Physical parameters of close binary systems: VI

TL;DR

This paper presents new photometric data and analyzes ten W UMa-type binary systems to determine their physical parameters, revealing contact configurations with varying fill-out factors and bright primaries due to high temperatures.

Contribution

It provides high-quality multicolor light curves and detailed physical parameters for ten close binary systems using Wilson-Devinney modeling, expanding understanding of their contact configurations.

Findings

All systems are in contact configurations.

Fill-out factors vary from low to high among the systems.

Several primaries are very bright due to high temperatures.

Abstract

New high-quality CCD photometric light curves for the W UMa-type systems V410 Aur, CK Boo, FP Boo, V921 Her, ET Leo, XZ Leo, V839 Oph, V2357 Oph, AQ Psc and VY Sex are presented. The new multicolor light curves, combined with the spectroscopic data recently obtained at David Dunlap Observatory, are analyzed with the Wilson-Devinney code to yield the physical parameters (masses, radii and luminosities) of the components. Our models for all ten systems resulted in a contact configuration. Four binaries (V921 Her, XZ Leo, V2357 Oph and VY Sex) have low, while two (V410 Aur and CK Boo) have high fill-out factors. FP Boo, ET Leo, V839 Oph and AQ Psc have medium values of the fill-out factor. Three of the systems (FP Boo, V921 Her and XZ Leo) have very bright primaries as a result of their high temperatures and large radii.