Astrophysics and Space Science

, Volume 53, Issue 1, pp 105–130 | Cite as

The evolution of massive close binaries

VI: Final considerations for the conservative case
  • J. P. De Grève
  • C. De Loore
  • E. L. Van Dessel
Article

Abstract

The results of evolutionary computations for massive binary systems (initial masses of the primary ≳10M) with mass ratios between 0.3 and 0.8 are summarized and compared with observations in order to verify how far one can go with the conservative assumption of mass exchange. It is found that conservative mass exchange leads to acceptable first-order models of W-R and massive X-ray binaries. However, the comparison between this theory and observation reveals that for the observed systems (W-R and X-ray binaries) a preference exists for low intial mass ratios; moreover, the X-ray luminosities of the theoretical models are systematically too low, though this may be due to the adopted wind model. In addition, the influences of several parameters (distance between the components, chemical composition, primary mass, mass ratio and atmosphere) are examined. These parameters influence the remnant mass and any further evolution only marginally. Attention is also given to the effect on the system parameters of a supernova explosion of the remnant of the mass-losing component. For a large range of systems a disruption probability smaller than 25% is found.

Keywords

Mass Exchange Conservative Mass Evolutionary Computation Initial Mass Wind Model 

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Copyright information

© D. Reidel Publishing Company 1978

Authors and Affiliations

  • J. P. De Grève
    • 1
  • C. De Loore
    • 1
  • E. L. Van Dessel
    • 2
  1. 1.Astrophysical InstituteVrije Universiteit BrusselBelgium
  2. 2.Royal ObservatoryUccleBelgium

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