Map of the stellar positions (top) and position-velocity plots along the Galactic longitude l for the PM along l (second panel), along b (third panel), and along the line of sight (fourth panel). The colour-coding is from the median realisation of the one-population model in Sect. 4.2. Stars with a probability to be a member star higher than 0.5 are shown as an orange circle, and background stars are shown as a black pluses.