Astronomy and Astrophysics – Astrophysics
Scientific paper
Jun 1980
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1980a%26a....86...21v&link_type=abstract
Astronomy and Astrophysics, vol. 86, no. 1-2, June 1980, p. 21-31.
Astronomy and Astrophysics
Astrophysics
35
Binary Stars, Mathematical Models, O Stars, Stellar Evolution, Stellar Mass Ejection, Angular Momentum, Mass Ratios, Roche Limit, Stellar Luminosity, Stellar Radiation, Stellar Winds, Tables (Data), Two Body Problem, Wolf-Rayet Stars
Scientific paper
With regard to OB stars, members of close binaries, estimates are made for mass loss rate due to radiation driven stellar winds, the fraction of the expelled mass leaving the system, and the fraction of the lost angular momentum. Observations reveal that massive systems in the post Roche lobe overflow stage are not immediately converted into Wolf-Rayet systems but pass through a new 'normal' OB stage. Furthermore, due to stellar wind mass loss the mass ratio of nonevolved systems will increase; consequently, most of the systems just before Roche lobe overflow (that is, at the end of core hydrogen burning) will have a mass ratio larger than 0.7.
de Loore Camiel
Vanbeveren Dany
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