CAOSP abstracts, Volume: 55, No.: 3, year: 2025

Author(s): Lantzi, L.; Christopoulou, P.-E.
Journal: Contributions of the Astronomical Observatory Skalnaté Pleso, vol. 55, no. 3, p. 478-480.
Date: 04/2025
Title: The first orbital period investigation of low mass ratio systems from Catalina Sky Survey
Keyword(s): contact binaries- eclipsing binaries, period variation
Pages: 478 -- 480
DOI: https://doi.org/10.31577/caosp.2025.55.3.478
NASA ADS Abstract Service: 2025CoSka..55c.478L
Citation:
License: This work is licensed under a Creative Commons Attribution 4.0 International License

Abstract: We present the first results of our project to analyze the orbital period variations of 5 newly discovered low-mass ratio (LMR) eclipsing binaries from the Catalina survey. We collected data from CRTS, LINEAR, SUPERWASP, ASSASN, ZTF, and ATLAS, covering a time of 10-15 years, and determined the mid-eclipse times by fitting our CSS light curve model and varying the conjunction times. Analyzing the ETVs the highest rate of period variation was found in the order of 10^-6 days/year and only in one case, we derive an additional light-time effect and a period of a possible third body of 12.8 yr.