Physics
Scientific paper
Dec 2005
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2005agufmsh23b0342b&link_type=abstract
American Geophysical Union, Fall Meeting 2005, abstract #SH23B-0342
Physics
2104 Cosmic Rays, 2114 Energetic Particles (7514), 2134 Interplanetary Magnetic Fields
Scientific paper
We apply the stochastic method of Zhang (1999) for solving galactic cosmic ray modulation to a Fisk type heliosphere configuration. We use primarily the same field and parameters as in Burger and Hitge (2004), although with several noteable differences. First, we limit our study to protons. We calculate the drift, or anti-symmetric diffusion coefficient, explicitly for this new field. We also include a spherical termination shock, and we do not limit the size of our heliosphere, as we set our outer boundary well beyond this termination shock (in this case 100 AU). We find that the initial spectra and latitudinal gradients agree well with those in the above work. Initial estimates of amplitude versus latitudinal gradient indicate that the average amplitude deviations are similar to those indicated in the above study for a 5 degree current sheet tilt. This is despite the differences in our parameters, such as diffusion coefficient and our larger boundary values.
Ball Bryan M.
Zhang Minghui
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