Transport Parameters in the Heliosphere Inferred from Observed Cosmic Ray Spectra

Details Transport Parameters in the Heliosphere Inferred from Observed Cosmic Ray Spectra Transport Parameters in the Heliosphere Inferred from Observed Cosmic Ray Spectra

Dec 2003

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2003agufmsh11c1119c&link_type=abstract

American Geophysical Union, Fall Meeting 2003, abstract #SH11C-1119

Physics

2114 Energetic Particles, Heliospheric (7514), 7843 Numerical Simulation Studies, 7859 Transport Processes

Scientific paper

This contribution analyzes the cosmic ray (CR) modulation through the heliosphere during the solar minimum conditions for 1977/1997 positive and 1987 negative drift periods. We use a time-dependent two-dimensional model of the transport particle equation, that takes into account all physical processes of the modulation, including the effects of the solar wind termination shock and the heliosheath. The best set of diffusion coefficients that fits the observed CR spectra in the inner as well in the outer heliosphere for both anomalous and galactic CR (H and He), is presented. These parameters are compared with those predicted by scattering and turbulence theories. The implications of our results are discussed.

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