Abstract

We re-examine the interaction of ultra high energy nuclei with the microwave background radiation. We find that the giant dipole resonance leaves a new signature in the differential energy spectrum of iron sources located around 3 Mpc: A depression before the bump which is followed by the expected cutoff.

Notes

Originally posted at http://arxiv.org/abs/astro-ph/9708082v2. Preprint of an article published in Physical Review D, v.57 no.12, 1998.

Keywords

ultra high energy nuclei, microwave background radiation

Subject Categories

Cosmic rays, Astrophysics, Cosmic background radiation

Disciplines

Physics

Publication Date

1998

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