Article ID | Journal | Published Year | Pages | File Type |
---|---|---|---|---|
1764532 | Advances in Space Research | 2012 | 7 Pages |
Abstract
In this paper we analyze the spatial distribution of galactic cosmic rays during periods of maximum solar activity of the cycles 21, 22 and 23. We have used a two dimensional model to solve the cosmic ray transport equation. This model includes all relevant physical processes: diffusion, convection, drift and shock effects on cosmic ray propagation inside the heliosphere. We focused on the study of the radial distribution of galactic cosmic rays, and compare our results with the spacecraft observations for two energies (175Â MeV H and 265Â MeV/n He). Although the radial intensities of galactic cosmic rays can be explained qualitatively with all three local interstellar spectra (LISs) used in this work, we applied a reduced chi-squared analysis to investigate the best LIS that could fit the data.
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Authors
O.G. Morales-Olivares, R.A. Caballero-Lopez,