Fig. 9
Panels a) and b) like Fig. 5, but for parameters derived with the calibrations of Moon & Dworetsky (1984), later improved by Napiwotzki et al. (1993). Panel c) shows the difference between the [u − b] -based temperature scale proposed by Napiwotzki et al. (1993) and our spectroscopic values. Diamonds indicate stars with Teff ≤ 30 000 K and squares with Teff ≥ 30 000 K.
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