Photometric analysis of the contact binary star V842 Hercules on the basis of seasonal light curves

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dc.contributor.authorErdem, A.
dc.contributor.authorOzkardes, B.
dc.date.accessioned2025-01-27T20:41:52Z
dc.date.available2025-01-27T20:41:52Z
dc.date.issued2009
dc.departmentÇanakkale Onsekiz Mart Üniversitesi
dc.description.abstractWe present new BVR light curves and photometric analysis of the contact binary star V842 Her. The light curves were obtained at the COMU Observatory in the consecutive years 2003, 2004. 2005, and also 2007. We studied the variation of the orbital period of the system. The O-C diagram shows a quasi-sinusoidal form superimposed on a parabola. The parabolic variation, which indicates the secular increase of the orbital period of the system, was interpreted in terms of the combined effect of mass transfer between the components of the system and mass loss by a stellar wind from the system. The sinusoidal form of the orbital period variation was considered as an apparent change and interpreted in term of the light-time effect due to an unseen component in the system. Vie have also studied the nature of asymmetries and the intrinsic variability in the light curves of the system. The differences between light levels of both maxima (i.e. O'Connell effect) and minima are changing with time. These peculiar asymmetries were explained by a dark spot on the surface of the large and more massive component star. The present BVR light curves and radial velocity curves obtained by [Rucinski, S.M., Lu, W., 1999. AJ 118, 2451] were analysed by means of the Wilson-Devinney method supplemented with a Monte Carlo type algorithm. Absolute parameters of the system were also derived. They are m(1) = 0.38 m(circle dot), m(2) = 1.45 m(circle dot), R(1) = 0.81 R(circle dot), R(2) = 1.47 R(circle dot), M(V,1) = 5(m).08 and M(V,2) = 4(m).06. (C) 2008 Elsevier B.V. All rights reserved.
dc.description.sponsorshipCanakkale Onsekiz Mart University Research Foundation
dc.description.sponsorshipWe would like to thank Drs. E. Budding, S. Zola and S. Bilir for their useful comments on this study. We also appreciate the valuable suggestions by the referee. This work was supported partly by the Canakkale Onsekiz Mart University Research Foundation.
dc.identifier.doi10.1016/j.newast.2008.10.001
dc.identifier.endpage329
dc.identifier.issn1384-1076
dc.identifier.issue3
dc.identifier.scopus2-s2.0-56949097460
dc.identifier.scopusqualityQ2
dc.identifier.startpage321
dc.identifier.urihttps://doi.org/10.1016/j.newast.2008.10.001
dc.identifier.urihttps://hdl.handle.net/20.500.12428/24256
dc.identifier.volume14
dc.identifier.wosWOS:000261990100015
dc.identifier.wosqualityQ3
dc.indekslendigikaynakWeb of Science
dc.indekslendigikaynakScopus
dc.language.isoen
dc.publisherElsevier Science Bv
dc.relation.ispartofNew Astronomy
dc.relation.publicationcategoryinfo:eu-repo/semantics/openAccess
dc.rightsinfo:eu-repo/semantics/closedAccess
dc.snmzKA_WoS_20250125
dc.subjectStars: binaries: close
dc.subjectStars: binaries: eclipsing
dc.subjectStars: individual: V842 Hercules
dc.titlePhotometric analysis of the contact binary star V842 Hercules on the basis of seasonal light curves
dc.typeArticle

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