Radial alpha temperature exponents between 0.3 and 1.0 AU

Details Radial alpha temperature exponents between 0.3 and 1.0 AU Radial alpha temperature exponents between 0.3 and 1.0 AU

Oct 1989

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1989ncimc..12..613g&link_type=abstract

Nuovo Cimento C, Serie 1 (ISSN 0390-5551), vol. 12 C, Sept.-Oct. 1989, p. 613-624.

Physics

1

Alpha Particles, Interplanetary Medium, Particle Energy, Solar Wind Velocity, Proton Energy, Radiation Spectra, Temperature Distribution

Scientific paper

The dynamical characteristics of alpha particles in the solar wind between 0.3 and 1.0 AU are studied. It has been found that the connections between alpha temperature and speed, normalized at 1 AU, as well as radial temperature exponents significantly differ from those found for protons; generally, the alpha temperature depends more strongly on flow speed. Nevertheless, the flow characteristics of alphas and protons concerning their speeds are similar. These findings strongly suggest an additional heating of alphas, for example by Alfven waves or Coulomb collisions.

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