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Evolutionary Sequences for Binary Stars in the Mass Range 9 to 40 M⊙

Published online by Cambridge University Press:  07 August 2017

C. De Loore  and
J.P. De Greve
C. De Loore
Affiliation:
(1) Astrophysical Institute - Vrije Universiteit Brussel, Belgium (2) Astrophysics Research Group, University of Antwerp, RUCA, Belgium
J.P. De Greve
Affiliation:
(1) Astrophysical Institute - Vrije Universiteit Brussel, Belgium

Abstract

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A set of evolutionary sequences for the two components of massive close binaries in the mass range 9 to 40 M⊙ for mass ratios 0.9 and 0.6 has been calculated. The used code accounts for mass transfer according to case B, i.e. mass exchange after core hydrogen exhaustion, during semi-detached and contact phases. All models were computed for a single initial chemical composition X = 0.7, Z = 0.02. Stellar wind mass losses were taken into account, as well as convective core overshooting (α = 0.25). The Roche lobe overflow was calculated according to a simplified hydrodynamical treatment. For the mixing of infalling material with the originally present layers the process of thermohaline mixing was adopted. It was assumed that 50% of the matter lost by the primary is accreted by the secondary.

Type
Oral and Contributed Papers
Information
Symposium - International Astronomical Union , Volume 151: Evolutionary Processes in Interacting Binary Stars , 1992 , pp. 299 - 302
Copyright
Copyright © Kluwer 1992 

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