http://arxiv.org/abs/1909.01154
The magnetised solar wind modulates the galactic cosmic ray flux in the heliosphere up to rigidities as high as 40 GeV. In this work, we present a new and straightforward extension of the force-field model that takes into account charge-sign dependent modulation due to drifts in the heliospheric magnetic field. We have validated our semi-analytical approach via comparison to a fully numerical code. Our model nicely reproduces the AMS-02 measurements and we find the strength of diffusion and drifts to be strongly correlated with the heliospheric tilt angle and magnitude of the magnetic field. We are able to predict the electron and positron fluxes beyond the range for which measurements by AMS-02 have been presented. We have made an example script for the semi-analytical model publicly available.
M. Kuhlen and P. Mertsch
Wed, 4 Sep 19
130/146
Comments: 5+5 pages, 2+2 figures; example script available at this https URL
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