The evolution of massive close binaries. VI - Final considerations for the conservative case

Details The evolution of massive close binaries. VI - Final considerations for the conservative case The evolution of massive close binaries. VI - Final considerations for the conservative case

Jan 1978

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1978ap%26ss..53..105d&link_type=abstract

Astrophysics and Space Science, vol. 53, no. 1, Jan. 1978, p. 105-130. Fonds de la Recherche Fondamentale Collective

Astronomy and Astrophysics

Astrophysics

34

Binary Stars, Stellar Evolution, Stellar Luminosity, Supernova Remnants, X Ray Stars, Chemical Composition, Conservation Laws, Mass Ratios, Mass Transfer, Stellar Models, X Ray Binaries

Scientific paper

The results of evolutionary computations for massive binary systems (initial masses of the primary greater than or equal to 10 solar masses) with mass ratios between 0.3 and 0.8 are compared with observations in order to verify the extent to which the conservative assumption of mass exchange applies. 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 initial mass ratios; moreover, the X-ray luminosities of the theoretical models are systematically too low, though this may be due to the wind model adopted. In addition, the influence of distance between the components, chemical composition, primary mass, mass ratio and atmosphere is 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 percent is found.

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