(V ⊙, U⊙) (left panel) and (V ⊙, W⊙) (right panel) diagrams for PMS-like sources and two lithium-rich giants discussed in the paper. The symbols are as in Fig. 5 and the labels are as in Table 3. The average velocity components (blue asterisks) of some young SKGs and the locus of the YD population (Eggen 1996) are also indicated in the (V ⊙, U⊙) plane. The position of the source #17 (V ⊙ = −2.5 km s−1, U⊙ = 83.5 km s−1) is out of thescale of the plot, as indicated by the red arrow.
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