Evolutionary tracks in the HR diagram for stellar masses in the range 20–35 M_⊙ taken from Brott et al. (2011). The vertical lines correspond to the isochrones of 1, 2, 3, 3.6, and 4 Myr (dotted lines) and the ZAMS (solid line). Horizontal lines depict the evolutionary tracks: black solid lines identify values of rotational velocities in the range 53– 61 km s⁻¹ (that is, for the primary). Orange, the same for the secondary (rotation in the range 320–330 km s⁻¹). The points represent the location of the HD 93343 binary components (black for the primary and red for the secondary): filled and empty dots for M_V from Martins et al. (2005) and for M_V estimated from distance modulus calculated in Sect. 5.2, respectively