Position of the 14 program stars in a (T_eff, log(g)) diagram (stars with HVS identifier are black, others are gray). Evolutionary tracks for rotating (Ω/Ω_crit = 0.4) main sequence stars of solar metallicity and different initial masses (Georgy et al. 2013) are overlaid in red. Red filled circles and numbers mark the age in Myr. The locus of the zero-age main sequence (ZAMS) is indicated as a gray dashed line. Error bars indicate 99%-confidence limits and cover statistical and systematic uncertainties.