Nucleosynthesis during the merger of white dwarfs and the origin of R coronae borealis stars

Autores
Longland, R.; Lorén-Aguilar, P.; José, J.; García-Berro, E.; Althaus, Leandro Gabriel; Isern, J.
Año de publicación
2011
Idioma
inglés
Tipo de recurso
artículo
Estado
versión publicada
Descripción
Many hydrogen-deficient stars are characterized by surface abundance patterns that are hard to reconcile with conventional stellar evolution. Instead, it has been suggested that they may represent the result of a merger episode between a helium and a carbon-oxygen white dwarf. In this Letter, we present a nucleosynthesis study of the merger of a 0.4 M O helium white dwarf with a 0.8 M O carbon-oxygen white dwarf, by coupling the thermodynamic history of Smoothed Particle Hydrodynamics particles with a post-processing code. The resulting chemical abundance pattern, particularly for oxygen and fluorine, is in qualitative agreement with the observed abundances in R Coronae Borealis stars.
Facultad de Ciencias Astronómicas y Geofísicas
Materia
Ciencias Astronómicas
nuclear reactions, nucleosynthesis, abundances
stars: AGB and post-AGB
white dwarfs
Nivel de accesibilidad
acceso abierto
Condiciones de uso
http://creativecommons.org/licenses/by-nc-sa/4.0/
Repositorio
SEDICI (UNLP)
Institución
Universidad Nacional de La Plata
OAI Identificador
oai:sedici.unlp.edu.ar:10915/84192
Acceder
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oai_identifier_str oai:sedici.unlp.edu.ar:10915/84192
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repository_id_str 1329
network_name_str SEDICI (UNLP)
spelling Nucleosynthesis during the merger of white dwarfs and the origin of R coronae borealis starsLongland, R.Lorén-Aguilar, P.José, J.García-Berro, E.Althaus, Leandro GabrielIsern, J.Ciencias Astronómicasnuclear reactions, nucleosynthesis, abundancesstars: AGB and post-AGBwhite dwarfsMany hydrogen-deficient stars are characterized by surface abundance patterns that are hard to reconcile with conventional stellar evolution. Instead, it has been suggested that they may represent the result of a merger episode between a helium and a carbon-oxygen white dwarf. In this Letter, we present a nucleosynthesis study of the merger of a 0.4 M O helium white dwarf with a 0.8 M O carbon-oxygen white dwarf, by coupling the thermodynamic history of Smoothed Particle Hydrodynamics particles with a post-processing code. The resulting chemical abundance pattern, particularly for oxygen and fluorine, is in qualitative agreement with the observed abundances in R Coronae Borealis stars.Facultad de Ciencias Astronómicas y Geofísicas2011info:eu-repo/semantics/articleinfo:eu-repo/semantics/publishedVersionArticulohttp://purl.org/coar/resource_type/c_6501info:ar-repo/semantics/articuloapplication/pdfhttp://sedici.unlp.edu.ar/handle/10915/84192enginfo:eu-repo/semantics/altIdentifier/issn/2041-8205info:eu-repo/semantics/altIdentifier/doi/10.1088/2041-8205/737/2/L34info: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:UNLP2025-11-12T10:40:24Zoai:sedici.unlp.edu.ar:10915/84192Institucionalhttp://sedici.unlp.edu.ar/Universidad públicaNo correspondehttp://sedici.unlp.edu.ar/oai/snrdalira@sedici.unlp.edu.arArgentinaNo correspondeNo correspondeNo correspondeopendoar:13292025-11-12 10:40:24.233SEDICI (UNLP) - Universidad Nacional de La Platafalse
dc.title.none.fl_str_mv Nucleosynthesis during the merger of white dwarfs and the origin of R coronae borealis stars
title Nucleosynthesis during the merger of white dwarfs and the origin of R coronae borealis stars
spellingShingle Nucleosynthesis during the merger of white dwarfs and the origin of R coronae borealis stars
Longland, R.
Ciencias Astronómicas
nuclear reactions, nucleosynthesis, abundances
stars: AGB and post-AGB
white dwarfs
title_short Nucleosynthesis during the merger of white dwarfs and the origin of R coronae borealis stars
title_full Nucleosynthesis during the merger of white dwarfs and the origin of R coronae borealis stars
title_fullStr Nucleosynthesis during the merger of white dwarfs and the origin of R coronae borealis stars
title_full_unstemmed Nucleosynthesis during the merger of white dwarfs and the origin of R coronae borealis stars
title_sort Nucleosynthesis during the merger of white dwarfs and the origin of R coronae borealis stars
dc.creator.none.fl_str_mv Longland, R.
Lorén-Aguilar, P.
José, J.
García-Berro, E.
Althaus, Leandro Gabriel
Isern, J.
author Longland, R.
author_facet Longland, R.
Lorén-Aguilar, P.
José, J.
García-Berro, E.
Althaus, Leandro Gabriel
Isern, J.
author_role author
author2 Lorén-Aguilar, P.
José, J.
García-Berro, E.
Althaus, Leandro Gabriel
Isern, J.
author2_role author
author
author
author
author
dc.subject.none.fl_str_mv Ciencias Astronómicas
nuclear reactions, nucleosynthesis, abundances
stars: AGB and post-AGB
white dwarfs
topic Ciencias Astronómicas
nuclear reactions, nucleosynthesis, abundances
stars: AGB and post-AGB
white dwarfs
dc.description.none.fl_txt_mv Many hydrogen-deficient stars are characterized by surface abundance patterns that are hard to reconcile with conventional stellar evolution. Instead, it has been suggested that they may represent the result of a merger episode between a helium and a carbon-oxygen white dwarf. In this Letter, we present a nucleosynthesis study of the merger of a 0.4 M O helium white dwarf with a 0.8 M O carbon-oxygen white dwarf, by coupling the thermodynamic history of Smoothed Particle Hydrodynamics particles with a post-processing code. The resulting chemical abundance pattern, particularly for oxygen and fluorine, is in qualitative agreement with the observed abundances in R Coronae Borealis stars.
Facultad de Ciencias Astronómicas y Geofísicas
description Many hydrogen-deficient stars are characterized by surface abundance patterns that are hard to reconcile with conventional stellar evolution. Instead, it has been suggested that they may represent the result of a merger episode between a helium and a carbon-oxygen white dwarf. In this Letter, we present a nucleosynthesis study of the merger of a 0.4 M O helium white dwarf with a 0.8 M O carbon-oxygen white dwarf, by coupling the thermodynamic history of Smoothed Particle Hydrodynamics particles with a post-processing code. The resulting chemical abundance pattern, particularly for oxygen and fluorine, is in qualitative agreement with the observed abundances in R Coronae Borealis stars.
publishDate 2011
dc.date.none.fl_str_mv 2011
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/10915/84192
url http://sedici.unlp.edu.ar/handle/10915/84192
dc.language.none.fl_str_mv eng
language eng
dc.relation.none.fl_str_mv info:eu-repo/semantics/altIdentifier/issn/2041-8205
info:eu-repo/semantics/altIdentifier/doi/10.1088/2041-8205/737/2/L34
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
dc.source.none.fl_str_mv reponame:SEDICI (UNLP)
instname:Universidad Nacional de La Plata
instacron:UNLP
reponame_str SEDICI (UNLP)
collection SEDICI (UNLP)
instname_str Universidad Nacional de La Plata
instacron_str UNLP
institution UNLP
repository.name.fl_str_mv SEDICI (UNLP) - Universidad Nacional de La Plata
repository.mail.fl_str_mv alira@sedici.unlp.edu.ar
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score 13.24909

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