Astrophysics and Space Science

, Volume 36, Issue 1, pp 219–225 | Cite as

Evolution of massive close binaries

II: The post X-ray binary stage: Origin of run-away and binary pulsars
  • C. de Loore
  • J. P. de Grève
  • J. P. de Cuyper


The further evolution of a massive X-ray binary consisting of a compact object and an OB supergiant is outlined. The supergiant exceeds its critical Roche lobe and a second stage of mass transfer starts. The remnant of the mass losing star — a pure helium star — develops a collapsing iron core and finally undergoes a supernova explosion. If the compact companion is a black hole the system remains bound; if the compact companion is a neutron star the system is disrupted unless an extra kick allowing an asymmetric explosion is given. Computations were performed for the massive binary 22.5M+2M. The possible final evolutionary products are: (1) a black hole and a compact object, in a binary system, (2) two run-away pulsars, (3) a binary pulsar.

As final parameters for the described system the eccentricity and period for the recently discovered binary pulsar 1913+16 may be found. An orbital inclination ofi=40° may be derived. The probability for the generation of binary pulsars is very low; in most cases the system is disrupted during the supernova explosion.


Black Hole Mass Transfer Neutron Star Evolutionary Product Compact Object 
These keywords were added by machine and not by the authors. This process is experimental and the keywords may be updated as the learning algorithm improves.


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Copyright information

© D. Reidel Publishing Company 1975

Authors and Affiliations

  • C. de Loore
    • 1
  • J. P. de Grève
    • 1
  • J. P. de Cuyper
    • 1
  1. 1.Astrophysical InstituteVrije Universiteit BrusselBelgium

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