Median orbital radius of the bins in the velocity plane of simulations in a Galactic potential with a bar. Left panel: contours every 0.25 kpc in the range of [6,10.5] kpc. Middle panel: same as the left one but shows the contours of the wavelet transform (white contours), which indicate the main over-densities in the velocity plane, and the green contours that mark the regions where the median orbital radius is significantly different with a 95% confidence from its symmetric v_R region. Right panel: differences in the median orbital radius (depicted in the left and middle panels) for particles with positive and negative v_R. The green contours are the same as for the middle panel.