Illustration of the distribution function model. a) The total and the four components of the distribution function shown by the blue curves in Figs. 4f and i. b) The M(v) and T(v) factors of Eq. (3) and the product f(v) = M(v)T(v) for the rising slope of the tail in Figs. 4d and g. The velocity scale is normalised to .
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