Age residuals (ASP − AGCS11) between the mean age value delivered by SPInS (ASP) and the expected (i.e. also mean) age (AGCS11) given in the GCS11 (Casagrande et al. 2011). The horizontal grey line shows the locus of equal ages and the dashed lines are for ages differing by ±25 per cent. The colours distinguish stars according to their metallicity. Left figure: 5040 stars with good ages as defined by Casagrande et al. (see text), with no filtering of the parallax error. Right figure: 10 865 stars with determined ages, all stars having a parallax error lower than 10 per cent.
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