Top: change of central V velocities of kinematic structures as a function of Galactocentric radii R. Each dot corresponds to the centre of the structure determined by the wavelet transform in volumes 01, 01a, 00, 21, and 21a. Names of the groups associated with the lines are listed in the legend of Fig. 3. Middle and bottom: example of wavelet maps in the U − V space in regions 01a and 21a. Colour bar shows normalised wavelet coefficients. Black crosses show centres of the detected structures in regions 01a and 21a. Lines show the location of kinematic structures detected in region 00 (see legend of Fig. 3).
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