Astronomy and Astrophysics – Astronomy
Scientific paper
Dec 1987
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1987mnras.229..529h&link_type=abstract
Monthly Notices of the Royal Astronomical Society (ISSN 0035-8711), vol. 229, Dec. 1, 1987, p. 529-538.
Astronomy and Astrophysics
Astronomy
72
B Stars, Binary Stars, O Stars, Stellar Evolution, Stellar Mass, Stellar Temperature, Main Sequence Stars, Mass Transfer, Stellar Luminosity, Stellar Mass Ejection, Stellar Winds
Scientific paper
The authors present a compilation of masses, radii, effective temperatures and luminosities for the components of 31 binary systems with spectral types in the range O - B5. Comparisons of the data on the 16 detached systems in the sample with main-sequence models for individual stars provides further observational confirmation of the recent (1981 - 86) conclusions from theoretical studies that convective overshooting and stellar-wind mass loss must be included in evolutionary models. A convenient empirical mass-luminosity relationship for the mass range 3.5 - 20 M_sun; is also determined from these detached components. Of the remaining systems, eight are in semi-detached configurations and seven are in (mostly) marginal-contact states. Comparisons of these observational data with evolutionary models for binary stars published by Sybesma are made and it is concluded that all the systems in this sample have evolved or will evolve through a case A mass-transfer process.
Bell Aaron S.
Hilditch Ron W.
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