Velocity dispersion of the metal-rich and metal-poor populations (Table 2), as well as of several samples of evolved stars towards the PG3 field: AGB stars from Uttenthaler et al. (2007, U07), Miras and SRVs from Schultheis (1998) without and with selection using a period – K-magnitude relation, and PNe from Durand et al. (1998). The grey shaded areas mark the range of uncertainty of the metal-rich and metal-poor population, respectively.