Application of the spectral subtraction technique to the Ca II H & K and H_ε lines in a sample of chromospherically active binaries

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dc.contributor.authorMontes Gutiérrez, David
dc.contributor.authorCastro Rubio, Elisa de
dc.contributor.authorFernández Figueroa, María José
dc.contributor.authorCornide Castro-Piñeiro, Manuel
dc.date.accessioned2023-06-20T20:08:35Z
dc.date.available2023-06-20T20:08:35Z
dc.date.issued1995-12
dc.description© 1995 EDP Sciences. This work has been supported by the Universidad Complutense de Madrid and the Spanish Dirección General de Investigación Científica y Técnica (DGICYT) under grant PB91-0348. We would like to thank the referee K.G. Strassmeier for suggesting several improvements and clarifications.
dc.description.abstractWe present new spectroscopic observations in the Ca II H & K line region for a sample of 28 chromospherically active binary systems (RS CVn and BY Dra classes), with different activity levels. By using the spectral subtraction technique (subtraction of a synthesized stellar spectrum constructed from reference stars of similar spectral type and luminosity class) we obtain the active-chromosphere contribution to the Ca II H & K lines and to the H_ε line when it is present. We have compared the emission equivalent widths obtained with this technique with those obtained by reconstruction of the absorption line profile below the emission peak(s). The emissions arising from each individual star were obtained when it was possible to deblend the contribution of both components. The Ca II line profiles corresponding to different seasons and orbital phases are analysed in order to determine the contribution of each component and to study the chromospheric activity variations.
dc.description.departmentDepto. de Física de la Tierra y Astrofísica
dc.description.facultyFac. de Ciencias Físicas
dc.description.refereedTRUE
dc.description.sponsorshipUniversidad Complutense de Madrid (UCM)
dc.description.sponsorshipDirección General de Investigación Científica y Técnica (DGICYT), España
dc.description.sponsorshipMinisterio de Economía y Competitividad (MINECO), España
dc.description.statuspub
dc.eprint.idhttps://eprints.ucm.es/id/eprint/31330
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dc.identifier.issn0365-0138
dc.identifier.officialurlhttp://arxiv.org/pdf/astro-ph/9506025v1.pdf
dc.identifier.relatedurlhttp://aas.aanda.org/
dc.identifier.urihttps://hdl.handle.net/20.500.14352/59662
dc.issue.number2
dc.journal.titleAstronomy & astrophysics supplement series
dc.language.isoeng
dc.page.final323
dc.page.initial287
dc.publisherEDP Sciences
dc.relation.projectIDPB91-0348
dc.rights.accessRightsopen access
dc.subject.cdu52
dc.subject.keywordLate-type stars
dc.subject.keywordMain-sequence stars
dc.subject.keywordSolar-type stars
dc.subject.keywordRS-CVN system
dc.subject.keywordAlpha emission
dc.subject.keywordDraconis variables
dc.subject.keywordProfiles
dc.subject.keywordCatalog
dc.subject.keywordDiscovery
dc.subject.ucmAstrofísica
dc.subject.ucmAstronomía (Física)
dc.titleApplication of the spectral subtraction technique to the Ca II H & K and H_ε lines in a sample of chromospherically active binaries
dc.typejournal article
dc.volume.number114
dspace.entity.typePublication
relation.isAuthorOfPublication2dfe4286-12c7-4d3a-bfda-d298a90cc8fe
relation.isAuthorOfPublication69d74cdf-f618-484d-b812-aabbd99a993c
relation.isAuthorOfPublication7fb65e4f-6cd8-40f1-88c3-23f46fc271af
relation.isAuthorOfPublication.latestForDiscovery2dfe4286-12c7-4d3a-bfda-d298a90cc8fe
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