Close Binary Stars. V: Eclipsing Star Systems with Extended Atmospheres

The article presents an overview of eclipsing systems that contain stars with extended atmospheres. The characteristics of Wolf–Rayet stars are described. A method for interpreting the light curves of eclipsing systems with extended atmospheres is analyzed. The light curve of the eclipsing system V 444 Cyg is analyzed on a set of convex-concave functions. The reconstruction of the velocity field in the stellar wind of the WN5 star in the V 444 Cyg system is described using a parametric model. The light curve and characteristics of the components of the eclipsing binary WN3(h)+O5V BAT 99-129 are analyzed. The parameters of the WR star in the peculiar X-ray binary Cyg X-3, as well as the parameters and evolutionary stage of WR stars in the very massive eclipsing system WR20a (WN6ha+WN6ha) are described.