Absolute parameters of three southern eclipsing binaries: DQ Car, BK Ind, and V4396 Sgr

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dc.contributor.authorSurgit, Derya
dc.contributor.authorErdem, Ahmet
dc.contributor.authorEngelbrecht, Chris A.
dc.contributor.authorMarang, Fred
dc.date.accessioned2025-01-27T20:51:52Z
dc.date.available2025-01-27T20:51:52Z
dc.date.issued2020
dc.departmentÇanakkale Onsekiz Mart Üniversitesi
dc.description.abstractWe present combined photometric and spectroscopic analyses of the three southern eclipsing binary stars: DQ Car, BK Ind, and V4396 Sgr. Radial velocity curves of these three systems were obtained at the South African Astronomical Observatory, and their light curves from the available data bases and surveys were used for the analysis. 75 new times of minima for these three eclipsing binaries were derived, and their ephemerides were updated. Only the O-C diagram of DQ Car indicates a cyclical variation, which was interpreted in terms of the light-time effect due to a third body in the system. Our final models describe these three systems as Algol-like binary stars with detached configurations. The masses and radii were found to be M-1 = 1.86(+/- 0.17) M-circle dot, R-1 = 1.63(+/- 0.06) R-circle dot and M-2 = 1.74(+/- 0.17) M-circle dot, R-2 = 1.52(+/- 0.07) R-circle dot for the primary and secondary components of DQ Car; M-1 = 1.16(+/- 0.05) M-circle dot, R-1 = 1.33(+/- 0.03) R-circle dot and M-1 = 0.98(+/- 0.04) M-circle dot, R-2 = 1.00(+/- 0.03) R-circle dot for BK Ind; and M-1 = 3.14(+/- 0.22) M-circle dot, R-1 = 3.00(+/- 0.09) R-circle dot and M-2 = 3.13(+/- 0.24) M-circle dot, R-2 = 2.40(+/- 0.08) R-circle dot for V4396 Sgr, respectively. The distances to DQ Car, BK Ind, and V4396 Sgr were derived to be 701(+/- 50), 285(+/- 20), and 414(+/- 30) pc from the distance modulus formula, taking into account interstellar extinction. The evolutionary status of these three systems was also studied. It has been found that the components of DQ Car arc very young stars at the age of similar to 25 Myr and those of BK Ind and V4396 Sgr are evolved main-sequence stars at the ages of similar to 2.69 Gyr and similar to 204 Myr, respectively.
dc.description.sponsorshipScientific Research Project Coordination Unit of Canakkale Onsekiz Mart University [FHD-20182600]; University of Johannesburg (UJ); South African National Research Foundation; UJ
dc.description.sponsorshipThe authors appreciate the valuable suggestions given by the reviewer for improving the overall quality of the paper. This research was supported by the Scientific Research Project Coordination Unit of C comma anakkale Onsekiz Mart University (Project No. FHD-20182600). DS would like to thank the University of Johannesburg (UJ) for their financial support. CAE thanks the South African National Research Foundation and UJ for financial support. All the authors thank the SAAO for observing time. This research is partly based on data from the OMC Archive at CAB (INTA-CSIC), pre-processed by ISDC. The authors thank the ASAS, ASAS-SN, APASS, Bochum GDS, CRTS, HIPPARCOS, OMC, and KWS teams for making all of the observations easily public available. This research has made use of the SIMBAD data base, operated at CDS, Strasbourg, France, and ofNASA's AstrophysicsData System Bibliographic Services.
dc.identifier.doi10.1093/mnras/staa438
dc.identifier.endpage2675
dc.identifier.issn0035-8711
dc.identifier.issn1365-2966
dc.identifier.issue2
dc.identifier.scopus2-s2.0-85099744564
dc.identifier.scopusqualityQ1
dc.identifier.startpage2659
dc.identifier.urihttps://doi.org/10.1093/mnras/staa438
dc.identifier.urihttps://hdl.handle.net/20.500.12428/25555
dc.identifier.volume493
dc.identifier.wosWOS:000525996700084
dc.identifier.wosqualityQ1
dc.indekslendigikaynakWeb of Science
dc.indekslendigikaynakScopus
dc.language.isoen
dc.publisherOxford Univ Press
dc.relation.ispartofMonthly Notices of The Royal Astronomical Society
dc.relation.publicationcategoryinfo:eu-repo/semantics/openAccess
dc.rightsinfo:eu-repo/semantics/closedAccess
dc.snmzKA_WoS_20250125
dc.subject(stars:) binaries: eclipsing
dc.subjectstars: fundamental parameters
dc.subjectstars: individual (DQ Car)
dc.subjectstars: individual (BK Ind)
dc.subjectstars: individual (V4396 Sgr)
dc.titleAbsolute parameters of three southern eclipsing binaries: DQ Car, BK Ind, and V4396 Sgr
dc.typeArticle

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