Influence of abundances on mass-loss determination for WC stars

Details Influence of abundances on mass-loss determination for WC stars Influence of abundances on mass-loss determination for WC stars

Nov 1986

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1986a%26a...168..111v&link_type=abstract

Astronomy and Astrophysics (ISSN 0004-6361), vol. 168, no. 1-2, Nov. 1986, p. 111-117.

Statistics

Computation

84

Computational Astrophysics, Mass Flow Rate, Stellar Composition, Stellar Mass Ejection, Wolf-Rayet Stars, Abundance, Carbon, Free Electrons, Oxygen, Stellar Atmospheres, Stellar Winds

Scientific paper

The authors discuss the influence of significant abundances of carbon and oxygen on the number of free electrons in the outer layers of Population I Wolf-Rayet stars of the WC sequence and hence on their mass loss rates derived from radio measurements. The revised mass loss rates of the higher ionization subtypes are about two times larger than previously estimated when almost pure helium atmospheres had been assumed; whereas those of the lower ionization subtypes, i.e. the WC7 to WC9 stars, are about two to three times the previous estimates, because for these types also ionization effects become important. The impact of WR stellar winds on their interstellar environment is correspondingly increased; as is the difficulty of driving WR stellar winds by radiation pressure alone.

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