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An estimation of the shape and temporal variation of the solar wind sonic, Alfvénic and fast magnetosonic surfaces

Moussas, X.; Exarhos, G.

In this work we find the shape and dimension of the solar wind transition surfaces, namely the slow (sonic), the fast magnetosonic and the Alfvén surface, as a function of heliospheric latitude using actual experimental data from Ulysses spacecraft during its first pole to pole journey. We also give the temporal variation of the radius of these su…

A thermokinetic study of wave-modulated solar wind electrons using truncated maxwellians

Fahr, H. J.; Chashei, I. V.

Classical kinetic solar wind theories reveal that the solar wind electron distribution function has a delicate influence on the acceleration of the coronal solar wind and its asymptotic velocity. In collisionless kinetics this results from the fact that no hyperbolic electrons with sunward velocities can be expected above the coronal exobase. This…