Fig. 8

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Top panel: The sample of 31 fast-rotating stars (blue dots) represented in the HR diagram shows the apparent Teff and log L/L⊙. parameters. Bottom panel: HR diagram for the same sample, assuming PNRC parameters obtained with the classical von Zeipel model. Black dashed lines represent isochrones with 107 and 108 yr; coloured continuum lines represent evolutionary tracks from 2 M/M⊙ up to 20 M/M⊙. The evolutionary tracks and isochrones were calculated by Schaller et al. (1992) supposing static (non-rotating) internal structure equations.
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