BSN. II. The First Light Curve Study of Eight Total Eclipsing Contact Binary Stars with Shallow Fillout Factors

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dc.authorid0000-0002-0196-9732
dc.authorid0009-0005-0485-418X
dc.authorid0000-0003-3590-335X
dc.authorid0000-0002-7348-8815
dc.authorid0000-0003-3283-0407
dc.authorid0000-0003-1263-808X
dc.contributor.authorPoro, Atila
dc.contributor.authorLi, Kai
dc.contributor.authorMichel, Raul
dc.contributor.authorWang, Li-Heng
dc.contributor.authorAlicavus, Fahri
dc.contributor.authorNajera, Morgan Rhai
dc.contributor.authorSantillan-Ortega, Priscila
dc.date.accessioned2026-02-03T11:59:47Z
dc.date.available2026-02-03T11:59:47Z
dc.date.issued2025
dc.departmentÇanakkale Onsekiz Mart Üniversitesi
dc.description.abstractThis study provides the first comprehensive analysis of eight total-eclipse W Ursae Majoris-type contact binary systems. Ground-based photometric multiband observations were conducted at a Mexican observatory, and new times of minima were extracted. The O-C analysis reveals that four of our target binaries exhibit a long-term increase in their orbital periods, while the others show a long-term decrease in their orbital periods. We analyzed the light curves using the PHOEBE Python code and BSN application. Among the target systems, two required the inclusion of a cold starspot on one of the components to achieve an adequate fit. The light curve analysis revealed that the target systems exhibit a shallow fillout factor. Absolute parameters were estimated using the Gaia DR3 parallax and astrophysics equations. Considering the effective temperatures and component masses, each system was classified as either the A- or W-subtype. The stellar evolution of the systems was represented through the mass-radius and mass-luminosity diagrams. Additionally, we calculated the initial masses of the companion stars and the total mass lost for each target system.
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.doi10.3847/1538-3881/adfc57
dc.identifier.issn0004-6256
dc.identifier.issn1538-3881
dc.identifier.issue4
dc.identifier.scopus2-s2.0-105015745385
dc.identifier.scopusqualityQ1
dc.identifier.urihttps://doi.org/10.3847/1538-3881/adfc57
dc.identifier.urihttps://hdl.handle.net/20.500.12428/34418
dc.identifier.volume170
dc.identifier.wosWOS:001569039800001
dc.identifier.wosqualityQ1
dc.indekslendigikaynakWeb of Science
dc.indekslendigikaynakScopus
dc.language.isoen
dc.publisherIop Publishing Ltd
dc.relation.ispartofAstronomical Journal
dc.relation.publicationcategoryMakale - Uluslararası Hakemli Dergi - Kurum Öğretim Elemanı
dc.rightsinfo:eu-repo/semantics/openAccess
dc.snmzKA_WOS_20260130
dc.subjectEvolutionary Status
dc.subjectDetached Binaries
dc.subjectCatalog
dc.subjectSystems
dc.subjectSky
dc.subjectClassification
dc.subjectVariability
dc.subjectNorthern
dc.subjectPhysics
dc.titleBSN. II. The First Light Curve Study of Eight Total Eclipsing Contact Binary Stars with Shallow Fillout Factors
dc.typeArticle

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