Mass-loss rates for 21 Wolf-Rayet stars

Details Mass-loss rates for 21 Wolf-Rayet stars Mass-loss rates for 21 Wolf-Rayet stars

Jul 1981

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1981mnras.196..101b&link_type=abstract

Monthly Notices of the Royal Astronomical Society, vol. 196, July 1981, p. 101-110.

Astronomy and Astrophysics

Astronomy

218

Stellar Luminosity, Stellar Mass Ejection, Wolf-Rayet Stars, Bolometers, Error Analysis, Interstellar Matter, Kinetic Energy, Radiation Pressure

Scientific paper

Mass-loss rates have been derived for 21 WR stars encompassing most subtypes in the WN and WC sequences, from measurements of their infrared free-free fluxes. The resultant mass-loss rates show a range of only a factor of 4. WC stars generally have larger mass-loss rates than WN stars, the mean rates being M(WC) = 4.1 x 10 to the -5th solar mass/yr and M(WN) = 2.7 x 10 to the -5th solar mass/yr. Optical and ultraviolet data have been used to estimate bolometric luminosities for a range of WR spectral types, and it is shown that the derived mass loss rates are too large to be powered by radiation pressure. The total kinetic energy injected into the interstellar medium through mass loss during the WR phase of a massive star is estimated to be 7 x 10 to the 50th erg, comparable to that of a supernova event.

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