An HR diagram and the time evolution of T_eff, L, log g, R, and Z_surf are shown. Observationally determined  ± 1σ intervals are shown for L, T_eff, g, and R. For T_eff, the spectroscopically determined error bar is in black, while that determined using luminosity and radius is in red (see the text). Each model is color coded and identified in the figure. The adopted acceptable age range is from 200 to 250 Myr (see the text). In the HR diagram, only the part of the curves between 200 and 250 Myr is shown; see Fig. 1 for a more complete figure. All models were calculated with turbulence.

Radiative accelerations after 232 Myr evolution in a model with mass loss of 10^-13   M_⊙/yr (red curves) and in a model with turbulence with ΔM₀ = 1.4  ×  10^-6   M_⊙ (blue curves) for all calculated atomic species. The sharp mimima in the g_rad(Ti), g_rad(Cr), and g_rad(Mn) curves at log ΔM/M_∗ ~  − 10 appear surprising but have been verified to be a systematic property of the OPAL atomic data.

Mass fractions in the models with turbulence (blue curves) and mass loss (red curves). See the caption of Fig. B.1.