Top panels: VPD of NGC 1783 based on the PM measurements by Cadelano et al. (2022). The blue circles show the MUSE targets selected as likely cluster’s member stars, while the black circles are the MUSE targets classified as non-members. The smaller panels at the top and on the right show the distributions of both the PM components: the empty histograms represent the entire MUSE sample with the corresponding Gaussian fit indicated by the black curves, while the blue histograms are relative to the bona fide cluster members. Bottom panels: distribution of the RVs of the MUSE sample with S/N > 15. The left panel shows the RVs as a function of the distance from the cluster center. The blue circles highlight the bona fide sample selected according to the criteria discussed in the Section 5, while the black dots are the excluded targets. The empty histogram on the left panel shows the number distribution of the entire RV sample, while the blue histogram corresponds to the final subsample of bona fide stars.