The Galactic magnetic field and propagation of ultra-high energy cosmic rays

The puzzle of ultra-high energy cosmic rays (UHECRs) still remains unresolved. With the progress in preparation of next generation experiments (AUGER, EUSO, OWL) grows also the importance of directional analysis of existing and fut ure events. The Galactic magnetic field (GMF) plays the key role i n source identification even in this energy range. We first ana lyze current status of our experimental and theoretical knowledge about GMF and introduce complex up-to-date model of GMF. Then we present two examples of simple applications of influe nce of GMF on UHECR propagation. Both examples are based on Lorentz equation solution. The first one is basic directio nal analysis of the incident directions of UHECRs and the second one is a simulation of a change of chemical composition of CRs in the energy range 10 13 ÷10 19 eV. The results of these simple analyses are surprisingly rich — e.g. the rates of particle e scape from the Galaxy or the amplifications of particle flux in specific directions.

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