Effects of drift on the transport of cosmic rays. VI - A three-dimensional model including diffusion

Details Effects of drift on the transport of cosmic rays. VI - A three-dimensional model including diffusion Effects of drift on the transport of cosmic rays. VI - A three-dimensional model including diffusion

Feb 1983

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1983apj...265..573k&link_type=abstract

Astrophysical Journal, Part 1, vol. 265, Feb. 1, 1983, p. 573-581.

Other

258

Astronomical Models, Cosmic Rays, Interplanetary Medium, Particle Diffusion, Solar Wind, Three Dimensional Models, Computerized Simulation, Convection, Current Sheets, Drift, Energy Dissipation, Energy Spectra, Galactic Radiation, Particle Acceleration

Scientific paper

The first results are presented from a series of computer simulations of the solar modulation of galactic cosmic rays using a full three-dimensional model which incorporates all known important effects on particle transport, particle drifts, convection with the solar wind, energy loss, and anisotropic diffusion. The model is time-independent in the coordinate frame rotating with the sun, so corotating effects can be studied. Modulation in an interplanetary magnetic field model is considered in which the current sheet separating the northern and southern solar hemispheres is warped and corotating with the sun. The amplitude of the warp is varied to simulate possible solar cycle variation of the magnetic field. Substantial effects due to the warp of the current sheet are found. Comparison of the model results with various data is presented. Among other things, it is shown that the intensity may decrease away from the current sheet for both signs of the magnetic field, as suggested by recent observations, and in contrast with inferences from earlier, more approximate calculations.

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