All Tables

Table 1: Characteristic velocity dispersions ( $\sigma _{U}$ , $\sigma _{V}$ , and $\sigma _{W}$ ) in the thin disk, thick disk, and stellar halo, used in Eq. (1). X is the observed fraction of stars for the populations in the solar neighbourhood and $V_{\rm asym}$ is the asymmetric drift (values taken from Bensby et al. 2003 and Bensby et al. submitted).
Table 2: Median ages and spreads for the sub-samples. The first column gives the central metallicity, and the second column the $\alpha$ -enhancement. Columns 3-6 give the following for the samples selected with ${\it TD}/D>2$ : the number of stars in the sub-sample, the lower quartile for the age distribution, the median age, and the upper quartile for the age distribution. Columns 7-10 give the same information but for the samples selected with ${\it TD}/D>10$ .