Light Curve Analysis of Overcontact Binary System TIC 125754458

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Published: Jun 30, 2025
Keywords:
Light curve analysis Overcontact binary system Model of system Evolution

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Supattra Wongsriya
Physics program, Faculty of Science, Buriram Rajabhat University, Buriram 31000

Abstract

The objectives of this study were to analyze the light curves and investigate the evolutionary stages of overcontact eclipsing binary star systems with low mass ratios (q < 0.25). Observations were conducted using optical data gathered from a reflecting telescope in the visible spectrum, following the Johnson-Cousins UBVRCIC photometric systems, along with data from the TESS telescope. The optical analysis results were applied to determine the physical characteristics and develop a model for studying the evolution of the overcontact binary system. The findings revealed a symmetrical light curve typical of a W UMa Subtype A eclipsing binary system, with a newly determined orbital period of 0.412519±0.000001 days. According to the Angular Momentum Loss (AML) theory, this period is decreasing at a rate of 1.354039±1.382400×10-7 day per year. Additionally, the third light in the eclipsing binary system (EB) was analyzed, indicating a sinusoidal pattern with an amplitude of approximately 0.007950 days and an orbital period of about 20 years for the third body.

Article Details

Issue
Vol.33 No.3 (May - June2025)
Section
Physical Sciences

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