Difference between the observed V_LSR and the expected V_LSR (ΔV_LSR) as a function of the metallicity [Fe/H], for the full sample of Cepheid candidates. The different markers indicate stars classified as CCs (blue circles), T2Cs (red squares), and low T_eff for a Cepheid (gray diamonds). See the text for details about the five stars represented with open symbols. The horizontal red dashed lines indicate velocity differences of ΔV_LSR = ±30 km s⁻¹ and the black one ΔV_LSR = 0 km s⁻¹. The vertical black dashed line is [Fe/H] = −0.6 dex and the ±0.1 dex region is indicated with the vertical red dashed lines. There is a clear difference between CCs and T2Cs. Also included as a reference are the observed V_LSR on the y-axis (small points, connected with black lines to their ΔV_LSR values). For the stars classified as CCs the dispersion around ΔV_LSR = 0 km s⁻¹ decreases, thus compatible with having disk-like kinematics; instead, T2Cs show large ΔV_LSR.