Algol-type binaries (Algols) have aroused extensive interests due to the idiosyncratic
evolutionary stages of both components. To better understand the evolutionary properties of …

Aims. We report identification of cyclical changes in the orbital period of the eclipsing
cataclysmic variable HT Cas. Methods. We measured new white-dwarf mid-eclipse timings …

Context. The credibility of an eclipse timing variation (ETV) diagram analysis is investigated
for various manifestations of the mass transfer and gravitational radiation processes in …

Three Algol-type binary systems (IO Cep, IM Cep and TX Ari) showing cyclic orbital period
changes are studied. The combination of time of minimum data from the ground-based …

We present multi-color photometry of the eclipsing binary XZ And, obtained on 2010 October
and November with the 60-cm telescope at Xinglong station of National Astronomical …

The list of 240 eclipsing variables with the light equation (LITE effect) has been compiled.
Some characteristics of multiple systems have been determined assuming that those stars …

This paper presents results derived from analysis of new spectroscopic and photometric
observations of the chromospherically active binary system CF Tuc. New high-resolution …

New multi-color photometry of the eclipsing binary UU Leo, acquired from 2010 to 2013, was
carried out by using the 60-cm and 85-cm telescopes at the Xinglong station, which is …

The variations in the orbital periods of the eclipsing binary systems XZ Per and BO Vul have
been studied. It has been shown that the variations in the orbital period of the eclipsing …

Проведено исследование изменений орбитального периода в затменно-двойных
системах XZ Per и BO Vul. Показано, что изменения орбитального периода затменно …