Astronomy and Astrophysics – Astrophysics
Scientific paper
Jun 1975
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1975a%26a....41...47s&link_type=abstract
Astronomy and Astrophysics, vol. 41, no. 1, June 1975, p. 47-52.
Astronomy and Astrophysics
Astrophysics
34
Binary Stars, Stellar Motions, Supernovae, X Ray Binaries, X Ray Sources, Astronomical Models, Eccentric Orbits, Neutron Stars, Stellar Mass Ejection, Supergiant Stars
Scientific paper
Effects are analyzed of a spherically symmetric explosion on the runaway velocity of a close binary system with an initial circular orbit. It is shown that the runaway velocity is fully determined by the final orbital parameters and that the runaway velocities of known massive X-ray binaries are probably less than about 100 km/s if the postexplosion eccentricities are less than about 0.25. The masses and orbital parameters of pre-explosion primaries are estimated, and an upper mass limit is derived for the exploded star in Cyg X-1. It is suggested that the explosion in Her X-1 could not have been triggered by mass transfer and that this system most likely evolved from a Population I object.
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