Wolf-Rayet stars, black holes and the first detected gravitational wave source

Abstract

The recently discovered burst of gravitational waves GW150914 provides a good new chance to verify the current view on the evolution of close binary stars. Modern population synthesis codes help to study this evolution from two main sequence stars up to the formation of two final remnant degenerate dwarfs, neutron stars or black holes [Massevich 1988]. To study the evolution of the GW150914 predecessor we use the "Scenario Machine" code presented by [Lipunov 1996]. The scenario modelling conducted in this study allowed to describe the evolution of systems for which the final stage is a massive BH+BH merger. We find that the initial mass of the primary component can be $100÷140M_{\odot }$ and the initial separation of the components can be $50÷350R_{\odot }$. Our calculations show the plausibility of modern evolutionary scenarios for binary stars and the population synthesis modelling based on it.

arXiv comment52 pages, 23 figures, 5 tables, accepted by New Astronomy

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• Scanning Fabry--Perot Interferometer of the 6-m SAO RAS Telescope
• Comparing the birth rate of stellar black holes in binary black hole mergers and long GRBs