Astronomy and Astrophysics – Astrophysics
Scientific paper
Aug 1987
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1987a%26a...182..207v&link_type=abstract
Astronomy and Astrophysics (ISSN 0004-6361), vol. 182, no. 2, Aug. 1987, p. 207-218.
Astronomy and Astrophysics
Astrophysics
22
Binary Stars, Convective Flow, Stellar Envelopes, Stellar Evolution, Stellar Mass Ejection, Stellar Models, Gravitational Collapse, Main Sequence Stars, Roche Limit, Stellar Cores, Stellar Mass Accretion, Wolf-Rayet Stars
Scientific paper
Observations of massive stars are compared with evolutionary calculations for stars of more than 20 solar masses without convective core overshooting. The stellar wind mass loss rate formalism during core hydrogen burning is related to the maximum extension in the HR diagram of the latter phase. A qualitative theory of the amount of matter leaving the binary system during the Roche lobe overflow phase of the primary is presented, and emphasis is given to the evolution of the secondary star during the latter phase. A comparison of the results obtained with the observed properties of OB and W-R stars indicates that the present close binary evolutionary model is able to explain all observed W-R and OB binaries, and is the only current model able to reproduce the observed characteristics of most of the observed systems.
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