Selected evolutionary tracks (black solid lines) over-plotted with the corresponding isochrones (green dashed lines) used in this work. Left-hand column panels: tracks with ω_i = 0.0, while right-hand column panels: tracks with ω_i = 0.90. Top row panels: tracks with Z = 0.004 and bottom panel: tracks for Z = 0.01. The tracks cover the mass range from 1.5 to 7 M_⊙. The isochrones are equally spaced in logt and cover the age range from 30 to 980 Myr.