Investigation of near-contact semi-detached binary WUMi through observations and evolutionary models

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dc.authoridSoydugan, Faruk/0000-0002-5141-7645
dc.contributor.authorSoydugan, Faruk
dc.contributor.authorSoydugan, Esin
dc.contributor.authorAlicavus, Fahri
dc.date.accessioned2025-01-27T20:12:10Z
dc.date.available2025-01-27T20:12:10Z
dc.date.issued2020
dc.departmentÇanakkale Onsekiz Mart Üniversitesi
dc.description.abstractW UMi is a near contact, semi-detached, double-lined eclipsing binary star with an orbital period of 1.7 d. Simultaneous analysis of new BV R multi-color light curves and radial velocity data yields the main astrophysical parameters of the binary and its component stars. We determined mass and radius to be M-1 = 3.22 +/- 0.08 M-circle dot, R-1 = 3.63 +/- 0.04 R-circle dot for the primary star and M-2 = 1.44 +/- 0.05 M-circle dot, R-2 = 3.09 +/- 0.03 R-circle dot for the secondary star. Based on analysis of mid-eclipse times, variation in the orbital period is represented by a cyclic term and a downward parabola. Mass loss from the system is suggested for a secular decrease (-0.02 s yr(-1)) in the period. Both the mechanisms of a hypothetical tertiary star orbiting around W UMi and the surface magnetic activity of the less massive cooler companion were used to interpret periodic changes. Observational parameters were found to be consistent with binary stellar evolution models produced in the non-conservative approach of MESA at a higher metallicity than the Sun and an age of about 400 Myr for the system. Evidence that the system is rich in metal was obtained from spectral and kinematic analysis as well as evolution models. W UMi, a high mass ratio system compared to classical semi-detached binaries, is an important example since it is estimated from binary evolutionary models that the system may reach its contact phase in a short time interval.
dc.description.sponsorshipCanakkale Onsekiz Mart University, the Scientific Research Coordination Unit [FBA-20182549]; TUBITAK (Scientific and Technological Research Council of Turkey) [111T224]
dc.description.sponsorshipThis work was supported by Canakkale Onsekiz Mart University, the Scientific Research Coordination Unit, Project number: FBA-20182549 and also partly supported by TUBITAK (Scientific and Technological Research Council of Turkey) under Grant No. 111T224. The authors wish to thank the all staff of the Catania Astrophysical Observatory for the allocation of telescope time and help during observations. This research made use of VizieR and SIMBAD databases at CDS, Strasbourg, France. We are grateful to Dr. Jang-Ho Park for providing us with spectral data on the system. This work has made use of data from the European Space Agency (ESA) mission Gaia (https://www.cosmos.esa.int/gaia), processed by the Gaia Data Processing and Analysis Consortium (DPAC, https://www.cosmos.esa.int/web/gaia/dpac/consortium).Funding for the DPAC has been provided by national institutions, in particular the institutions participating in the Gaia Multilateral Agreement.
dc.identifier.doi10.1088/1674-4527/20/4/52
dc.identifier.issn1674-4527
dc.identifier.issn2397-6209
dc.identifier.issue4
dc.identifier.scopus2-s2.0-85085643966
dc.identifier.scopusqualityQ2
dc.identifier.urihttps://doi.org/10.1088/1674-4527/20/4/52
dc.identifier.urihttps://hdl.handle.net/20.500.12428/20865
dc.identifier.volume20
dc.identifier.wosWOS:000529929900001
dc.identifier.wosqualityQ3
dc.indekslendigikaynakWeb of Science
dc.indekslendigikaynakScopus
dc.language.isoen
dc.publisherNatl Astronomical Observatories, Chin Acad Sciences
dc.relation.ispartofResearch in Astronomy and Astrophysics
dc.relation.publicationcategoryinfo:eu-repo/semantics/openAccess
dc.rightsinfo:eu-repo/semantics/openAccess
dc.snmzKA_WoS_20250125
dc.subjectbinaries
dc.subjecteclipsing
dc.subjectstars
dc.subjectfundamental parameters
dc.subjectstars
dc.subjectevolution
dc.subjectstars
dc.subjectindividual
dc.subjectW UMi
dc.titleInvestigation of near-contact semi-detached binary WUMi through observations and evolutionary models
dc.typeArticle

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