Theoretical study indicates that a contact binary system would merge into a rapidly rotating
single star due to tidal instability when the spin angular momentum of the system is more …

When the total angular momentum of a binary system J tot= J orb+ J spin is at a certain
critical (minimum) value, a tidal instability occurs which eventually forces the stars to merge …

The four-color (B, V, R c, I c) light curves of V776 Cas are presented and analyzed using the
Wilson–Devinney method. It is discovered that V776 Cas is an early F-type (F2V) …

When the total angular momentum of a binary system is at a critical (minimum) value, a tidal
instability occurs (Darwin's instability), eventually forcing the stars to merge into a single …

The paper presents combined spectroscopic and photometric orbital solutions for ten close
binary systems: CN And, V776 Cas, FU Dra, UV Lyn, BB Peg, V592 Per, OU Ser, EQ Tau …

We analyse the CoRoT and V-passband ground-based light curves of the interacting close
binary AU Mon, assuming that there is a geometrically and optically thick accretion disc …

We analyse multicolour light curves and high-resolution optical spectroscopy of the eclipsing
binary and double periodic variable (DPV) OGLE 05155332− 6925581. According to …

We present new, high-quality multicolor observations of four recently discovered contact
binaries, 1SWASP J064501. 21+ 342154.9, 1SWASP J155822. 10-025604.8, 1SWASP …

The UBVR light curves of the massive eclipsing binary RY Sct, obtained at the Maidanak
Observatory from 1979 to 1992, have been re-analyzed in order to prove the hypothesis of …

This second part of our study concerning gravity-darkening presents the results for 8 semi-
detached close binary systems. From the light-curve analysis of these systems the exponent …