Radial diffusion coefficients in the outer heliosphere

Details Radial diffusion coefficients in the outer heliosphere Radial diffusion coefficients in the outer heliosphere

Aug 2001

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2001icrc....9.3674f&link_type=abstract

Proceedings of the 27th International Cosmic Ray Conference. 07-15 August, 2001. Hamburg, Germany. Under the auspices of the Int

Physics

1

Scientific paper

When cosmic ray streaming in the heliosphere is negligible, the basic onedimensional transport model gives a simple approximation for the diffusion coefficient of cosmic ray particles, ~Zrr=CVSW/gr, where C is the Compton-Gettiing factor, VSW is the solar wind velocity and gr is the radial intensity gradients. In a separate paper at this conference we made detailed measurement of radial intensity gradients in the outer heliosphere from the combined data set observed over the solar activity minima of 1977/1997(qA>0). Using these detailed gradients and onedimensional transport model we calculate the diffusion coefficients in the outerheliosphere. These diffusion coefficients are compared with those of 1987 to also search for drift effects as manifested over two successive solar minima periods

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