Absolute Parameters of Detached Binaries in the Southern Sky - I: V349 Ara and V4403 Sgr

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dc.authoridEngelbrecht, Christian/0000-0001-7984-9557
dc.contributor.authorErdem, A.
dc.contributor.authorSurgit, D.
dc.contributor.authorEngelbrecht, C. A.
dc.contributor.authorVan Heerden, H. P.
dc.date.accessioned2025-01-27T20:29:21Z
dc.date.available2025-01-27T20:29:21Z
dc.date.issued2015
dc.departmentÇanakkale Onsekiz Mart Üniversitesi
dc.description.abstractWe present the first analysis of spectroscopic and photometric observations of the two southern eclipsing binary stars, V349 Ara and V4403 Sgr. Radial velocity curves of these two systems obtained at the South African Astronomical Observatory and their V light curves from the All Sky Automated Survey were solved simultaneously using the Wilson-Devinney code. Our photometric models describe these two systems as Algol-like binary stars with detached configurations. The masses and radii were found to be 2.59 +/- 0.07 M, 3.60 +/- 0.07 R and 2.51 +/- 0.06 M, 4.15 +/- 0.07 R for the primary and secondary components of V349 Ara, respectively. Those of V4403 Sgr were derived to be 1.33 +/- 0.02 M, 1.74 +/- 0.02 R and 1.59 +/- 0.03 M, 2.50 +/- 0.03 R for the primary and secondary components, respectively. The distances to V349 Ara and V4403 Sgr were computed to be 677 +/- 36 and 199 +/- 10 pc from the dynamic parallax, respectively, taking into account interstellar extinction. The evolution cases of these two systems are also examined. Both components of these two systems are evolved main-sequence stars, and the dynamic ages were estimated as approximately 0.67 and 2.29 Gyr for V349 Ara and V4403 Sgr, respectively, when compared to Geneva theoretical evolution models.
dc.description.sponsorshipSouth African National Research Foundation (NRF) [77915]; TUBITAK (Scientific and Technological Research Council of Turkey) [115F258]; University of Johannesburg (UJ); NRF; UJ
dc.description.sponsorshipThis study was partly supported by the South African National Research Foundation (NRF) for a Postdoctoral Fellowship Award, grant number 77915. It also was supported by TUBITAK (Scientific and Technological Research Council of Turkey) under grant number 115F258. D. Surgit would like to thank the University of Johannesburg (UJ) for their financial support. C.A. Engelbrecht thanks the NRF and UJ for the financial support. All the authors thank the SAAO for observing time and Rajeev Manick for his assistance during observations. We acknowledge Prof. S. Zola for his help in using the W-D fortran program with modern limb-darkening coefficients. Authors would like to thank the anonymous referee who provided valuable comments for improving the manuscript. We acknowledge also the constructive comments of Prof. E. Budding and Prof. F. Soydugan.
dc.identifier.doi10.1017/pasa.2015.27
dc.identifier.issn1323-3580
dc.identifier.issn1448-6083
dc.identifier.scopus2-s2.0-85027940532
dc.identifier.scopusqualityQ1
dc.identifier.urihttps://doi.org/10.1017/pasa.2015.27
dc.identifier.urihttps://hdl.handle.net/20.500.12428/22918
dc.identifier.volume32
dc.identifier.wosWOS:000357860500001
dc.identifier.wosqualityQ2
dc.indekslendigikaynakWeb of Science
dc.indekslendigikaynakScopus
dc.language.isoen
dc.publisherCambridge Univ Press
dc.relation.ispartofPublications of The Astronomical Society of Australia
dc.relation.publicationcategoryinfo:eu-repo/semantics/openAccess
dc.rightsinfo:eu-repo/semantics/openAccess
dc.snmzKA_WoS_20250125
dc.subjectStars: binaries: eclipsing
dc.subjectStars: binaries: spectroscopic
dc.subjectStars: evolution
dc.subjectStars: fundamental parameters
dc.subjectStars: individual: V349 Ara, V4403 Sgr
dc.titleAbsolute Parameters of Detached Binaries in the Southern Sky - I: V349 Ara and V4403 Sgr
dc.typeArticle

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