Top panel: reproduction of the Δμ_TAN vs. r/R_h diagram of Fe-poor and Fe-rich stars in ω Centauri plotted in Figure 5. Bottom panels: ﹩{\rm{\Delta }}{\mu }_{\alpha }\cos \delta ﹩ and ﹩{\rm{\Delta }}{\mu }_{\delta }﹩ against the position angle θ for stars in regions R₁–R₃ defined in the upper panel. The sine functions that provide the best fit with the observations of Fe-poor and Fe-rich stars are represented with orange and azure lines, respectively.