3D heliospheric simulations of cosmic rays in the light of Ulysses.

Details 3D heliospheric simulations of cosmic rays in the light of Ulysses. 3D heliospheric simulations of cosmic rays in the light of Ulysses.

Dec 1996

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1996ncimc..19..921j&link_type=abstract

Nuovo Cimento C, Vol. 19C, N. 6, p. 921 - 926

Physics

Cosmic Rays: Heliosphere, Cosmic Rays: Propagation

Scientific paper

Recent Ulysses observations in the polar regions of the heliosphere have provided fundamental new insights into the modes of cosmic-ray transport in the heliosphere. Ulysses discovered variations in the magnetic field which are large enough to produce significant cosmic-ray effects, and which are consistent with a previous prediction. In addition to impeding the inward, radial diffusive and drift access of cosmic rays over the poles as discussed previously, the magnetic fluctuations imply a significantly larger latitudinal diffusion. These effects directly lead to both a much reduced latitudinal gradient and significant 27-day time variations near the pole. The authors conclude that the general picture of cosmic-ray transport and modulation developed over the past decade, with reasonable parameters, can account for most of the observed global, large-scale phenomena.

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