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 …

We present the identification and photometric analysis of 30 new low mass ratio (LMR)
totally eclipsing contact binaries found in Catalina Sky Survey data. The LMR candidates are …

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 …

Photometric analysis and spectroscopic study of the long-period low-mass-ratio deep-
contact binary KN Per were performed. The light curves of the BV (RI) c band were from the …

We performed photometric and spectroscopic investigations of NSVS 5029961 for the first
time. The new BV (RI) c-band light curves were obtained with the 1.0-m telescope at Weihai …

Context. Recent period investigations of the post-common envelop binary (PCEB) NSVS
14256825 suggest that two circumbinary companions are necessary to explain the observed …

Low mass ratio systems (LMR) are a very interesting class of contact eclipsing binaries
challenging the theoretical models of stability. These systems are also considered possible …

Discovery of star systems at the merger limit by large astronomical surveys Page 1 Contrib.
Astron. Obs. Skalnaté Pleso 54/2, 249 – 256, (2024) https://doi.org/10.31577/caosp.2024.54.2.249 …

We have conducted a survey of overcontact binary systems (EW) with mass ratio<= 0.25
from the Catalina Sky Survey (CSS) that are considered strong merger candidates and are …