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dc.contributor.author
Cowley, C. R.
dc.contributor.author
Hubrig, S.
dc.contributor.author
Gonzalez, Jorge Federico
dc.date.available
2017-02-14T16:00:08Z
dc.date.issued
2010-11
dc.identifier.citation
Cowley, C. R.; Hubrig, S.; Gonzalez, Jorge Federico; Lanthanides and other spectral oddities in a Centauri: Ce III, Nd III, KrII, and broad absorption features; Edp Sciences; Astronomy And Astrophysics; 523; 11-2010; 82-86
dc.identifier.issn
0004-6361
dc.identifier.uri
http://hdl.handle.net/11336/12977
dc.description.abstract
Context. There is considerable interest in the helium variable a Cen as a bridge between helium-weak and helium-strong CP stars.
Aims. We investigate Ce iii and other possible lanthanides in the spectrum the of hottest chemically peculiar (CP) star in which these elements have been found. A Kr ii line appears within a broad absorption which we suggest may be due to a high-level transition in C ii.
Methods. Wavelengths and equivalent widths are measured on high-resolution UVES spectra, analyzed, and their phase-variations investigated.
Results. New, robust identifications of Ce iii and Kr ii are demonstrated. Nd iii is likely present. A broad absorption near λ4619 is present at all phases of a Cen, and in some other early B stars.
Conclusions. The presence of lanthanides in a Cen strengthens the view that this star is a significant link between the cooler CP stars and the hotter helium-peculiar stars. Broad absorptions in a Cen are not well explained.
dc.format
application/pdf
dc.language.iso
eng
dc.publisher
Edp Sciences
dc.rights
info:eu-repo/semantics/openAccess
dc.rights.uri
https://creativecommons.org/licenses/by-nc-sa/2.5/ar/
dc.subject
Stars:Chemically Peculiar
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Stars: Variable
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Stars: Individual: a Cen
dc.subject.classification
Astronomía
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Ciencias Físicas
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CIENCIAS NATURALES Y EXACTAS
dc.title
Lanthanides and other spectral oddities in a Centauri: Ce III, Nd III, KrII, and broad absorption features
dc.type
info:eu-repo/semantics/article
dc.type
info:ar-repo/semantics/artículo
dc.type
info:eu-repo/semantics/publishedVersion
dc.date.updated
2017-02-13T20:30:27Z
dc.journal.volume
523
dc.journal.pagination
82-86
dc.journal.pais
Francia
dc.journal.ciudad
Les Ulis
dc.description.fil
Fil: Cowley, C. R.. University Of Michigan; Estados Unidos
dc.description.fil
Fil: Hubrig, S.. AIP; Alemania
dc.description.fil
Fil: Gonzalez, Jorge Federico. Consejo Nacional de Investigaciones Cientificas y Tecnicas. Centro Cientifico Tecnologico San Juan. Instituto de Ciencias Astronomicas de la Tierra y del Espacio; Argentina
dc.journal.title
Astronomy And Astrophysics
dc.relation.alternativeid
info:eu-repo/semantics/altIdentifier/doi/http://dx.doi.org/10.1051/0004-6361/201015492
dc.relation.alternativeid
info:eu-repo/semantics/altIdentifier/url/http://www.aanda.org/articles/aa/abs/2010/15/aa15492-10/aa15492-10.html
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