V_GSR radial velocity histograms in different fields (l,b) (top left). The size of each field is Δl = Δb = 1° for l< 15° and 1.5° otherwise. All stars along each direction were selected. A two-Gaussian model is fitted to the data. The cold kinematic component is in blue and the corresponding mean value, dispersion, and fraction of stars (in percentage) are given at the top right. The mean errors are smaller than 1 km s^-1 for the mean and the dispersion values and smaller than 1% for the fraction of stars.