CAOSP abstracts, Volume: 54, No.: 2, year: 2024

Author(s): Hambálek, Ľ.; Pribulla, T.
Journal: Contributions of the Astronomical Observatory Skalnaté Pleso, vol. 54, no. 2, p. 175-181.
Date: 02/2024
Title: The uniqueness of determination of the photometric mass ratio of contact binary stars with applications to selected binaries
Keyword(s): Stars: binaries: eclipsing, Techniques: photometric
Pages: 175 -- 181
DOI: https://doi.org/10.31577/caosp.2024.54.2.175
NASA ADS Abstract Service: 2024CoSka..54b.175H
Citation:
License: This work is licensed under a Creative Commons Attribution 4.0 International License

Abstract: We have used a Roche-geometry code to pre-generate light curves of contact binary stars using only mass ratio q, fill out f of the Roche lobes, and the inclination i of the orbital plane. We have parametrized TESS light curves of several binaries with a trigonometric polynomial. We used our code UNiQUE to find the best fit of the overall shape of the observed light curve and its associated parameters (q, f, i). We compared these parameters to those from a rigorous modelling of our selected objects with known mass ratio q_sp inferred from spectra. The method is useful to find a close solution before the full modelling. We also got an indication of possible third light present in a system.