The acceleration of minor ion species in the solar wind

Details The acceleration of minor ion species in the solar wind The acceleration of minor ion species in the solar wind

Aug 1979

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1979ap%26ss..64..183m&link_type=abstract

Astrophysics and Space Science, vol. 64, no. 1, Aug. 1979, p. 183-211.

Astronomy and Astrophysics

Astrophysics

33

Helium Ions, Magnetohydrodynamic Flow, Particle Acceleration, Solar Wind, Cold Plasmas, Coulomb Potential, Equations Of Motion, Flow Velocity, Gravitational Effects, Ion Motion, Nonuniform Plasmas, Radial Velocity, Solar Protons, Solar Rotation, Solar Wind Velocity, Wave Propagation

Scientific paper

An analysis of the dynamics of the flow of minor ion species in the solar wind under the combined influences of gravity, Coulomb friction, rotational forces, and wave forces is presented. It is assumed that the solar wind can be considered as a proton-electron plasma which is unaffected by minor ions. The non-resonant wave force tends to bring the minor ion flow into an equilibrium where the radial speed matches the Alfven speed relative to the solar wind speed, while Coulomb friction and rotational forces tend to bring the flow into an equilibrium where the radial speed of the minor ions equals the solar wind speed. If the thermal speeds of the protons and minor ions are small compared to the Alfven speed, two stable equilibrium speeds can exist because the rapid decrease in the Coulomb cross-section with increasing differential flow speed allows the non-resonant wave force to balance Coulomb friction at more than one ion speed.

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