Astronomy and Astrophysics – Astrophysics
Scientific paper
Dec 1982
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1982a%26a...116..308d&link_type=abstract
Astronomy and Astrophysics, vol. 116, no. 2, Dec. 1982, p. 308-311. Fonds de la Recherche Fondamentale Collective
Astronomy and Astrophysics
Astrophysics
73
Hydrogen, Main Sequence Stars, Stellar Evolution, Stellar Mass Ejection, Binary Stars, Constraints, Hertzsprung-Russell Diagram, Stellar Models
Scientific paper
The observed extent of the main sequence band around log L/solar-L = 5.1 is used to place constraints on the amount of overshooting in a 20-solar-mass star. It follows that the amount of overshooting in 10-30-solar-mass stars can be determined by a linear relation between the total stellar mass and the mass of the convection core on the ZAMS. It is shown that stars with hydrogen-deficient atmospheres can be present in the whole upper main sequence band, corresponding to the location of most of the OBN and Of stars. Some consequences of the results for the evolution of massive close binaries are examined. A new relation between the remnant mass after Roche lobe overflow and the initial mass of the primary is derived, implying much larger remnant masses.
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