Astronomy and Astrophysics – Astrophysics
Scientific paper
Feb 1988
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1988ap%26ss.141..257z&link_type=abstract
Astrophysics and Space Science (ISSN 0004-640X), vol. 141, no. 2, Feb. 1988, p. 257-270. Research supported by the National Natu
Astronomy and Astrophysics
Astrophysics
11
Binary Stars, Equipotentials, Radiation Pressure, Roche Limit, Stellar Temperature, Wolf-Rayet Stars, High Temperature, Lagrangian Equilibrium Points, Stellar Mass
Scientific paper
The authors consider the effect of the radiation pressure from both components of the high-temperature binary systems in terms of a modified Roche potential. Usually, the parameters of radiation pressures δ1, δ2 can be written as a function of radii R, effective temperature Teff, and mass M of components. The simulation calculation shows that the positions of saddle points L1, L2, L3 and shape of critical surface are changed with radiation pressure factors δ1, δ2. Consequently, use of the conventional critical Roche model to estimate value of radii and mass ratios may be completely unwarranted if effective temperature of both components Teff ≥ 30000K. These conclusions are applied to Wolf-Rayet binary systems V444 Cygni, ν2 Velorum, and O-type binary system Y Cygni. The modified critical potentials are calculated and discussed.
Leung Kam-Ching
Zhou Hong-Nan
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