Evolution tracks of stellar models of SZ Cen. Thick lines denote the primary models. Error bars indicate the uncertainty in R and Teff reported by Torres et al. (2010). The models have 0.013 ≤ fos ≤ 0.028 and −0.25 ≤ [Fe/H] ≤ −0.20. The redder curves show models with lower fos.
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