Publication:
Multiwavelength optical observations of chromospherically active binary systems III. High resolution echelle spectra from CaII H & K to CaII IRT

dc.contributor.authorMontes Gutiérrez, David
dc.contributor.authorFernández Figueroa, María José
dc.contributor.authorCastro Rubio, Elisa de
dc.contributor.authorCornide Castro-Piñeiro, Manuel
dc.contributor.authorLatorre, A.
dc.contributor.authorSanz Forcada, J.
dc.date.accessioned2023-06-20T20:07:25Z
dc.date.available2023-06-20T20:07:25Z
dc.date.issued2000-10
dc.description© 2000 EDP Sciences. We would like to thank Dr. L.W. Ramsey for collaborating in the McDonald observing run and the staff of McDonald observatory for their allocation of observing time and their assistance with our observations. We would like to thank Dr. B.H. Foing for allow us to use the ESA-MUSICOS spectrograph at Isaac Newton Telescope. We would also like to thank the referee S. Catalano for suggesting several improvements and clarifications. This work has been supported by the Universidad Complutense de Madrid and the Spanish Dirección General de Enseñanza Superior e Investigación Científica (DGESIC) under grant PB97-0259.
dc.description.abstractThis is the third paper of a series aimed at studying the chromosphere of active binary systems using the information provided for several optical spectroscopic features. High resolution echelle spectra including all the optical chromospheric activity indicators from the Ca II H & K to Ca II IRT lines are analysed here for 16 systems. The chromospheric contribution in these lines has been determined using the spectral subtraction technique. Very broad wings have been found in the subtracted H alpha profilp of the very active star HU Vir. These profiles are well matched using a two-component Gaussian fit; (narrow and broad) ard the broad component carl be interpreted as arising from microflaring. Red-shifted absorption features in the EHα line have been detected in several systems and excess emission in the blue wing of FG UMa was also detected. These features indicate that several dynamical processes, or a combination of them, may be involved. Using the EHα/EHβ ratio as a diagnostic we have detected prominence-like extended material viewed off the limb in many stars of the sample, and prominences viewed against the disk at some orbital phases in the dwarfs OU Gem and BF Lyn, The He I D_3 line has been detected as an absorption feature in mainly all the giants of the sample. Total filling-in of the He I D_3, probably due to microflaring activity, is observed in HU Vir. Self-absorption with red asymmetry is detected in the Ca II H & K lines of the giants 12 Cam: FG UMa and BM CVn. All the stars analysed show clear filled-in Ca II IRT lines or even notable emission reversal. The small values of the E_8542/E_8498 ratio we have found indicate Ca II IRT emission arises from plage-like regions. Orbital phase modulation of the chromospheric emission has been detected in some systems, in the case of HU Vir evidence of an active longitude area has been found.
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 Enseñanza Superior e Investigación Científica (DGESIC)
dc.description.sponsorshipMinisterio de Educación, Cultura y Deporte (MECD), España
dc.description.statuspub
dc.eprint.idhttps://eprints.ucm.es/id/eprint/30954
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dc.identifier.doi10.1051/aas:2000359
dc.identifier.issn0365-0138
dc.identifier.officialurlhttp://dx.doi.org/10.1051/aas:2000359
dc.identifier.relatedurlhttp://aas.aanda.org/
dc.identifier.urihttps://hdl.handle.net/20.500.14352/59610
dc.issue.number1
dc.journal.titleAstronomy & astrophysics supplement series
dc.language.isoeng
dc.page.final140
dc.page.initial103
dc.publisherEDP Sciences
dc.relation.projectIDPB97-0259
dc.rights.accessRightsopen access
dc.subject.cdu52
dc.subject.keywordRS-canum-venaticorum
dc.subject.keywordH-alpha emission
dc.subject.keywordAll-sky survey
dc.subject.keywordObjective-prism discoveries
dc.subject.keywordExtreme-ultraviolet sources
dc.subject.keywordTime-resolved spectroscopy
dc.subject.keywordShort-period systems
dc.subject.keywordCVN binaries
dc.subject.keywordUrsae majoris
dc.subject.keywordPhotometric variability
dc.subject.ucmAstrofísica
dc.subject.ucmAstronomía (Física)
dc.titleMultiwavelength optical observations of chromospherically active binary systems III. High resolution echelle spectra from CaII H & K to CaII IRT
dc.typejournal article
dc.volume.number146
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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