Modelling Early-type Stars in Eclipsing Binaries of Open Clusters: A New Method for Age Determination from the Ratio of Radii

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dc.contributor.authorYildiz, M.
dc.date.accessioned2019-10-27T21:26:20Z
dc.date.available2019-10-27T21:26:20Z
dc.date.issued2011
dc.departmentEge Üniversitesien_US
dc.description.abstractBinary systems, in particular eclipsing binaries, are essential sources of knowledge of the fundamental properties of stars. The ages of binaries, members of open clusters, are constrained by their own fundamental properties and by those of the hosting cluster. The ages of eleven open clusters are here found by constructing models for the components of twelve eclipsing binaries. The difference between the ages we find and the ages of the clusters derived from isochrone fitting is up to 40%. For the binary system V497 Cep in NGC 7160, the difference is about 100%. Binary systems whose primary component is about to complete its main-sequence lifetime, such as V453 Cyg and V906 Sco, are the most suitable systems for age determination. Using model results for these stars, we derive an expression for sensitive and uncomplicated relative age determination of binary systems (age divided by the main-sequence lifetime of the primary star). The expression is given as a logarithm of radii ratio divided by a logarithm of mass ratio. Two advantages of this expression are that: (i) it is nearly independent of the assumed chemical composition of the models because of the appearance of the ratio of radii; and (ii) the ratios of radii and masses are observationally much more precise than their absolute values. We also derive another expression using luminosities rather than radii and compare results.en_US
dc.description.sponsorshipScientific and Technological Research Council of Turkey (TUBITAK)Turkiye Bilimsel ve Teknolojik Arastirma Kurumu (TUBITAK)en_US
dc.description.sponsorshipThis work is supported by the Scientific and Technological Research Council of Turkey (TUBITAK).en_US
dc.identifier.doi10.1071/AS10007
dc.identifier.endpage76en_US
dc.identifier.issn1323-3580
dc.identifier.issn1323-3580en_US
dc.identifier.issue1en_US
dc.identifier.scopusqualityN/Aen_US
dc.identifier.startpage66en_US
dc.identifier.urihttps://doi.org/10.1071/AS10007
dc.identifier.urihttps://hdl.handle.net/11454/44950
dc.identifier.volume28en_US
dc.identifier.wosWOS:000288702600007en_US
dc.identifier.wosqualityQ2en_US
dc.indekslendigikaynakWeb of Scienceen_US
dc.indekslendigikaynakScopusen_US
dc.language.isoenen_US
dc.publisherCsiro Publishingen_US
dc.relation.ispartofPublications of the Astronomical Society of Australiaen_US
dc.relation.publicationcategoryMakale - Uluslararası Hakemli Dergi - Kurum Öğretim Elemanıen_US
dc.rightsinfo:eu-repo/semantics/openAccessen_US
dc.subjectbinaries: eclipsingen_US
dc.subjectopen clustersen_US
dc.subjectstellar: interioren_US
dc.subjectstellar: evolutionen_US
dc.titleModelling Early-type Stars in Eclipsing Binaries of Open Clusters: A New Method for Age Determination from the Ratio of Radiien_US
dc.typeArticleen_US

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