Angular velocity and resonances curves: solid lines show Ω, ILR, and OLR; dotted lines show IUHR and OUHR. Areas filled with gray colour represent error associated with RC. Red points show the average position of each CR. Horizontal lines demonstrate extension of each spiral pattern from it’s inner resonance (ILR or IUHR) to the outer one (OLR). Numbers show ϖ for consecutive patterns. Blue hatched areas mark bar size from Herrera-Endoqui et al. (2015).