Geomagnetic effects on cosmic ray propagation for different conditions

MASÍAS-MEZA, J.J. ; BERTOU, X.; DASSO, S.

Comparative Magnetic Minima: characterizing quiet times in the Sun and stars

Cambridge University Press

Año: 2012; p. 234 - 237

The geomagnetic field (Bg eo ) sets a lower cutoff rigidity (Rc) to the entry of cosmicparticles to Earth which depends on the geomagnetic activity. From numerical simulations ofthe trajectory of a proton (performed with the MAGCOS code) in the Bg eo , we use backtrackingto analyze particles arriving at the Auger Observatory location. We determine the asymptotictrajectories and the values of Rc in different incidence directions. Simulations were done usingseveral models of Bg eo that emulate different geomagnetic conditions.