Absolute parameters of young stars - II. V831 Centauri

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dc.authoridInlek, Gulay/0000-0002-4884-1437
dc.contributor.authorBudding, E.
dc.contributor.authorErdem, A.
dc.contributor.authorInlek, G.
dc.contributor.authorDemircan, O.
dc.date.accessioned2025-01-27T20:27:02Z
dc.date.available2025-01-27T20:27:02Z
dc.date.issued2010
dc.departmentÇanakkale Onsekiz Mart Üniversitesi
dc.description.abstractLiterature photometry and new high-resolution spectroscopy of V831 Cen are presented and analysed. Light and radial velocity curve fittings confirm the central pair of this young multiple system to be close to contact. Absolute parameters are found as follows: M-1 = 4.08 +/- 0.07 M-circle dot, M-2 = 3.35 +/- 0.06 M-circle dot, R-1 = 2.38 +/- 0.03 R-circle dot, R-2 = 2.25 +/- 0.03 R-circle dot, T-1 = 13 000 +/- 300 K, T-2 = 11 800 +/- 300 K; distance of 110 +/- 10 pc and age of similar to 20 +/- 5 Myr. Detailed examination of the spectrograms indicates the third component (V831 Cen B) to be an Ap star. The orbit of the third star about the close binary is analysed using historic astrometric measurements. This allows an estimate of the third star's mass to be about 2.5 M-circle dot, but this is sensitive to the adopted distance and inclination values. It is, however, confirmed by the measured radial velocity of the third star. To some extent, such analysis can also be applied to the fourth star (V831 Cen C). The derived properties can be checked against the system's membership of the Scorpius-Centaurus OB2 association.
dc.description.sponsorshipTurkish Science Research Council (TUBITAK); National Observatory of New Zealand
dc.description.sponsorshipThe authors are very appreciative of the provision of the seven-colour Geneva photometry by Dr G. Burki of the University of Geneva, intermediated by Dr C. Waelkens of the Leuven Observatory. We greatly appreciate the financial support of the Turkish Science Research Council (TUBITAK) in partial support of this programme, as well as the Carter National Observatory of New Zealand. The Observatory's former Manager (J. Marchand) and former Senior Astronomer (B. Carter) provided well-received hospitality and encouragement.
dc.identifier.doi10.1111/j.1365-2966.2010.16209.x
dc.identifier.endpage1456
dc.identifier.issn0035-8711
dc.identifier.issn1365-2966
dc.identifier.issue3
dc.identifier.startpage1448
dc.identifier.urihttps://doi.org/10.1111/j.1365-2966.2010.16209.x
dc.identifier.urihttps://hdl.handle.net/20.500.12428/22557
dc.identifier.volume403
dc.identifier.wosWOS:000276247500029
dc.identifier.wosqualityQ1
dc.indekslendigikaynakWeb of Science
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/openAccess
dc.snmzKA_WoS_20250125
dc.subjectmethods: data analysis
dc.subjectbinaries: close
dc.subjectstars: early-type
dc.subjectstars: individual: V831 Cen
dc.subjectGalaxy: stellar content
dc.titleAbsolute parameters of young stars - II. V831 Centauri
dc.typeArticle

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