Absolute parameters of young stars: V454 Carinae

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dc.authoridBudding, Edwin/0000-0002-7346-0177
dc.contributor.authorButland, R. J.
dc.contributor.authorErdem, A.
dc.contributor.authorOzkardes, B.
dc.contributor.authorBlackford, M. G.
dc.contributor.authorSurgit, D.
dc.contributor.authorBudding, E.
dc.contributor.authorDemircan, O.
dc.date.accessioned2025-01-27T21:04:08Z
dc.date.available2025-01-27T21:04:08Z
dc.date.issued2019
dc.departmentÇanakkale Onsekiz Mart Üniversitesi
dc.description.abstractWe present combined photometric and spectroscopic analyses of the multiple star V454 Carinae. High-resolution spectra of the system were taken at the University of Canterbury Mt. John Observatory during the years 2008-18. These have been processed using generic and purpose-built software. New digital single lens reflex photometry of the system has also been collected and similarly analysed. Absolute parameters for the three main stars confirm V454 Car's young and near-Main-Sequence nature. We find: M-1 = 4.6 +/- 0.4, M-2 = 4.4 +/- 0.4, M-3 = 4.5 +/- 0.5, R-1 = 2.83 +/- 0.18, R-2 = 2.74 +/- 0.16, R-3 = 2.78 +/- 0.16 (circle dot); T-1 similar to 17 500, T-2 similar to 15 500, T-3 similar to 15 000 (K), age similar to 30 Myr, photometric distance similar to 500 (pc). The major component V454 Car A is the close binary identified by the HIPPARCOS satellite. This binary and component B appear to be in eccentric orbits about a common centre of gravity with a period of similar to 1900 d. Analysis of the radial velocity curves suggests that the mass of component B is greater than that of its visible member. Measured radial velocities of this visible star show irregularities with a time-scale of about a week. The galactic location, proper motions, and age of V454 Car support the runaway nature proposed by others, and the combined results are consistent with a dynamical ejection scenario from the Vela region of Gould's Belt relatively soon after the stars' formation.
dc.description.sponsorshipSchool of Chemical and Physical Sciences of the Victoria University of Wellington; Royal Astronomical Society of New Zealand and its Variable Stars South section
dc.description.sponsorshipGenerous allocations of time on the lm McLellan Telescope and HERCULES spectrograph at the University of Canterbury Mt John Observatory in support of the Southern Binaries Programme have been made available through its TAC and supported by its Director, Dr. K. Pollard and previous Director, Prof. J.B. Hearnshaw. Useful help at the telescope were provided by the UCMJO management (N. Frost) assisted by F. Gunn. Considerable assistance with our application of HRSP software has been given by its author Dr. J. Skuljan. Encouragement and support for this programme has been shown by the School of Chemical and Physical Sciences of the Victoria University of Wellington, as well as the Royal Astronomical Society of New Zealand and its Variable Stars South section (http://www.va riablestarssouth.org). Further details on the photometry supporting the Southern Binaries Programme of the VSS are available from its Director Mark Blackford.
dc.identifier.doi10.1093/mnras/sty2543
dc.identifier.endpage2652
dc.identifier.issn0035-8711
dc.identifier.issn1365-2966
dc.identifier.issue2
dc.identifier.scopus2-s2.0-85071147754
dc.identifier.scopusqualityQ1
dc.identifier.startpage2644
dc.identifier.urihttps://doi.org/10.1093/mnras/sty2543
dc.identifier.urihttps://hdl.handle.net/20.500.12428/27563
dc.identifier.volume482
dc.identifier.wosWOS:000454578700085
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.subjectbinaries : close
dc.subjectstars: early type
dc.subjectstars: individual: V454 Car
dc.subjectGalaxy: stellar content
dc.titleAbsolute parameters of young stars: V454 Carinae
dc.typeArticle

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