High precision CCD observations of six totally eclipsing contact binaries were presented
and analyzed. It is found that only one target is an A-type contact binary (V429 Cam), while …

New relationships between the orbital period and some parameters of W Ursae Majoris (W
UMa)-type systems are presented in this study. To investigate the relationships, we …

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 …

Various scenarios of contact binary evolution have been proposed in the past, giving hints of
(sometimes contradictory) evolutionary sequences connecting A-and W-type systems. As the …

Period cut-off and period–colour relation are two special characters of W UMa-type contact
binaries. In the past, many authors noted these two properties, however, a comprehensive …

Secondary components of W UMa-type contact binaries (CBs) have many special
properties, two of them are excess in radius and luminosity. In order to make these …

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 …

CCD photometric observations of the short-period eclipsing binary GSC 0763–0572 were
carried out in the and bands at Yunnan Observatory in China. Three light minimum times …

TC BALIKESİR ÜNİVERSİTESİ SOSYAL BİLİMLER ENSTİTÜSÜ TARİH ANABİLİM DALI II.
MEŞRUTİYET DÖNEMİNDE İSLAMCILIK Page 1 TC BALIKESİR ÜNİVERSİTESİ SOSYAL …

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 …