HRDs for Aa (left panels) and Ab (right panels) compared to the ZAMS (solid black and gray dashed lines for non-rotating and rotating stars, respectively) and evolutionary tracks calculated by Brott et al. (2011; upper panels) and Ekström et al. (2012; lower panels), respectively. The blue solid lines depict the tracks for non-rotating stars, and the blue dotted lines show tracks for rotating stars. All tracks show the pre-He burning phase. The positions of the components of HD 93129A from our analysis are shown in red.