Fig. 4.
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Saturation speed (vs) as a function of the first ionization potential (FIP). The vertical dashed line is 11 eV, the nominal change between high and low FIP. The horizontal, semitransparent blue bar indicates the weighted average of vs = 327 ± 2 km s−1 for elements heavier than He. To within their mutual uncertainties, all but Ne and Si have the same vs.
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