BSN-III: The First Multiband Photometric Study on the Eight Total Eclipse Contact Binary Stars

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dc.authorid0000-0003-3590-335X
dc.authorid0000-0001-7715-2182
dc.authorid0000-0003-1263-808X
dc.authorid0000-0002-7348-8815
dc.authorid0000-0002-0196-9732
dc.authorid0009-0005-9482-264X
dc.contributor.authorPoro, Atila
dc.contributor.authorLi, Kai
dc.contributor.authorMichel, Raul
dc.contributor.authorWang, Li-Heng
dc.contributor.authorAlicavus, Fahri
dc.contributor.authorAlizadeh, Ghazal
dc.contributor.authorAltamirano-Devora, Liliana
dc.date.accessioned2026-02-03T12:02:21Z
dc.date.available2026-02-03T12:02:21Z
dc.date.issued2025
dc.departmentÇanakkale Onsekiz Mart Üniversitesi
dc.description.abstractThis study continues our in-depth investigation of total-eclipse W Ursae Majoris-type contact binaries by analyzing eight new systems, complementing our previous work. Multiband BVRcIc photometric data were acquired through ground-based observations at an observatory in Mexico, from which new times of minima were determined. Our analysis of orbital period variations using the O - C method revealed that one system shows no long-term variation, four systems exhibit a secular decrease in their orbital periods, and two systems exhibit a secular increase, suggesting mass transfer between the components. Notably, one system displays a cyclic variation with an amplitude of 0.00865 days and a period of 10.49 yr, which we attribute to the light travel time effect induced by a tertiary companion, possibly a brown dwarf. We modeled the light curves using the PHysics Of Eclipsing BinariEs Python code. Six of the target systems required the inclusion of a cold starspot on one of the system's stars due to the asymmetry observed in the maxima of their light curves. Absolute parameters were estimated using the Gaia DR3 parallax method. Using the components' effective temperatures and masses, we classified five of the systems as W-subtype and three as A-subtype. The stellar evolution was illustrated through the mass-radius and mass-luminosity diagrams. Furthermore, we investigated the dynamical stability of two systems with extremely low mass ratios.
dc.description.sponsorshipNational Natural Science Foundation of China (NSFC) [12273018]
dc.description.sponsorshipQilu Young Researcher Project of Shandong University
dc.description.sponsorshipThis manuscript, including the observation, analysis, and writing processes, was provided by the BSN project (https://bsnp.info/). Work by K.L. was supported by the National Natural Science Foundation of China (NSFC) (No. 12273018) and by the Qilu Young Researcher Project of Shandong University. This paper is based on observations carried out at the Observatorio Astronomico Nacional on the Sierra San Pedro Martir, which is operated by the Universidad Nacional Autonoma de Mexico. We used IRAF, distributed by the National Optical Observatories and operated by the Association of Universities for Research in Astronomy, Inc., under a cooperative agreement with the National Science Foundation. We used data from the European Space Agency mission Gaia (http://www.cosmos.esa.int/gaia). The authors would like to express their gratitude to Dr. David Valls-Gabaud for all his help and advice.
dc.identifier.doi10.1088/1538-3873/adf1c4
dc.identifier.issn0004-6280
dc.identifier.issn1538-3873
dc.identifier.issue8
dc.identifier.scopus2-s2.0-105012960348
dc.identifier.scopusqualityQ1
dc.identifier.urihttps://doi.org/10.1088/1538-3873/adf1c4
dc.identifier.urihttps://hdl.handle.net/20.500.12428/34715
dc.identifier.volume137
dc.identifier.wosWOS:001563053200001
dc.identifier.wosqualityQ1
dc.indekslendigikaynakWeb of Science
dc.indekslendigikaynakScopus
dc.language.isoen
dc.publisherIop Publishing Ltd
dc.relation.ispartofPublications of the Astronomical Society of the Pacific
dc.relation.publicationcategoryMakale - Uluslararası Hakemli Dergi - Kurum Öğretim Elemanı
dc.rightsinfo:eu-repo/semantics/openAccess
dc.snmzKA_WOS_20260130
dc.subjectOrbital Period Modulation
dc.subjectVariable-Stars
dc.subjectEvolution
dc.subjectSystems
dc.subjectExplanation
dc.subjectStability
dc.subjectCatalog
dc.subjectPhysics
dc.subjectOrigin
dc.subjectDeep
dc.titleBSN-III: The First Multiband Photometric Study on the Eight Total Eclipse Contact Binary Stars
dc.typeArticle

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