Wolf-Rayet stars, neutron stars, and black holes in binary systems

Details Wolf-Rayet stars, neutron stars, and black holes in binary systems Wolf-Rayet stars, neutron stars, and black holes in binary systems

Apr 2003

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2003kfnts...4..197c&link_type=abstract

Kinematika i Fizika Nebesnykh Tel, Suppl, no. 4, p. 197-204

Physics

Scientific paper

Distribution of final masses of carbon-oxygen (CO) cores of WR-stars in binary systems has been analysed. The mass loss via blobbed stellar wind from WR-stars was taken into account. Final masses of CO-cores of WR-stars are continuously distributed. They cover a wide range between (1-2) and (20-44)M_{&sun;}. This range includes possible masses of neutron stars (NS) and black holes (BH), which are equal 1/16M_{&sun;}. Although final masses of CO-cores of WR-stars, which are the progenitors of relativistic objects are continuously distributed, corresponding masses of relativistic objects are distributed in a bimodal way: masses of NS lie in a narrow range 1/2M_{&sun;}, those of BH lie in a range 4/16M_{&sun;}. There is a gap in the mass distribution from 2 to 4M_{&sun;}. It implies that there are no binary systems containing either NS or BH with masses from this interval. The gap is shown to be caused by the observational selection effects.

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