Astronomy and Astrophysics – Astronomy
Scientific paper
Dec 1976
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1976ap%26ss..45..337c&link_type=abstract
Astrophysics and Space Science, vol. 45, Dec. 1976, p. 337-352. Research supported by the Consiglio Nazionale delle Ricerche.
Astronomy and Astrophysics
Astronomy
Binary Stars, Stellar Luminosity, Stellar Models, Stellar Winds, X Ray Binaries, X Ray Stars, Mass Ratios, Mass Transfer, Stellar Atmospheres, Stellar Evolution, X Ray Astronomy
Scientific paper
The six best known X-ray binaries are investigated according to the two different assumptions on the mechanism of matter supply. From the model of a semidetached system with a pointlike component, rather good estimates for the masses of the stars and the radius of the optical component can be deduced. The stellar-wind model appears to be generally insufficient for maintaing the X-ray luminosity. Therefore, according to the mass ratios, the stars may be at the beginning of mass exchange. Only 3U 1700-37 shows inconsistent observational data. In the frame of the Roche model, values of the contact phase angles, in the case of one star filling its lobe and a pointlike companion, are given as a function of the mass ratio and the orbital inclination angle. The limiting minimum inclination angle for an eclipse is also given.
Cester Bruno
Mezzetti Marino
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