Evolution and colors of helium-core white dwarfs stars with high-metallicity progenitors
- Autores
- Althaus, Leandro Gabriel; Panei, Jorge Alejandro; Romero, Alejandra Daniela; Rohrmann, René; Córsico, Alejandro Hugo; García Berro, Enrique; Miller Bertolami, Marcelo Miguel
- Año de publicación
- 2009
- Idioma
- inglés
- Tipo de recurso
- artículo
- Estado
- versión publicada
- Descripción
- Aims. Motivated by the recent detection of single and binary He-core white dwarfs in metal-rich clusters, we present a full set of evolutionary calculations and colors appropriate to the study of these white dwarfs. The paper is also aimed at investigating whether stable hydrogen burning may constitute a major source of energy for massive He-core white dwarfs resulting from high-metallicity progenitors. Methods. White dwarf sequences are derived by considering the evolutionary history of progenitor stars with supersolar metallicities. We also incorporate a self-consistent, time-dependent treatment of gravitational settling and chemical diffusion, as well as of the residual nuclear burning. Results. We find that the influence of residual nuclear burning during the late stages of white dwarf evolution is strongly dependent on the chemical diffusion at the base of the hydrogen-rich envelope. When no diffusion is considered, residual hydrogen burning strongly influences the advanced stages of white dwarf cooling, introducing evolutionary delays of several Gyr. By contrast, when diffusion is taken into account, the role of residual nuclear burning is strongly mitigated, and the evolution is only dictated by the thermal content stored in the ions. In addition, for all of our sequences, we provide accurate color and magnitudes on the basis of new and improved non-gray model atmospheres that explicitly include Lyα quasi-molecular opacity
Instituto de Astrofísica de La Plata - Materia
-
Ciencias Astronómicas
Evolution of stars
White dwarfs
Clusters
Galaxies - 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:10915/93542
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Evolution and colors of helium-core white dwarfs stars with high-metallicity progenitorsAlthaus, Leandro GabrielPanei, Jorge AlejandroRomero, Alejandra DanielaRohrmann, RenéCórsico, Alejandro HugoGarcía Berro, EnriqueMiller Bertolami, Marcelo MiguelCiencias AstronómicasEvolution of starsWhite dwarfsClustersGalaxiesAims. Motivated by the recent detection of single and binary He-core white dwarfs in metal-rich clusters, we present a full set of evolutionary calculations and colors appropriate to the study of these white dwarfs. The paper is also aimed at investigating whether stable hydrogen burning may constitute a major source of energy for massive He-core white dwarfs resulting from high-metallicity progenitors. Methods. White dwarf sequences are derived by considering the evolutionary history of progenitor stars with supersolar metallicities. We also incorporate a self-consistent, time-dependent treatment of gravitational settling and chemical diffusion, as well as of the residual nuclear burning. Results. We find that the influence of residual nuclear burning during the late stages of white dwarf evolution is strongly dependent on the chemical diffusion at the base of the hydrogen-rich envelope. When no diffusion is considered, residual hydrogen burning strongly influences the advanced stages of white dwarf cooling, introducing evolutionary delays of several Gyr. By contrast, when diffusion is taken into account, the role of residual nuclear burning is strongly mitigated, and the evolution is only dictated by the thermal content stored in the ions. In addition, for all of our sequences, we provide accurate color and magnitudes on the basis of new and improved non-gray model atmospheres that explicitly include Lyα quasi-molecular opacityInstituto de Astrofísica de La Plata2009-12info:eu-repo/semantics/articleinfo:eu-repo/semantics/publishedVersionArticulohttp://purl.org/coar/resource_type/c_6501info:ar-repo/semantics/articuloapplication/pdf207-216http://sedici.unlp.edu.ar/handle/10915/93542enginfo:eu-repo/semantics/altIdentifier/url/https://www.aanda.org/articles/aa/abs/2009/28/aa11640-09/aa11640-09.htmlinfo:eu-repo/semantics/altIdentifier/issn/0004-6361info:eu-repo/semantics/altIdentifier/doi/10.1051/0004-6361/200911640info:eu-repo/semantics/altIdentifier/hdl/11336/45998info: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:UNLP2025-09-29T11:19:26Zoai:sedici.unlp.edu.ar:10915/93542Institucionalhttp://sedici.unlp.edu.ar/Universidad públicaNo correspondehttp://sedici.unlp.edu.ar/oai/snrdalira@sedici.unlp.edu.arArgentinaNo correspondeNo correspondeNo correspondeopendoar:13292025-09-29 11:19:27.139SEDICI (UNLP) - Universidad Nacional de La Platafalse |
dc.title.none.fl_str_mv |
Evolution and colors of helium-core white dwarfs stars with high-metallicity progenitors |
title |
Evolution and colors of helium-core white dwarfs stars with high-metallicity progenitors |
spellingShingle |
Evolution and colors of helium-core white dwarfs stars with high-metallicity progenitors Althaus, Leandro Gabriel Ciencias Astronómicas Evolution of stars White dwarfs Clusters Galaxies |
title_short |
Evolution and colors of helium-core white dwarfs stars with high-metallicity progenitors |
title_full |
Evolution and colors of helium-core white dwarfs stars with high-metallicity progenitors |
title_fullStr |
Evolution and colors of helium-core white dwarfs stars with high-metallicity progenitors |
title_full_unstemmed |
Evolution and colors of helium-core white dwarfs stars with high-metallicity progenitors |
title_sort |
Evolution and colors of helium-core white dwarfs stars with high-metallicity progenitors |
dc.creator.none.fl_str_mv |
Althaus, Leandro Gabriel Panei, Jorge Alejandro Romero, Alejandra Daniela Rohrmann, René Córsico, Alejandro Hugo García Berro, Enrique Miller Bertolami, Marcelo Miguel |
author |
Althaus, Leandro Gabriel |
author_facet |
Althaus, Leandro Gabriel Panei, Jorge Alejandro Romero, Alejandra Daniela Rohrmann, René Córsico, Alejandro Hugo García Berro, Enrique Miller Bertolami, Marcelo Miguel |
author_role |
author |
author2 |
Panei, Jorge Alejandro Romero, Alejandra Daniela Rohrmann, René Córsico, Alejandro Hugo García Berro, Enrique Miller Bertolami, Marcelo Miguel |
author2_role |
author author author author author author |
dc.subject.none.fl_str_mv |
Ciencias Astronómicas Evolution of stars White dwarfs Clusters Galaxies |
topic |
Ciencias Astronómicas Evolution of stars White dwarfs Clusters Galaxies |
dc.description.none.fl_txt_mv |
Aims. Motivated by the recent detection of single and binary He-core white dwarfs in metal-rich clusters, we present a full set of evolutionary calculations and colors appropriate to the study of these white dwarfs. The paper is also aimed at investigating whether stable hydrogen burning may constitute a major source of energy for massive He-core white dwarfs resulting from high-metallicity progenitors. Methods. White dwarf sequences are derived by considering the evolutionary history of progenitor stars with supersolar metallicities. We also incorporate a self-consistent, time-dependent treatment of gravitational settling and chemical diffusion, as well as of the residual nuclear burning. Results. We find that the influence of residual nuclear burning during the late stages of white dwarf evolution is strongly dependent on the chemical diffusion at the base of the hydrogen-rich envelope. When no diffusion is considered, residual hydrogen burning strongly influences the advanced stages of white dwarf cooling, introducing evolutionary delays of several Gyr. By contrast, when diffusion is taken into account, the role of residual nuclear burning is strongly mitigated, and the evolution is only dictated by the thermal content stored in the ions. In addition, for all of our sequences, we provide accurate color and magnitudes on the basis of new and improved non-gray model atmospheres that explicitly include Lyα quasi-molecular opacity Instituto de Astrofísica de La Plata |
description |
Aims. Motivated by the recent detection of single and binary He-core white dwarfs in metal-rich clusters, we present a full set of evolutionary calculations and colors appropriate to the study of these white dwarfs. The paper is also aimed at investigating whether stable hydrogen burning may constitute a major source of energy for massive He-core white dwarfs resulting from high-metallicity progenitors. Methods. White dwarf sequences are derived by considering the evolutionary history of progenitor stars with supersolar metallicities. We also incorporate a self-consistent, time-dependent treatment of gravitational settling and chemical diffusion, as well as of the residual nuclear burning. Results. We find that the influence of residual nuclear burning during the late stages of white dwarf evolution is strongly dependent on the chemical diffusion at the base of the hydrogen-rich envelope. When no diffusion is considered, residual hydrogen burning strongly influences the advanced stages of white dwarf cooling, introducing evolutionary delays of several Gyr. By contrast, when diffusion is taken into account, the role of residual nuclear burning is strongly mitigated, and the evolution is only dictated by the thermal content stored in the ions. In addition, for all of our sequences, we provide accurate color and magnitudes on the basis of new and improved non-gray model atmospheres that explicitly include Lyα quasi-molecular opacity |
publishDate |
2009 |
dc.date.none.fl_str_mv |
2009-12 |
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 |
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publishedVersion |
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http://sedici.unlp.edu.ar/handle/10915/93542 |
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http://sedici.unlp.edu.ar/handle/10915/93542 |
dc.language.none.fl_str_mv |
eng |
language |
eng |
dc.relation.none.fl_str_mv |
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openAccess |
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http://creativecommons.org/licenses/by-nc-sa/4.0/ Creative Commons Attribution-NonCommercial-ShareAlike 4.0 International (CC BY-NC-SA 4.0) |
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