- Conference date: 17-31 June 2002
- Location: Pisa (Italy)
This paper presents basic issues for the solar wind acceleration with a collisionless model when the base of the wind is sufficiently low for the potential energy of the protons to have a maximum, thereby producing a transsonic wind. Using a formulation in terms of the particle invariants of motion, we study the existence of different categories of ion orbits and the consequences on the wind acceleration. We also study how a suprathermal tail in the electrons velocity distribution enhances the wind acceleration and makes the electron temperature increase within a few solar radii.
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