Heliosphere Dimension and Cosmic Ray Modulation

Details Heliosphere Dimension and Cosmic Ray Modulation Heliosphere Dimension and Cosmic Ray Modulation

2011-12-24

arxiv.org/abs/1112.5730v1

Astronomy and Astrophysics

Astrophysics

Solar and Stellar Astrophysics

To appear on the Proceedings of the 13th ICATPP Conference on Astroparticle, Particle, Space Physics and Detectors for Physics

Scientific paper

The differential intensities of Cosmic Rays at Earth were calculated using a 2D stochastic Montecarlo diffusion code and compared with observation data. We evaluated the effect of stretched and compressed heliospheres on the Cosmic Ray intensities at the Earth. This was studied introducing a dependence of the diffusion parameter on the heliospherical size. Then, we found that the optimum value of the heliospherical radius better accounting for experimental data. We also found that the obtained values depends on solar activity. Our results are compatible with Voyager observations and with models of heliospherical size modulation.

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