STUDY OF ECLIPSING BINARY AND MULTIPLE SYSTEMS IN OB ASSOCIATIONS. II. THE CYGNUS OB REGION: V443 Cyg, V456 Cyg, AND V2107 Cyg

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dc.authoridBAKIS, VOLKAN/0000-0002-3125-9010
dc.authoridBilir, Selcuk/0000-0003-3510-1509
dc.contributor.authorBakis, V.
dc.contributor.authorHensberge, H.
dc.contributor.authorBilir, S.
dc.contributor.authorBakis, H.
dc.contributor.authorYilmaz, F.
dc.contributor.authorKiran, E.
dc.contributor.authorDemircan, O.
dc.date.accessioned2025-01-27T20:58:13Z
dc.date.available2025-01-27T20:58:13Z
dc.date.issued2014
dc.departmentÇanakkale Onsekiz Mart Üniversitesi
dc.description.abstractThree presumably young eclipsing binary systems in the direction of the Cygnus OB1, OB3, and OB9 associations are studied. Component spectra are reconstructed and their orbits are determined using light curves and spectra disentangling techniques. V443 Cyg and V456 Cyg have circular orbits while the light curve of V2107 Cyg imposes a slightly eccentric orbit (e = 0.045 +/- 0.03). V443 Cyg harbors F-type stars, not young early-A stars as previously suggested in the literature based solely on photometry. It appears to be situated in the foreground (distance 0.6 +/- 0.2 kpc) of the young stellar populations in Cygnus. V456 Cyg, at a distance of 0.50 +/- 0.03 kpc, consists of a slightly metal-weak A-type star and an early-F star. The age of both systems, on or very near to the main sequence, remains uncertain by an order of magnitude. V2107 Cyg is a more massive system (8.9 +/- 2 and 4.5 +/- 1.2M(circle dot)) at 1.5 +/- 0.5 kpc and, also kinematically, a strong candidate-member of Cyg OB1. The more massive component is slightly evolved and appears to undergo non-radial beta Cep-type pulsations. The Doppler signal of the secondary is barely detectable. A more extensive, asteroseismological study is necessary to fix masses more precisely. Nevertheless, the position of the primary in the H-R diagram confines the age reasonably well to 20 +/- 5 Myr, indicating that for Cyg OB1 has a similar extent of star formation history as that established for Cyg OB2.
dc.description.sponsorshipScientific and Technological Research Council (TUBITAK) of Turkey [109T449]; TUBITAK National Observatory [10BRTT150-30-0]; Ulupinar Observatory of Canakkale Onsekiz Mart University; Fund for Scientific Research of Flanders (FWO), Belgium; Research Council of K.U. Leuven, Belgium; Fonds National Recherches Scientific (FNRS), Belgium; Royal Observatory of Belgium; Observatoire de Geneve, Switzerland; Thringer Landessternwarte Tautenburg, Germany; UVES Paranal Observatory project [266.D-5655]
dc.description.sponsorshipThis work is fully supported by the Scientific and Technological Research Council (TUBITAK) of Turkey under project code 109T449. The spectroscopic observations are granted by the TUBITAK National Observatory with project code 10BRTT150-30-0. The photometric observations are granted by Ulupinar Observatory of Canakkale Onsekiz Mart University. Part of the spectroscopic observations of V2107 Cyg is based on observations obtained with the HERMES spectrograph, which is supported by the Fund for Scientific Research of Flanders (FWO), Belgium; the Research Council of K.U. Leuven, Belgium; the Fonds National Recherches Scientific (FNRS), Belgium; the Royal Observatory of Belgium; the Observatoire de Geneve, Switzerland; and the Thringer Landessternwarte Tautenburg, Germany. We thank the observers Ben Devries, Yves Fremat, Marie Hrudkova, and Peter Papics. This research made use of SIMBAD and ALADIN. We made use of data from the UVES Paranal Observatory project (ESO DDT Program ID 266.D-5655).
dc.identifier.doi10.1088/0004-6256/147/6/149
dc.identifier.issn0004-6256
dc.identifier.issn1538-3881
dc.identifier.issue6
dc.identifier.scopus2-s2.0-84900834636
dc.identifier.scopusqualityQ1
dc.identifier.urihttps://doi.org/10.1088/0004-6256/147/6/149
dc.identifier.urihttps://hdl.handle.net/20.500.12428/26646
dc.identifier.volume147
dc.identifier.wosWOS:000336262600025
dc.identifier.wosqualityQ2
dc.indekslendigikaynakWeb of Science
dc.indekslendigikaynakScopus
dc.language.isoen
dc.publisherIop Publishing Ltd
dc.relation.ispartofAstronomical Journal
dc.relation.publicationcategoryinfo:eu-repo/semantics/openAccess
dc.rightsinfo:eu-repo/semantics/openAccess
dc.snmzKA_WoS_20250125
dc.subjectbinaries: eclipsing
dc.subjectstars: distances
dc.subjectstars: fundamental parameters
dc.titleSTUDY OF ECLIPSING BINARY AND MULTIPLE SYSTEMS IN OB ASSOCIATIONS. II. THE CYGNUS OB REGION: V443 Cyg, V456 Cyg, AND V2107 Cyg
dc.typeArticle

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