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 …

The cutoff mass ratio is under debate for contact binaries. In this paper, we present the
investigation of two contact binaries with mass ratios close to the low mass ratio limit. It is …

Multi-band photometric observations of 11 totally eclipsing contact binaries were carried out.
Applying the Wilson–Devinney program, photometric solutions were obtained. There are two …

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 …

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 …

The photometric and spectroscopic studies of three contact binaries, ASASSN-V J052036.
28+ 144711.0, ASASSN-V J064846. 22+ 241709.9, and ASASSN-V J073441. 02+ 555833.0 …

The open cluster NGC 6791 has been the focus of much recent study due to its intriguing
combination of old age and high metallicity (∼ 8 Gyr,[Fe/H]=+ 0.30), as well as its location …

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 present the photometric analysis of three ultra-short-period total eclipsing binaries in
contact configuration, CRTS_J172718. 0+ 431624, OGLE-BLG-ECL-000104, and OGLE …

We performed photometric, spectroscopic and orbital period investigations of ASASSN-V
J015428. 67+ 204247.2 (hereafter, J015428) for the first time. The light curves of VRI bands …