Physical Parameters of Some Close Binaries: ET Boo, V1123 Tau, V1191 Cyg, V1073 Cyg and V357 Peg

TL;DR

This study provides updated absolute parameters and orbital solutions for five close binary systems, including the first detailed analysis of ET Boo, revealing their contact or detached binary nature.

Contribution

It presents new BVR CCD photometry and orbital solutions for five binaries, including the first detailed parameters for ET Boo.

Findings

ET Boo is a detached binary system.

V1123 Tau, V1191 Cyg, V1073 Cyg, and V357 Peg are contact binaries.

The study discusses the evolutionary status of the components.

Abstract

With the aim of providing new and up-to-date absolute parameters of some close binary systems, new BVR CCD photometry was carried out at the Ankara University Observatory (AUG) for five eclipsing binaries, ET Boo, V1123 Tau, V1191 Cyg, V1073 Cyg and V357 Peg between April, 2007 and October, 2008. In this paper, we present the orbital solutions for these systems obtained by simultaneous light and radial velocity curve analyses. Extensive orbital solution and absolute parameters for ET Boo system were given for the first time through this study. According to the analyses, ET Boo is a detached binary while the parameters of four remaining systems are consistent with the nature of contact binaries. The evolutionary status of the components of these systems are also discussed by referring to their absolute parameters found in this study.