Deposition of Mass, Momentum, and Energy by Massive Stars into the Interstellar Medium

Models for the integrated output of mass, momentum, and energy from a population of massive stars are presented. We computed an extensive grid of radiatively wind models for hot stars and derived scaling relations for the mass-loss rates and wind velocities as a function of stellar parameters, including the metal abundance. It is found that the mass-loss rate scales with metal abundance like M∞Z 0.8 . These wind models are combined with empirical stellar-wind data of other stellar types to obtain predictions for mass-loss rates and wind velocities in the entire upper Hertzsprung-Russell diagram