Comparison between observed and simulated unfolded RCs. The simulated velocity field shown in panel (c) of Fig. 11 has been used to measure the RC along the major axis of the galaxy; the receding and approaching sides are respectively represented by filled orange and opened cyan stars (⋆) and superimposed onto the GHASP observed and modelled RCs already displayed in panel (c) of Fig. 3, using the same symbols, colours, and lines. The blue vertical lines indicate the position of the effective radius.