Variation of various physical parameters of accreting PopIII models. Left panel: luminosity–mass relation depicted for all models. The increase in luminosity at 20 M_⊙ for all models corresponds to the luminosity wave breaking at the surface. Beyond this, luminosity evolves monotonically vs. mass as L ∝ M until the end of accretion history. Right panel: evolution of radius vs. age (in years) for all models. The colours used to represent models correspond to the label shown in the left panel.