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Fig. 4

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Theoretical isochrones for solar composition (X = 0.70, Y = 0.28, Z = 0.02) assuming overshooting adopted from Claret (2004). Positions of all three components of δ Velorum are shown. Thick solid lines correspond to masses 1.5 M, 2 M, and 2.5 M. Luminosities of Aa and Ab correspond to the combined solution, while for component B the luminosity was derived from the Hipparcos distance and observed visual magnitude. Horizontal error bars for the components of the eclipsing pair correspond to the surface temperature ranges due to the gravity brightening.

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