Mass-weighted ages as a function of the velocity dispersion σ for BC03 models (symbols are colour-coded as in Fig. 10). Filled circles are the mass-weighted ages corresponding to z< 0.1, matching the redshifts analyzed by McDermid et al. (2015), with black curves linking the mass-weighted ages related to different mass bins but similar redshifts. The grey curve is the age – σ relation inferred by McDermid et al. (2015) with its dispersion (grey shaded region), while the light-blue curve is the Thomas et al. (2010) relation (its dispersion, not shown in the figure, is in the order of 60%).
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