Solar wind from a corona with a large helium abundance

Details Solar wind from a corona with a large helium abundance Solar wind from a corona with a large helium abundance

Jun 1992

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1992jgr....97.8183l&link_type=abstract

Journal of Geophysical Research (ISSN 0148-0227), vol. 97, no. A6, June 1, 1992, p. 8183-8201.

Physics

30

Abundance, Helium, Plasma-Particle Interactions, Solar Corona, Solar Flux Density, Solar Wind, Alpha Particles, Proton Flux Density, Solar Protons, Solar Temperature

Scientific paper

The possibility is investigated that the presence of alpha particles in the coronal base region can reduce the sensitivity of the proton mass flux to the base temperature. It is found that for an alpha particle to proton density ratio at the base as small as 10 percent, alpha particles can reduce the sensitivity of the proton mass flux density to variations in the base temperature. The effects of enhanced collisional coupling and of Alfven waves on the flux of protons and alpha particles are studied. As an aid to future observational determination of the alpha particle density in the corona, calculations of the intensities of the resonantly scattered lines He II 304A and H I 1216A for selected models are presented.

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