Geomagnetic effects on cosmic ray propagation under different conditions for Buenos Aires and Marambio, Argentina

MASÍAS-MEZA, J.J.; DASSO, S.

Sun and Geosphere

Balkan, Black Sea and Caspian Sea Regional Network on Space Weather Studies

Año: 2014 vol. 9 p. 41 - 47

1819-0839

The geomagnetic field (Bgeo) sets a lower cutoff rigidity (RC) to the entry of cosmic particles to Earth which depends on the geomagnetic activity. From numerical simulations of the trajectory of a proton using different models for Bgeo (performed with the MAGCOS code), we use backtracking to analyze particles arriving at the location of two nodes ofthe net LAGO (Large Aperture Gamma ray burst Observatory) that will be built in the near future: Buenos Aires and Marambio (Antarctica), Argentina. We determine the asymptotic trajectories and the values of RC for different incidence directions, for each node. Simulations were done using several models for Bgeo that emulate different geomagneticconditions. The presented results will help to make analysis of future observations of the flux of cosmic rays done at these two LAGO nodes