Cyclic period changes are a fairly common phenomenon in close binary systems and are
usually explained as being caused either by the magnetic activity of one or both components …

A catalogue of (411) Algol-type (semi-detached) binary stars is presented in the form of five
separate tables of information. The catalogue has developed from an earlier version by …

Using 27 sets of new multiband photometry light curves acquired from our long-term
photometric campaign carried out in the last 5 yr and high-resolution spectroscopic data …

ABSTRACT V375 Cassiopeia (V375 Cas) is an early B-type close binary with an orbital
period of 1.4734273 d. Based on high-quality and continuous light curves from the …

Photometric solutions of two short period close binaries, V473 Cas and II Per, are derived
with the 2003 version Wilson–Van Hamme code. It is shown that V473 Cas is a …

By using high dispersion spectra obtained by the 1.8 m telescope of Bohyunsan Optical
Astronomy Observatory (South Korea), multiline least-square deconvolution of line profiles …

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

Despite the discovery of LL Com, a Lyrae-type eclipsing binary system, approximately 60 yr
ago, little has been found concerning its detailed photometry and orbital-period change until …

The first complete multi-color CCD photometric light curves of the eclipsing binary AS Ser
were obtained over three nights in 2005. Using the latest Wilson–Devinney (WD) code, we …

New spectroscopy of the classical Algol system δ Lib, combined with high-quality optical and
infrared photometry, provides the basis for a good understanding of the close binary …