Astronomy and Astrophysics – Astrophysics
Scientific paper
Jun 1986
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1986a%26a...161...75h&link_type=abstract
Astronomy and Astrophysics (ISSN 0004-6361), vol. 161, no. 1, June 1986, p. 75-84.
Astronomy and Astrophysics
Astrophysics
4
O Stars, Stellar Evolution, Supernovae, Wolf-Rayet Stars, X Ray Binaries, Stellar Mass Accretion, Stellar Models, Stellar Winds
Scientific paper
Based on evolutionary computations of models of five observed WR + O binaries, the transition of WR + O binaries into compact +O systems after the supernova explosion, and the subsequent evolution into active X-ray binaries, are studied. Computations indicate that the system will remain bound after the supernova explosion, forming a compact of +O binary with a runaway velocity of a few tens of km/s, and will later evolve into an X-ray binary, with X-rays powered at first by stellar wind accretion, and later on, by Roche lobe overflow. Two separate runaway objects, a pulsar and an O star, are formed in the case of disruption. A total X-ray lifetime of several hundred thousand years is found for systems evolving through case A of mass transfer, and of between 5000 and 8000 years for case B. The calculated average X-ray lifetime for massive X-ray binaries of one million years is confirmed by observations.
de Loore Camiel
Hellings P.
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