Upper plot: difference between effective temperatures from Adibekyan et al. (2012) and those derived from the V − K indices and calibration from Casagrande et al. (2010) for the whole sample. The lower curve is the mean of the difference calculated over 75 points, the upper curve is the dispersion. Lower plot: difference in age resulting from the two scales, as a function of age (based on Adibekyan et al. (2012) spectroscopic scale) for stars with “good” ages (see text).
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