Astrophysics and Space Science

, Volume 84, Issue 2, pp 447–456 | Cite as

Bifurcation points in close binary evolution: Medium-mass binaries

  • J. P. De Grève


The remaining core hydrogen burning lifetime after case B of mass transfer of the secondary (mass gaining) component in a medium mass close binary star is estimated, for mediummass binaries with primaries in the mass range 5M to 9M. From the comparison of this quantity with the helium burning time-scale of the remnant primary a critical mass ratioqc is derived such that for larger values ofq, mass transfer from the secondary towards the primary starts before the latter has evolved into a white dwarf. Consequences for the advanced stages of medium mass binaries are discussed.


Burning Mass Transfer Medium Mass Bifurcation Point Critical Mass 
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Copyright information

© D. Reidel Publishing Co 1982

Authors and Affiliations

  • J. P. De Grève
    • 1
  1. 1.Astrophysical InstituteVrije Universiteit BrusselBelgium

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