Lanthanides and other spectral oddities in a Centauri: Ce III, Nd III, KrII, and broad absorption features
- Autores
- Cowley, C. R.; Hubrig, S.; Gonzalez, Jorge Federico
- Año de publicación
- 2010
- Idioma
- inglés
- Tipo de recurso
- artículo
- Estado
- versión publicada
- Descripción
- 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.
Fil: Cowley, C. R.. University Of Michigan; Estados Unidos
Fil: Hubrig, S.. AIP; Alemania
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 - Materia
-
stars:chemically peculiar
stars: variable
stars: individual: a Cen - Nivel de accesibilidad
- acceso abierto
- Condiciones de uso
- https://creativecommons.org/licenses/by-nc-sa/2.5/ar/
- Repositorio
.jpg)
- Institución
- Consejo Nacional de Investigaciones Científicas y Técnicas
- OAI Identificador
- oai:ri.conicet.gov.ar:11336/12977
Ver los metadatos del registro completo
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Lanthanides and other spectral oddities in a Centauri: Ce III, Nd III, KrII, and broad absorption featuresCowley, C. R.Hubrig, S.Gonzalez, Jorge Federicostars:chemically peculiarstars: variablestars: individual: a Cenhttps://purl.org/becyt/ford/1.3https://purl.org/becyt/ford/1Context. 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.Fil: Cowley, C. R.. University Of Michigan; Estados UnidosFil: Hubrig, S.. AIP; AlemaniaFil: 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; ArgentinaEdp Sciences2010-11info:eu-repo/semantics/articleinfo:eu-repo/semantics/publishedVersionhttp://purl.org/coar/resource_type/c_6501info:ar-repo/semantics/articuloapplication/pdfapplication/pdfhttp://hdl.handle.net/11336/12977Cowley, 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; 82-860004-6361enginfo:eu-repo/semantics/altIdentifier/doi/10.1051/0004-6361/201015492info:eu-repo/semantics/altIdentifier/url/http://www.aanda.org/articles/aa/abs/2010/15/aa15492-10/aa15492-10.htmlinfo:eu-repo/semantics/openAccesshttps://creativecommons.org/licenses/by-nc-sa/2.5/ar/reponame:CONICET Digital (CONICET)instname:Consejo Nacional de Investigaciones Científicas y Técnicas2025-10-22T11:39:18Zoai:ri.conicet.gov.ar:11336/12977instacron:CONICETInstitucionalhttp://ri.conicet.gov.ar/Organismo científico-tecnológicoNo correspondehttp://ri.conicet.gov.ar/oai/requestdasensio@conicet.gov.ar; lcarlino@conicet.gov.arArgentinaNo correspondeNo correspondeNo correspondeopendoar:34982025-10-22 11:39:18.407CONICET Digital (CONICET) - Consejo Nacional de Investigaciones Científicas y Técnicasfalse |
| dc.title.none.fl_str_mv |
Lanthanides and other spectral oddities in a Centauri: Ce III, Nd III, KrII, and broad absorption features |
| title |
Lanthanides and other spectral oddities in a Centauri: Ce III, Nd III, KrII, and broad absorption features |
| spellingShingle |
Lanthanides and other spectral oddities in a Centauri: Ce III, Nd III, KrII, and broad absorption features Cowley, C. R. stars:chemically peculiar stars: variable stars: individual: a Cen |
| title_short |
Lanthanides and other spectral oddities in a Centauri: Ce III, Nd III, KrII, and broad absorption features |
| title_full |
Lanthanides and other spectral oddities in a Centauri: Ce III, Nd III, KrII, and broad absorption features |
| title_fullStr |
Lanthanides and other spectral oddities in a Centauri: Ce III, Nd III, KrII, and broad absorption features |
| title_full_unstemmed |
Lanthanides and other spectral oddities in a Centauri: Ce III, Nd III, KrII, and broad absorption features |
| title_sort |
Lanthanides and other spectral oddities in a Centauri: Ce III, Nd III, KrII, and broad absorption features |
| dc.creator.none.fl_str_mv |
Cowley, C. R. Hubrig, S. Gonzalez, Jorge Federico |
| author |
Cowley, C. R. |
| author_facet |
Cowley, C. R. Hubrig, S. Gonzalez, Jorge Federico |
| author_role |
author |
| author2 |
Hubrig, S. Gonzalez, Jorge Federico |
| author2_role |
author author |
| dc.subject.none.fl_str_mv |
stars:chemically peculiar stars: variable stars: individual: a Cen |
| topic |
stars:chemically peculiar stars: variable stars: individual: a Cen |
| purl_subject.fl_str_mv |
https://purl.org/becyt/ford/1.3 https://purl.org/becyt/ford/1 |
| dc.description.none.fl_txt_mv |
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. Fil: Cowley, C. R.. University Of Michigan; Estados Unidos Fil: Hubrig, S.. AIP; Alemania 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 |
| description |
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. |
| publishDate |
2010 |
| dc.date.none.fl_str_mv |
2010-11 |
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info:eu-repo/semantics/article info:eu-repo/semantics/publishedVersion http://purl.org/coar/resource_type/c_6501 info:ar-repo/semantics/articulo |
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article |
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publishedVersion |
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http://hdl.handle.net/11336/12977 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 0004-6361 |
| url |
http://hdl.handle.net/11336/12977 |
| identifier_str_mv |
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 0004-6361 |
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eng |
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