Inverse problem for extragalactic transport of ultra-high energy cosmic rays

The energy spectra and composition of ultra-high energy cosmic rays are changing in a course of propagation in the expanding Universe filled with background radiation. We developed a numerical code for solution of inverse problem for cosmic-ray transport equations that allows the determination of av...

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Bibliographic Details
Published in:Journal of cosmology and astroparticle physics 2015-03, Vol.2015 (3), p.54-54
Main Authors: Ptuskin, V.S., Rogovaya, S.I., Zirakashvili, V.N.
Format: Article
Language:English
Subjects:
ASTROPHYSICS, COSMOLOGY AND ASTRONOMY
BACKGROUND RADIATION
COSMIC RADIATION
COSMIC RAY PROPAGATION
ENERGY SPECTRA
INFLATIONARY UNIVERSE
INVERSE SCATTERING PROBLEM
IRON
TELESCOPES
TRANSPORT THEORY
UNIVERSE
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Summary:The energy spectra and composition of ultra-high energy cosmic rays are changing in a course of propagation in the expanding Universe filled with background radiation. We developed a numerical code for solution of inverse problem for cosmic-ray transport equations that allows the determination of average source spectra of different nuclei from the cosmic ray spectra observed at the Earth. Employing this approach, the injection spectra of protons and Iron nuclei in extragalactic sources are found assuming that only these species are accelerated at the source. The data from the Auger experiment and the combined data from the Telescope Array + HiRes experiments are used to illustrate the method.
ISSN:1475-7516
1475-7516
DOI:10.1088/1475-7516/2015/03/054