Bifurcation points in close binary evolution - Medium-mass binaries

Details Bifurcation points in close binary evolution - Medium-mass binaries Bifurcation points in close binary evolution - Medium-mass binaries

Jun 1982

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1982ap%26ss..84..447d&link_type=abstract

Astrophysics and Space Science, vol. 84, no. 2, June 1982, p. 447-456.

Astronomy and Astrophysics

Astrophysics

3

Binary Stars, Mass Transfer, Stellar Evolution, Stellar Mass, White Dwarf Stars, Helium, Mass Ratios, Nuclear Fusion, Radiative Lifetime

Scientific paper

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 medium-mass binaries with primaries in the mass range 5 solar masses. From the comparison of this quantity with the helium burning time-scale of the remnant primary a critical mass ratio qc is derived such that for larger values of q, 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.

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