First Multicolor Photometry of 1SWASP J130111.22+420214.0 and 1SWASP J231839.72+352848.2

TL;DR

This study presents the first multicolor photometry and light curve analysis of two stars, estimating their physical parameters and suggesting possible evolutionary states, with one star identified as a rotating ellipsoidal variable.

Contribution

It provides the first multicolor observations and physical parameter estimates for these stars, and proposes a new classification for one based on light curve analysis.

Findings

Estimated physical parameters for 1SWASP J130111.22+420214.0.

Identification of 1SWASP J231839.72+352848.2 as a potential rotating ellipsoidal variable.

Comparison of the star's components with other binary systems in evolutionary diagrams.

Abstract

The first multicolor observations and light curve solutions of the stars 1SWASP J130111.22+420214.0 and 1SWASP J231839.72+352848.2 are presented. The estimated physical parameters of 1SWASP J130111.22+420214.0 are $M_1=1.0M_{\odot}$, $M_2=1.63M_{\odot}$, $R_1=0.77R_{\odot}$, $R_2=0.91R_{\odot}$, $L_1=0.59L_{\odot}$, and $L_2=0.68L_{\odot}$. While a binary model could not be fitted to the light curve of 1SWASP J231839.72+352848.2, its Fourier series representation indicates that this system could well be a rotating ellipsoidal variable. The components of 1SWASP J130111.22+420214.0 are also compared to other well--known binary systems and their position in mass--radius plane and the Hertzsprung--Russel diagram are argued and possible evolutionary statuses are discussed.