ROCKET OBSERVATIONS OF MASS LOSS FROM HOT STARS

Rocket observations have shown that the far-ultraviolet resonance lines have P-Cygni profiles in the spectra of many hot stars, including of and Wolf-Rayet stars and OB supergiants. Velocity shifts as high as-300- km sec-1 have been measured for the short-wavelength edges of some of the lines. Estimates of the rates of mass loss range from 10-8 to 10-6M⊙ year-1. © 1969 D. Reidel Publishing Company.