An astrometric and spectroscopic study of the ? Scuti variable HD 21190 and its wide companion CPD-83A°A 64B

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dc.authoridNiemczura, Ewa/0000-0001-7290-5800
dc.contributor.authorNiemczura, E.
dc.contributor.authorScholz, R. -D.
dc.contributor.authorHubrig, S.
dc.contributor.authorJaervinen, S. P.
dc.contributor.authorSchoeller, M.
dc.contributor.authorIlyin, I.
dc.contributor.authorAlicavus, F. Kahraman
dc.date.accessioned2025-01-27T20:41:16Z
dc.date.available2025-01-27T20:41:16Z
dc.date.issued2017
dc.departmentÇanakkale Onsekiz Mart Üniversitesi
dc.description.abstractAlthough pulsations of delta Scuti type are not expected among Ap stars from a theoretical point of view, previous observations of the known delta Scuti star HD 21190 indicated a spectral classification F2 III SrEuSi:, making it the most evolved Ap star known. Our atmospheric chemical analysis based on recent High Accuracy Radial velocity Planet Searcher observations confirms the presence of chemical peculiarities in HD 21190. This star is also the only target known to host a magnetic field along with its delta Scuti pulsation properties. Using an astrometric analysis, we show that HD 21190 forms a physical binary system with the companion CPD -83A degrees A 64B. The presented astrometric and spectroscopic study of the binary components is important to understand the complex interplay between stellar pulsations, magnetic fields and chemical composition.
dc.description.sponsorshipPolish National Science Center [2014/13/B/ST9/00902]; [214]; [097.C-0277]; [097.D-0478]
dc.description.sponsorshipEN acknowledges the Polish National Science Center grant no. 2014/13/B/ST9/00902. Calculations have been carried out at the Wroclaw Centre for Networking and Supercomputing (http://www.wcss.pl), grant No. 214. Based on observations made with ESO Telescopes at the La Silla Paranal Observatory under programme IDs 097.C-0277 and 097.D-0478.
dc.identifier.doi10.1093/mnras/stx1377
dc.identifier.endpage3818
dc.identifier.issn0035-8711
dc.identifier.issn1365-2966
dc.identifier.issue4
dc.identifier.scopus2-s2.0-85028300783
dc.identifier.scopusqualityQ1
dc.identifier.startpage3806
dc.identifier.urihttps://doi.org/10.1093/mnras/stx1377
dc.identifier.urihttps://hdl.handle.net/20.500.12428/24085
dc.identifier.volume470
dc.identifier.wosWOS:000408207600002
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/openAccess
dc.snmzKA_WoS_20250125
dc.subjectproper motions
dc.subjectstars: abundances
dc.subjectstars: atmospheres
dc.subjectstars: chemically peculiar
dc.subjectstars: distances
dc.subjectstars: individual: HD 21190, CPD-83A degrees A 64B
dc.titleAn astrometric and spectroscopic study of the ? Scuti variable HD 21190 and its wide companion CPD-83A°A 64B
dc.typeArticle

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