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

Journal Article · Sun Mar 01 00:00:00 EST 2015 · Journal of Cosmology and Astroparticle Physics

DOI:https://doi.org/10.1088/1475-7516/2015/03/054· OSTI ID:22525917

Ptuskin, V. S.; Rogovaya, S. I.

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.

• OSTI ID: 22525917
• Journal Information: Journal of Cosmology and Astroparticle Physics, Vol. 2015, Issue 03; Other Information: Country of input: International Atomic Energy Agency (IAEA); ISSN 1475-7516
• Country of Publication: United States
• Language: English

Related Subjects

79 ASTROPHYSICS
COSMOLOGY AND ASTRONOMY
BACKGROUND RADIATION
COSMIC RADIATION
COSMIC RAY PROPAGATION
ENERGY SPECTRA
INFLATIONARY UNIVERSE
INVERSE SCATTERING PROBLEM
IRON
TELESCOPES
TRANSPORT THEORY
UNIVERSE