Contact binaries at different evolutionary stages

SB Qian, LY Zhu, L Liu, XD Zhang, XD Shi… - … in Astronomy and …, 2020 - iopscience.iop.org
Contact binaries consist of two strongly interacting component stars where they are filling
their critical Roche lobes and sharing a common envelope. Most of them are main-sequence …

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 …

Deep, low mass ratio overcontact binary systems. XIV. A statistical analysis of 46 sample binaries

YG Yang, SB Qian - The Astronomical Journal, 2015 - iopscience.iop.org
DEEP, LOW MASS RATIO OVERCONTACT BINARY SYSTEMS. XIV. A STATISTICAL
ANALYSIS OF 46 SAMPLE BINARIES - IOPscience Skip to content IOP Science home …

Different evolutionary pathways for the two subtypes of contact binaries

XD Zhang, SB Qian, WP Liao - Monthly Notices of the Royal …, 2020 - academic.oup.com
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 …

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 …

The First Photometric and Spectroscopic Studies of ASASSN-V J015428. 67+ 204247.2 and its Relation to the Population of Low Mass Ratio Contact Binaries

KX Li, K Li, F Liu, X Gao, GY Sun… - Publications of the …, 2023 - iopscience.iop.org
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 …

On the minimum mass ratio of W UMa binaries

D Jiang, Z Han, J Wang, T Jiang… - Monthly Notices of the …, 2010 - academic.oup.com
Using Eggleton's stellar evolution code, we study the minimum mass ratio (q min) of W
Ursae Majoris (W UMa) binaries that have different primary masses. It is found that the …

NSVS 2569022: a peculiar binary among W UMa stars with extremely small mass ratios

DP Kjurkchieva, VA Popov… - Research in Astronomy …, 2018 - iopscience.iop.org
Photometric observations of the W UMa binary NSVS 2569022 are presented. The light
curve solution reveals that both components are of F spectral type (temperatures T 1= T 2 …

IP Lyn: A Totally Eclipsing Contact Binary with an Extremely Low Mass Ratio

ZX Yin, ZB Meng, PR Wu, XD Zhang… - … in Astronomy and …, 2023 - iopscience.iop.org
We present the first photometric and orbital period investigations for a neglected totally
eclipsing contact binary IP Lyn. The photometric solutions derived from both ground-based …

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 …