Astronomy and Astrophysics – Astronomy
Scientific paper
Jan 2003
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2003arep...47...20t&link_type=abstract
Astronomy Reports, vol. 47, Issue 1, p.20-30
Astronomy and Astrophysics
Astronomy
Scientific paper
A brief review of the observed parameters of binary systems with black holes is presented. We discuss in detail the evolutionary status of the X-ray binary GRS 1915+105, which contains a massive black hole. Numerical simulations of the evolution of GRS 1915+105 at the X-ray stage indicate that the most probable initial mass of the optical component (donor star) is (1.5 )M &sun;. Two possible scenarios are suggested for the evolution of the system prior to the formation of the black hole. If the initial mass of the optical component was (2.5 )M &sun;, the system underwent a common-envelope phase; in this case, the initial mass of the black hole progenitor did not exceed ˜50M &sun;. If the initial mass of the donor was (1.5 2.5)M &sun;, a scenario without a common envelope is possible, with the initial mass of the black hole progenitor being smaller than ˜50M &sun;. The lack of information about the initial mass-ratio distribution for binary components for small q and the uncertainty of the system parameters make it impossible to give preference to a particular scenario for the system's prior evolution.
Cherepashchuk Anatol M.
Fedorova Alexandra V.
Tutukov Aleksandr V.
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