New low mass ratio contact binaries in the Catalina Sky Survey

PE Christopoulou, E Lalounta… - Monthly Notices of …, 2022 - academic.oup.com
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 …

ZZ Piscis Austrinus (ZZ PsA): a bright red nova progenitor and the instability mass ratio of contact binary stars

SS Wadhwa, A De Horta, MD Filipović… - Monthly Notices of …, 2021 - academic.oup.com
ABSTRACT ZZ Piscis Austrinus (ZZ PsA) is a neglected bright southern contact binary
system with maximum V magnitude of 9.26. We present the first multiband photometric …

Estimating the absolute parameters of W UMa-type binary stars using Gaia DR3 parallax

A Poro, M Hedayatjoo, M Nastaran, M Nourmohammad… - New Astronomy, 2024 - Elsevier
The accuracy of absolute parameters' estimation in contact binary systems is important for
investigating their evolution and solving some challenges. The Gaia DR3 parallax is one of …

Two W-subtype contact binaries: GQ Boo and V1367 Tau

J Zhang, SB Qian, ZT Han, Y Wu - Monthly Notices of the Royal …, 2017 - academic.oup.com
Two contact binaries, GQ Boo and V1367 Tau, were observed and analysed with a new
method to obtain the absolute parameters. The light-curve analysis shows that both of them …

High Fill-Out, Extreme Mass Ratio Overcontact Binary Systems. VIII. EM Piscium

SB Qian, JJ He, B Soonthornthum, L Liu… - The Astronomical …, 2008 - iopscience.iop.org
ABSTRACT CCD photometric observations of the newly discovered close binary, EM
Piscium, obtained from 2006 December 4 to 2008 January 7, are presented. The light curves …

Am-Type Eclipsing Binary V2787 Ori: An Evolved Shallow-contact Binary with an Extremely Low Mass Ratio

X Tian, L Zhu, Z Wang - … of the Astronomical Society of the Pacific, 2019 - iopscience.iop.org
The first complete multicolor CCD light curves and low-resolution spectra of the short-period
Am-type eclipsing binary V2787 Ori are presented. The atmospheric parameters of the …

Continuous O'Connell effect and period variations of solar-like totally eclipsing contact binary BO Ari

M Guo, J Wang, J Zhang, X Tian - New Astronomy, 2025 - Elsevier
We obtained newly BV R c I c light curves for the contact binary BO Ari in 2023. The multi-
color light curves were analyzed using the Wilson–Devinney (2013) program, which …

Photometric solution and period analysis of the contact binary system AH Cnc

YJ Peng, ZQ Luo, XB Zhang, LC Deng… - … in Astronomy and …, 2016 - iopscience.iop.org
Photometric observations of AH Cnc, a W UMa-type system in the open cluster M67, were
carried out by using the 50BiN telescope. About 100 h of time-series B-and V-band data …

V802 Aquilae: A Short-Period Eclipsing Binary with Magnetic Activity

YG Yang, SB Qian, LY Zhu, L Liu… - Publications of the …, 2008 - academic.oup.com
New CCD observations for V802 Aql were observed from 2004 to 2007, and seven light
minimum timings were obtained. Using the Wilson–Devinney code, the photometric solution …

BM UMa: A middle shallow contact binary at pre-transition stage of evolution from W-type to A-type

T Sarotsakulchai, B Soonthornthum… - Publications of the …, 2021 - academic.oup.com
In this study, all unpublished time series photometric data of BM UMa (q∼ 2.0, P= 0.2712 d)
from available archives were re-investigated together with new data taken from the 2.4-m …