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Fig. 1.


Profiles of different MS stellar parameters against the age of a star for four representative evolutionary tracks computed with the mass of 0.8 and 1 M and [Fe/H] = − 0.4 and 0 (solar metallicity). The top-right plot shows the mass of the convective envelope with the limit of Menv/M  ≈  0.005, as indicated by the dotted red line.

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