Speaker
Svetlana Rogovaia
(IZMIRAN)
Description
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 use
a numerical code for solution of inverse problem for cosmic-ray
transport equations that enables the determination of average source
spectra of different nuclei from the cosmic ray spectra observed at the
Earth. The source spectrum is calculated without ad hoc assumptions
about its' shape. The injection spectra of a few groups of nuclei
in extragalactic sources are found. The effects of cosmological
source evolution and the finite distance to the nearest source are
studied. The data from the
Auger experiment and the combined data from the Telescope Array + HiRes
experiments are used to illustrate the method.
| Registration number following "ICRC2015-I/" | 0195 |
|---|---|
| Collaboration | -- not specified -- |
Author
Svetlana Rogovaia
(IZMIRAN)
Co-authors
Dr
Vladimir Ptuskin
(IZMIRAN)
Vladimir Zirakashvili
(IZMIRAN)
