J.
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