Comparative study of the W UMa type binaries S Ant and ? CrA

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dc.contributor.authorBakis, Volkan
dc.contributor.authorBudding, Edwin
dc.contributor.authorErdem, Ahmet
dc.contributor.authorLove, Tom
dc.contributor.authorBlackford, Mark G.
dc.contributor.authorWu, Zihao
dc.contributor.authorTang, Adam
dc.date.accessioned2025-01-27T21:02:04Z
dc.date.available2025-01-27T21:02:04Z
dc.date.issued2024
dc.departmentÇanakkale Onsekiz Mart Üniversitesi
dc.description.abstractContact binaries challenge contemporary stellar astrophysics with respect to their incidence, structure, and evolution. We explore these issues through a detailed study of two bright examples: S Ant and epsilon CrA, that permit high-resolution spectroscopy at a relatively good S/N ratio. The availability of high-quality photometry, including data from the TESS satellite as well as Gaia parallaxes, allows us to apply the Russell paradigm to produce reliable up-to-date information on the physical properties of these binaries. As a result, models of their interactive evolution, such as the thermal relaxation oscillator scenario, can be examined. Mass transfer between the components is clearly evidenced, but the variability of the O'Connell effect over relatively short-time scales points to irregularities in the mass transfer or accretion processes. Our findings indicate that S Ant may evolve into an R CMa type Algol, while the low mass ratio of epsilon CrA suggests a likely merger of its components in the not-too-distant future
dc.description.sponsorshipTUBITAK; Association of Universities for Research in Astronomy, Inc., under NASA [NAS 5-26555]
dc.description.sponsorshipGenerous allocations of time on the 1m McLennan Telescope and hercules spectrograph at the Mt John University 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 was provided by the MJUO management (N. Frost and previously A. Gilmore & P. Kilmartin). Considerable assistance with the use and development of the hrsp software was given by its author Dr. J. Skuljan, and very helpful work with initial data reduction was carried out by R. J. Butland. VB would like to thank TUBITAK for its support within the scope of the 2214 overseas PhD research project program in 2006. Observations of $\varepsilon$ CrA were made within the scope of this support. We thank the University of Queensland for the collaboration software. This paper includes data collected by the TESS mission and obtained from the MAST data archive at the Space Telescope Science Institute (STScI). STScI is operated by the Association of Universities for Research in Astronomy, Inc., under NASA contract NAS 5-26555. This research has made use of the SIMBAD database, operated at CDS, Strasbourg, France, and of NASA's Astrophysics Data System Bibliographic Services. We thank the unnamed referee for informative and helpful comments. The final version of this paper has improved significantly as a result.
dc.identifier.doi10.1017/pasa.2024.92
dc.identifier.issn1323-3580
dc.identifier.issn1448-6083
dc.identifier.scopus2-s2.0-85208747225
dc.identifier.scopusqualityQ1
dc.identifier.urihttps://doi.org/10.1017/pasa.2024.92
dc.identifier.urihttps://hdl.handle.net/20.500.12428/27272
dc.identifier.volume41
dc.identifier.wosWOS:001348314000001
dc.identifier.wosqualityN/A
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/closedAccess
dc.snmzKA_WoS_20250125
dc.subjectStars: binaries close
dc.subjectstars: WUMa type
dc.subjectstars: variable eclipsing
dc.subjectstars: individual S Ant
dc.subjectepsilon CrA
dc.titleComparative study of the W UMa type binaries S Ant and ? CrA
dc.typeArticle

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