The Radial Distribution of Galactic Cosmic Rays in the Heliosphere at Solar Minimum and Solar Maximum

Details The Radial Distribution of Galactic Cosmic Rays in the Heliosphere at Solar Minimum and Solar Maximum The Radial Distribution of Galactic Cosmic Rays in the Heliosphere at Solar Minimum and Solar Maximum

Jul 2003

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2003icrc....7.3965m&link_type=abstract

Proceedings of the 28th International Cosmic Ray Conference. July 31-August 7, 2003. Trukuba, Japan. Under the auspices of the I

Physics

2

Scientific paper

The radial intensity gradients, gr , for the qA>0 solar minimum periods of cycle 20 and 22 for 265 MeV/n galactic cosmic ray (GCR) He and 175 MeV GCR H are very small (<0.2%/AU) between 15 and 72 AU, suggesting that most of the GCR modulation at this time is occurring near the termination shock (T.S.) or in the heliosheath. The GCR latitudinal gradients (gλ ) at this time are also small (<0.0 ± 0.2%/° ). For the qA<0 (1987), gr shows a much stronger radial dependence. The increased modulation from solar minimum to solar maximum is found to occur mainly inside the T.S.. In the inner heliosphere (r<15 AU) there does not appear to be a significant change in the particle transport parameters over the last 3 cycles.

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