Solving the inverse transport problem in intergalactic space and determining the energy spectrum and composition of extragalactic sources of ultrahigh-energy particles

  • V. N. Zirakashvili
  • E. G. Klepach
  • V. S. PtuskinEmail author
  • S. I. Rogovaya
Proceedings of the 34th National Conference on Cosmic Rays


The propagation of ultrahigh-energy nuclei in an expanding Universe filled with background electromagnetic radiation is considered. A numerical method for solving the inverse problem for the equation of cosmic-ray transport is developed that allows the spectrum of sources to be determined from the cosmic-ray spectrum observed near the Earth. The spectra of injected protons and nuclei in extragalactic sources are found by assuming that they are functions of the magnetic rigidity of particles. The data from observations obtained in the Auger experiment are used.


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Copyright information

© Allerton Press, Inc. 2017

Authors and Affiliations

  • V. N. Zirakashvili
    • 1
  • E. G. Klepach
    • 1
  • V. S. Ptuskin
    • 1
    Email author
  • S. I. Rogovaya
    • 1
  1. 1.Pushkov Institute of Terrestrial Magnetism, Ionosphere, and Radio Wave Propagation (IZMIRAN)Russian Academy of SciencesTroitsk, MoscowRussia

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