DQ white-dwarf stars with low C abundance: Possible progenitors
- Autores
- Scóccola, Claudia Graciela; Althaus, Leandro Gabriel; Serenelli, Aldo Marcelo; Rohrmann, René; Córsico, Alejandro Hugo
- Año de publicación
- 2006
- Idioma
- inglés
- Tipo de recurso
- artículo
- Estado
- versión publicada
- Descripción
- Aims. The present paper focuses on the evolution of hydrogen-deficient white dwarfs with the aim of exploring the consequences of different initial envelope structures on the carbon abundances expected in helium-rich, carbon-contaminated DQ white dwarfs. In particular, the evolutionary link between the DQs with low detected carbon abundances and the PG 1159, extreme horizontal branch, and helium-rich R Coronae Borealis (RCrB) stars is explored. Methods. We present full evolutionary calculations that take a self-consistent treatment of element diffusion into account as well as expectations for the outer layer chemical stratification of progenitor stars upon entering the white dwarf regime. Results. We find that PG 1159 stars cannot be related to any DQ white dwarfs with low C abundances. Instead, we suggest that the latter could constitute the progeny of the giant, helium-rich RCrB stars.
Facultad de Ciencias Astronómicas y Geofísicas - Materia
-
Ciencias Astronómicas
Stars: abundances
Stars: evolution
Stars: interiors
Stars: white dwarfs - Nivel de accesibilidad
- acceso abierto
- Condiciones de uso
- http://creativecommons.org/licenses/by-nc-sa/4.0/
- Repositorio
- Institución
- Universidad Nacional de La Plata
- OAI Identificador
- oai:sedici.unlp.edu.ar:10915/83352
Ver los metadatos del registro completo
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DQ white-dwarf stars with low C abundance: Possible progenitorsScóccola, Claudia GracielaAlthaus, Leandro GabrielSerenelli, Aldo MarceloRohrmann, RenéCórsico, Alejandro HugoCiencias AstronómicasStars: abundancesStars: evolutionStars: interiorsStars: white dwarfs<b>Aims.</b> The present paper focuses on the evolution of hydrogen-deficient white dwarfs with the aim of exploring the consequences of different initial envelope structures on the carbon abundances expected in helium-rich, carbon-contaminated DQ white dwarfs. In particular, the evolutionary link between the DQs with low detected carbon abundances and the PG 1159, extreme horizontal branch, and helium-rich R Coronae Borealis (RCrB) stars is explored. <b>Methods.</b> We present full evolutionary calculations that take a self-consistent treatment of element diffusion into account as well as expectations for the outer layer chemical stratification of progenitor stars upon entering the white dwarf regime. <b>Results.</b> We find that PG 1159 stars cannot be related to any DQ white dwarfs with low C abundances. Instead, we suggest that the latter could constitute the progeny of the giant, helium-rich RCrB stars.Facultad de Ciencias Astronómicas y Geofísicas2006info:eu-repo/semantics/articleinfo:eu-repo/semantics/publishedVersionArticulohttp://purl.org/coar/resource_type/c_6501info:ar-repo/semantics/articuloapplication/pdf147-155http://sedici.unlp.edu.ar/handle/10915/83352enginfo:eu-repo/semantics/altIdentifier/issn/0004-6361info:eu-repo/semantics/altIdentifier/doi/10.1051/0004-6361:20053769info:eu-repo/semantics/openAccesshttp://creativecommons.org/licenses/by-nc-sa/4.0/Creative Commons Attribution-NonCommercial-ShareAlike 4.0 International (CC BY-NC-SA 4.0)reponame:SEDICI (UNLP)instname:Universidad Nacional de La Platainstacron:UNLP2025-09-29T11:15:45Zoai:sedici.unlp.edu.ar:10915/83352Institucionalhttp://sedici.unlp.edu.ar/Universidad públicaNo correspondehttp://sedici.unlp.edu.ar/oai/snrdalira@sedici.unlp.edu.arArgentinaNo correspondeNo correspondeNo correspondeopendoar:13292025-09-29 11:15:46.122SEDICI (UNLP) - Universidad Nacional de La Platafalse |
dc.title.none.fl_str_mv |
DQ white-dwarf stars with low C abundance: Possible progenitors |
title |
DQ white-dwarf stars with low C abundance: Possible progenitors |
spellingShingle |
DQ white-dwarf stars with low C abundance: Possible progenitors Scóccola, Claudia Graciela Ciencias Astronómicas Stars: abundances Stars: evolution Stars: interiors Stars: white dwarfs |
title_short |
DQ white-dwarf stars with low C abundance: Possible progenitors |
title_full |
DQ white-dwarf stars with low C abundance: Possible progenitors |
title_fullStr |
DQ white-dwarf stars with low C abundance: Possible progenitors |
title_full_unstemmed |
DQ white-dwarf stars with low C abundance: Possible progenitors |
title_sort |
DQ white-dwarf stars with low C abundance: Possible progenitors |
dc.creator.none.fl_str_mv |
Scóccola, Claudia Graciela Althaus, Leandro Gabriel Serenelli, Aldo Marcelo Rohrmann, René Córsico, Alejandro Hugo |
author |
Scóccola, Claudia Graciela |
author_facet |
Scóccola, Claudia Graciela Althaus, Leandro Gabriel Serenelli, Aldo Marcelo Rohrmann, René Córsico, Alejandro Hugo |
author_role |
author |
author2 |
Althaus, Leandro Gabriel Serenelli, Aldo Marcelo Rohrmann, René Córsico, Alejandro Hugo |
author2_role |
author author author author |
dc.subject.none.fl_str_mv |
Ciencias Astronómicas Stars: abundances Stars: evolution Stars: interiors Stars: white dwarfs |
topic |
Ciencias Astronómicas Stars: abundances Stars: evolution Stars: interiors Stars: white dwarfs |
dc.description.none.fl_txt_mv |
<b>Aims.</b> The present paper focuses on the evolution of hydrogen-deficient white dwarfs with the aim of exploring the consequences of different initial envelope structures on the carbon abundances expected in helium-rich, carbon-contaminated DQ white dwarfs. In particular, the evolutionary link between the DQs with low detected carbon abundances and the PG 1159, extreme horizontal branch, and helium-rich R Coronae Borealis (RCrB) stars is explored. <b>Methods.</b> We present full evolutionary calculations that take a self-consistent treatment of element diffusion into account as well as expectations for the outer layer chemical stratification of progenitor stars upon entering the white dwarf regime. <b>Results.</b> We find that PG 1159 stars cannot be related to any DQ white dwarfs with low C abundances. Instead, we suggest that the latter could constitute the progeny of the giant, helium-rich RCrB stars. Facultad de Ciencias Astronómicas y Geofísicas |
description |
<b>Aims.</b> The present paper focuses on the evolution of hydrogen-deficient white dwarfs with the aim of exploring the consequences of different initial envelope structures on the carbon abundances expected in helium-rich, carbon-contaminated DQ white dwarfs. In particular, the evolutionary link between the DQs with low detected carbon abundances and the PG 1159, extreme horizontal branch, and helium-rich R Coronae Borealis (RCrB) stars is explored. <b>Methods.</b> We present full evolutionary calculations that take a self-consistent treatment of element diffusion into account as well as expectations for the outer layer chemical stratification of progenitor stars upon entering the white dwarf regime. <b>Results.</b> We find that PG 1159 stars cannot be related to any DQ white dwarfs with low C abundances. Instead, we suggest that the latter could constitute the progeny of the giant, helium-rich RCrB stars. |
publishDate |
2006 |
dc.date.none.fl_str_mv |
2006 |
dc.type.none.fl_str_mv |
info:eu-repo/semantics/article info:eu-repo/semantics/publishedVersion Articulo http://purl.org/coar/resource_type/c_6501 info:ar-repo/semantics/articulo |
format |
article |
status_str |
publishedVersion |
dc.identifier.none.fl_str_mv |
http://sedici.unlp.edu.ar/handle/10915/83352 |
url |
http://sedici.unlp.edu.ar/handle/10915/83352 |
dc.language.none.fl_str_mv |
eng |
language |
eng |
dc.relation.none.fl_str_mv |
info:eu-repo/semantics/altIdentifier/issn/0004-6361 info:eu-repo/semantics/altIdentifier/doi/10.1051/0004-6361:20053769 |
dc.rights.none.fl_str_mv |
info:eu-repo/semantics/openAccess http://creativecommons.org/licenses/by-nc-sa/4.0/ Creative Commons Attribution-NonCommercial-ShareAlike 4.0 International (CC BY-NC-SA 4.0) |
eu_rights_str_mv |
openAccess |
rights_invalid_str_mv |
http://creativecommons.org/licenses/by-nc-sa/4.0/ Creative Commons Attribution-NonCommercial-ShareAlike 4.0 International (CC BY-NC-SA 4.0) |
dc.format.none.fl_str_mv |
application/pdf 147-155 |
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SEDICI (UNLP) - Universidad Nacional de La Plata |
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