Abstract
The final state of the primaries of binary systems with initial massesM 1i=10M ⊙ to 15M ⊙ is derived from the mass of their C/O-cores. The possibility of a second stage of mass transfer towards the secondary is considered. It turns out that the critical mass for the bifurcation is about 14M ⊙: stars with larger masses in this range are the progenitors of neutron stars, while the lower mass stars are the ancestors of white dwarfs.
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Research supported by the National Foundation of Collective Fundamental Research of Belgium (F.K.F.O.) under No. 10303.
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De Grève, J.P., De Loore, C. The evolution of massive close binaries. Astrophys Space Sci 50, 75–85 (1977). https://doi.org/10.1007/BF00648520
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DOI: https://doi.org/10.1007/BF00648520