Fig. 15

Location of BD−22°3467 in the log Teff – log g diagram compared with other DAO-type WDs taken from Gianninas et al. (2010, all symbols). Three of these (green squares) are used to compare their metal abundances with those of BD−22°3467 (Fig. 16). The post-AGB evolutionary tracks were calculated by Miller Bertolami (priv. comm.) labeled with the stellar mass (in M⊙).
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