Transition region, corona, and solar wind in coronal holes - Some two-fluid models

Physics

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Coronal Holes, Magnetohydrodynamic Waves, Plasma Heating, Solar Wind, Two Fluid Models, Wave Attenuation, Energy Dissipation, Particle Acceleration, Plasma Turbulence, Stellar Models

Scientific paper

A model is presented which treats the heating of the corona and the heating and acceleration of the solar wind as a single process, namely, the turbulent dissipation of solar-generated Alfven waves at the Kolmogorov rate. This model is similar to that described by Hollweg (1986), except that the electron temperature and the proton temperature are allowed to have different values. It is found that, similar to the findings of Hollweg, solutions which yield base pressures in the observed range lead to solar wind flows which are much too slow at 1 AU; a new feature is the appearance of proton temperature peak near 3-4 solar radii. Thus, this model seems to be also unsatisfactory. Several possible resolutions are discussed.

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