Advances in mass-loss predictions

J. S. VINK; P. BENAGLIA; B. DAVIES; A. DE KOTER; R. D. OUDMAIJER

Postdam

Workshop; Clumping in hot star winds; 2007

Astrophisik institut fur physik, Universitat Postdam

 We present the results of Monte Carlo mass-loss predictions for massive stars covering a wide range of stellar parameters. We critically test our predictions against a range of observed mass-loss rates -- in light of the recent discussions on wind clumping. We also present a model to compute the clumping-induced polarimetric variability of hot stars and we compare this with observations of Luminous Blue Variables, for which polarimetric variability is larger than for O and Wolf-Rayet stars. Luminous Blue Variables comprise an ideal testbed for studies of wind clumping and wind geometry, as well as for wind strength calculations, and we propose they may be direct supernova progenitors.