(log T_eff, log L) and (log P, log L) diagrams for stars in ω Cen (points) along with model fits to the diagrams (lines). The point colours are as in Fig. 4 and the abundances used to compute the model lines are shown in the panels at each vertical level. Solid lines are for stars on the RGB and dotted lines are for stars on the AGB. Note that models with abundances given in the bottom panels do not reach the AGB. In the right panels, lines corresponding to the radial fundamental and first-overtone modes are shown.