The influence of the anomalous cosmic-ray component on the dynamics of the solar wind

Details The influence of the anomalous cosmic-ray component on the dynamics of the solar wind The influence of the anomalous cosmic-ray component on the dynamics of the solar wind

Feb 1992

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1992soph..137..355f&link_type=abstract

Solar Physics (ISSN 0038-0938), vol. 137, Feb. 1992, p. 355-383. Research supported by DFG and Polish Academy of Sciences.

Physics

30

Cosmic Rays, Heliosphere, Magnetohydrodynamic Flow, Plasma-Particle Interactions, Solar Wind Velocity, Magnetohydrodynamic Turbulence, Pressure Gradients, Shock Waves, Two Fluid Models

Scientific paper

A theoretical study on the interaction of the solar wind solely with the anomalous cosmic-ray component (ACR) is presented. The standard two-fluid model in which the cosmic-ray fluid modifies the solar wind flow via the cosmic-ray pressure gradient is used. Numerical solutions are derived by calculating an aspherical pressure distribution for the anomalous cosmic rays, describing their diffusion in an unperturbed radial solar wind, and then considering the perturbation of the solar wind flow due to these induced (ACR) pressure gradients. Emphasis is placed on the action of a nonspherical geometry of the heliospheric shock which may lead to pronounced upwind-downwind asymmetries in the pressures and thereby in the resulting solar wind flows. The wind deceleration rate due to the ACR component is in the range of 5-11 percent. The influences of the ACR and the Galactic cosmic rays are comparable as far as the magnitudes of the solar wind deceleration are concerned.

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