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Carbon deficiencies in the primaries of some classical Algols
The equivalent widths (EWs) of the C ii lambda 4267 angstrom line were measured for the mass-gaining primary stars of 18 Algol-type binary systems. The EWs of the gainers were compared with the EWs of single standard stars ...
Spectroscopic and photometric analysis of three detached binary systems: AP And, VZ Cep and V881 Per
We present results from analysis of combined spectroscopic and photometric data for three eclipsing binary systems: AP And, VZ Cep and V881 Per. Based on new, multicolour photometric light curves and spectroscopically ...
Dynamical analyses of the companions orbiting eclipsing binaries - I. SW Lacertae
New mid-eclipse times of the short-period eclipsing binary SW Lacertae are reported, and two cyclical variations are found in the corresponding O - C diagram. The proposed light-travel time model is refined. The best fit ...