On the determination of source spectrum of ultra high energy cosmic rays

24th European Cosmic Ray Symposium

Ptuskin, V.^1 ; Rogovaya, S.^1 ; Zirakashvili, V.^1

IZMIRAN, Troitsk, Moscow

142190, Russia^1

关键词: Background radiation;    Iron nuclei;    Solution of inverse problems;    Source spectrum;    Transport equation;    Ultra high-energy cosmic rays;    Ultra-high energies;   

Others  :  https://iopscience.iop.org/article/10.1088/1742-6596/632/1/012101/pdf
DOI  :  10.1088/1742-6596/632/1/012101

来源: IOP

【 摘 要 】

The calculations of source spectra of extragalactic cosmic rays with ultra high energies are made based on the solution of inverse problem for a system of transport equations that describes the propagation of protons and nuclei with energies 1018to 1021eV in the expanding Universe filled with the background radiation. It is assumed that protons and Iron nuclei are the most abundant species in the sources. The data from the Auger experiment is used to illustrate the method.