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Radiative feedback from luminous, massive stars during their formation is akey process in moderating accretion onto the stellar object. In the priorpapers in this series, we showed that one form such feedback takes is UVline-driven disc ablation. Extending on this study, we now constrain thestrength of this effect in the parameter range of star and disc propertiesappropriate to forming massive stars. Simulations show that ablation ratedepends strongly on stellar parameters, but that this dependence can beparameterized as a nearly constant, fixed enhancement over the wind mass lossrate, allowing us to predict the rate of disc ablation for massive (proto)starsas a function of stellar mass and metallicity. By comparing this to predictedaccretion rates, we conclude that ablation is a strong feedback effect for verymassive (proto)stars which should be considered in future studies of massivestar formation.

monthly notices of the royal astronomical society

Line-driven ablation of circumstellar discs: IV. The role of disc  ablation in massive star formation and its contribution to the stellar upper  mass limit