A steady three-fluid coronal expansion for nonspherical geometries

Details A steady three-fluid coronal expansion for nonspherical geometries A steady three-fluid coronal expansion for nonspherical geometries

Mar 1978

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1978jgr....83.1019j&link_type=abstract

Journal of Geophysical Research, vol. 83, Mar. 1, 1978, p. 1019-1026.

Other

23

Abundance, Alpha Particles, Flow Geometry, Solar Corona, Solar Corpuscular Radiation, Divergence, Gas Expansion, Solar Atmosphere, Solar Wind, Stellar Models

Scientific paper

The effect of a rapidly diverging flow geometry (characteristic of coronal holes) on the frictional coupling between protons and alphas in the lower corona is studied. The analysis is based on a steady three-fluid model of the solar coronal expansion in which He-4(2+) ions, i.e., alphas, are treated as a nonminor species. It is observed that the process greatly reduces the large He/H abundance ratios predicted near the coronal base by other models. In addition, the frictional drag on the protons exerted by the alphas is a significant factor near the sun. Heavy ions other than alphas manifest varying responses to changing flow geometries depending on ion mass and charge.

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