Analysis of Apsidal Motion and Light Curves of Three Eccentric Eclipsing Binaries: V398 Lac, V2544 Cyg and V785 Cas

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dc.contributor.authorBulut, I.
dc.date.accessioned2026-02-03T12:02:21Z
dc.date.available2026-02-03T12:02:21Z
dc.date.issued2025
dc.departmentÇanakkale Onsekiz Mart Üniversitesi
dc.description.abstractIn this study, the apsidal motion analyses of the eclipsing binary systems V398 Lac, V2544 Cyg, and V785 Cas are presented. The (O - C) diagrams of the selected systems were constructed using all available and reliable times of minimum light compiled from the literature. As a result, the apsidal motion periods were determined to be 353 +/- 50 yr, 43.3 +/- 5.1 yr and 83.4 +/- 8.5 yr, respectively. Furthermore, the TESS light curves of the three systems were analyzed to derive their photometric and absolute parameters. The component masses were determined as follows: for V398 Lac, M-1 = 3.83 +/- 0.35 M-circle dot and M-2 = 3.27 +/- 0.35 M-circle dot; for V2544 Cyg, M-1 = 1.75 +/- 0.38 M-circle dot and M-2 = 1.40 +/- 0.38 M-circle dot; for V785 Cas, M-1 = 5.64 +/- 0.41 M-circle dot and M-2 = 5.18 +/- 0.41 M-circle dot. The parameters related to apsidal motion, as well as the observational and theoretical internal structure constants ( k(2,obs)() and k(2,teo)()), were calculated for studied binaries. The relativistic contribution to the observed apsidal motion rate was found to be relatively small, constituting less than approximately 5% of the total rate in each system. The theoretical internal structure constants were derived from the evolutionary models, assuming a standard chemical composition of (X, Z) = (0.70, 0.01).
dc.description.sponsorshipNASA Science Mission Directorate
dc.description.sponsorshipGaia mission, a project of the European Space Agency (ESA)
dc.description.sponsorshipThe authors thank the anonymous referee who helped to improve the early version of the manuscript with his/her very useful comments. This paper includes data collected by the Transiting Exoplanet Survey Satellite (TESS) mission. Funding for TESS is provided by the NASA Science Mission Directorate. TESS data presented in this work were obtained from the Mikulski Archive for Space Telescopes (MAST). This work also presents results from the Gaia mission, a project of the European Space Agency (ESA). Gaia data are processed by the Gaia Data Processing and Analysis Consortium (DPAC). Funding for DPAC is provided by national institutions, in particular those participating in the Gaia MultiLateral Agreement (MLA). The Gaia mission website is: https://www.cosmos.esa.int/gaia, and the Gaia archive is accessible at: https://archives.esac.esa.int/gaia. Additionally, this research made use of the SIMBAD database, operated at CDS, Strasbourg, France, and NASA's Astrophysics Data System Bibliographic Services.
dc.identifier.doi10.1088/1674-4527/adf389
dc.identifier.issn1674-4527
dc.identifier.issn2397-6209
dc.identifier.issue10
dc.identifier.scopus2-s2.0-105015073255
dc.identifier.scopusqualityQ2
dc.identifier.urihttps://doi.org/10.1088/1674-4527/adf389
dc.identifier.urihttps://hdl.handle.net/20.500.12428/34711
dc.identifier.volume25
dc.identifier.wosWOS:001564121200001
dc.identifier.wosqualityQ2
dc.indekslendigikaynakWeb of Science
dc.indekslendigikaynakScopus
dc.institutionauthorBulut, I.
dc.language.isoen
dc.publisherIop Publishing Ltd
dc.relation.ispartofResearch in Astronomy and Astrophysics
dc.relation.publicationcategoryMakale - Uluslararası Hakemli Dergi - Kurum Öğretim Elemanı
dc.rightsinfo:eu-repo/semantics/closedAccess
dc.snmzKA_WOS_20260130
dc.subjectStars
dc.subject(stars:) binaries: eclipsing
dc.subjectstars: individual (V398 Lac, V2544 Cyg, V785 Cas)
dc.titleAnalysis of Apsidal Motion and Light Curves of Three Eccentric Eclipsing Binaries: V398 Lac, V2544 Cyg and V785 Cas
dc.typeArticle

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