Distributions of the Galactic space velocities and metallicity of the stars from the thick disk (black dotted), hαmr (blue dashed), the thin disk (red solid), and the thick disk + hαmr (green dot-dashed). Gaussian fits of the data are also presented. The mean of Gaussian fits is shown by vertical lines at the top of each distribution. Note that the distributions of different groups were set lower or higher for the sake of clarity.