Projected rotational rates of Galactic stars of various properties as a function of logℒ/ℒ_⊙ (=[T_eff ⁴/g]) with vertical lines dividing the objects into four spectral luminosity subgroups as defined in Sect. 5.2. Different symbols are used to highlight the v sin i determinations which do (solid (DWs) and open (SGs) circles) and do not (small dots surrounded by a ring) account for the effect of macro-turbulent broadening (for more information see Sect. 6.2).