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The Evolution of Massive Close Binary Systems : Estimates of the Parameters Governing Mass and Angular Momentum Loss

Published online by Cambridge University Press:  14 August 2015

D. Vanbeveren  and
C. De Loore
D. Vanbeveren
Affiliation:
Astrophysical Institute, Vrije Universiteit Brussel, Brussels, Belgium
C. De Loore
Affiliation:
Astrophysical Institute, Vrije Universiteit Brussel, Brussels, Belgium

Extract

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It becomes more and more evident that for close binary evolution during Roche lobe overflow as well mass transfer as mass loss occurs. When a mass element ΔM is expelled from the primary during this phase, a fraction β is transferred to the secondary; the remaining part leaves the system. Moreover, angular momentum leaves the system, and also this fraction has to be specified; this fraction is related to a parameter α (Vanbeveren et al., 1979). For the computation of the evolution of massive close binaries also mass loss due to stellar wind of both components, prior to the Roche lobe overflow has to be taken into account. The mass loss rate Ṁ due to radiation driven stellar winds can be expressed as

Type
III. Mass Transfer and Mass Loss - Theory
Information
Symposium - International Astronomical Union , Volume 88: Close Binary Stars: Observations and Interpretation , 1980 , pp. 115 - 121
Copyright
Copyright © Reidel 1980 

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