Evolution tracks of stellar models of χ2 Hya. Thick lines denote the primary models. Error bars indicate the uncertainty in R and Teff reported by Torres et al. (2010). The models in the upper panel have [Fe/H] = −0.15 and 0.00 ≤ fos ≤ 0.03 and those in the lower panel have [Fe/H] = 0.0 and 0.00 ≤ fos ≤ 0.05.
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