Y2 stellar isochrones from Demarque et al. (2004) for solar metallicity ( [Fe/H] = 0.05, [α/Fe] = 0) and ages of 0.2,0.4,0.6,0.8, and 1 Gyr, from top-left to bottom-right. Left: MV(Teff) isochrones. Right: M(Teff) isochrones. Our estimations for C0121-A, C0121-Ba, and C0121-Bb are marked by a red diamond, a green square, and a blue circle, respectively. The absolute magnitude and mass of C0121-Bb were taken as the average value of the isochrones for a 6500 K star, assuming no error.
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