Black holes in massive close binaries - Observational data and evolutionary status

Details Black holes in massive close binaries - Observational data and evolutionary status Black holes in massive close binaries - Observational data and evolutionary status

Dec 1985

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1985azh....62.1124t&link_type=abstract

(Astronomicheskii Zhurnal, vol. 62, Nov.-Dec. 1985, p. 1124-1131) Soviet Astronomy (ISSN 0038-5301), vol. 29, Nov.-Dec. 1985, p.

Astronomy and Astrophysics

Astronomy

10

Binary Stars, Black Holes (Astronomy), Stellar Evolution, Stellar Mass, Stellar Spectrophotometry, B Stars, Gravitational Collapse, Mass Transfer, Neutron Stars, O Stars, Stellar Magnetic Fields, Visible Spectrum, X Ray Binaries

Scientific paper

Modern data on the masses of candidate black holes in binary systems are summarized. The masses of components of binary systems with probable black holes are compared with the characteristics of the binary systems with neutron stars. It is pointed out that, concerning the masses of relativistic components, the separation into two groups takes place: Mx ≅ 1.6 M_sun; (neutron stars) and Mx ≅ (10 - 60) M_sun; (black holes candidates). The intermediate cases are presumably absent. The masses of relativistic objects do not correlate with the masses of optical stars. It is suggested that massive black holes with M ⪆ 10 M_sun; may be formed of collapsing cores of stars of ordinary (20 - 100) M_sun; initial mass, due to either the increase of the mass of the core of the presupernova, or to the weakness of the magnetic field. A disagreement by a factor of 10 - 30 between the observed numbers of black holes coupling with OB stars and with the radio pulsars is pointed out which may be connected with the "couple" formation of black holes.

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