Observations and Preliminary Modeling of the Light Curves of Eclipsing Binary Systems NSVS 7322420 and NSVS 5726288

TL;DR

This study presents the first multi-band photometric observations and preliminary modeling of two eclipsing binary systems, revealing unique features in NSVS 7322420 and typical characteristics in NSVS 5726288.

Contribution

First multi-band photometry and preliminary light curve modeling of NSVS 7322420 and NSVS 5726288 using PHOEBE software.

Findings

NSVS 7322420 is a semi-detached system with unusual light curve features.

NSVS 5726288 is likely a detached binary system.

Unusual features in NSVS 7322420 may be due to mass transfer.

Abstract

We present new photometric observations of the $\beta$ Lyrae-type eclipsing binary systems NSVS 7322420 and NSVS 5726288. These observations represent the first multi-band photometry performed on these systems. The light curves were analyzed with PHOEBE, a front-end GUI based on the Wilson-Devinney program, to produce models to describe our observations. Our preliminary solutions indicate that NSVS 7322420 is a primary filling semi-detached system with unusual features warranting further study. These features include a pronounced O'Connell effect, a temporal variance in the light curve, and an unusual "kink" in the light curve around the secondary eclipse. The cause of these features is unknown, but one possibility is the transfer of mass between the component stars. Meanwhile, NSVS 5726288 is probably a typical detached system.