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).
X $\sigma _{U}$ $\sigma _{V}$ $\sigma _{W}$ $V_{\rm asym}$

------- [km s^-1] -------

Thin disk (D) 0.90 35 20 16 -15

Thick disk ( TD) 0.10 67 38 35 -46

Halo (H) 0.0015 160 90 90 -220

**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).
	X	$\sigma _{U}$	$\sigma _{V}$	$\sigma _{W}$	$V_{\rm asym}$
		------- [km s^-1] -------
Thin disk (D)	0.90	35	20	16	-15
Thick disk ( TD)	0.10	67	38	35	-46
Halo (H)	0.0015	160	90	90	-220

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