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Ultrahigh energy heavy nuclei propagation in extragalactic magnetic fields

Gianfranco Bertone1, Claudia Isola1,2, Martin Lemoine1, and Günter Sigl1

  • 1GReCO, Institut d’Astrophysique de Paris, C.N.R.S., 98 bis boulevard Arago, F-75014 Paris, France
  • 2Centre de Physique Théorique, Ecole Polytechnique, 91128 Palaiseau Cedex, France

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Phys. Rev. D 66, 103003 – Published 26 November, 2002

DOI: https://doi.org/10.1103/PhysRevD.66.103003

Abstract

We extend existing work on the propagation of ultrahigh energy cosmic rays in extragalactic magnetic fields to a possible component of heavy nuclei, taking into account photodisintegration, pion production, and the creation of e± pairs. We focus on the influence of the magnetic field on the spectrum and chemical composition of observed ultrahigh energy cosmic rays. We apply our simulations to the scenarios proposed by Anchordoqui et al., in which iron nuclei are accelerated in nearby starburst galaxies, and show that it is in marginal agreement with the data. We also show that it is highly unlikely to detect He nuclei from M87 at the highest energies observed ∼3×1020eV as required for the scenario of Ahn et al. in which the highest energy cosmic rays originate from M87 and are deflected in a Parker spiral galactic magnetic field.

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Phys. Rev. D 66, 103003– Published 26 November, 2002
  • Received 5 August 2002

© 2002 American Physical Society

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