New evolutionary sequences for the hot H-deficient white dwarfs on the basis of a full account of progenitor evolution
- Autores
- Althaus, Leandro Gabriel; Panei, Jorge Alejandro; Miller Bertolami, Marcelo Miguel; García Berro, Enrique; Córsico, Alejandro Hugo; Romero, Alejandra Daniela; Kepler, S. O.; Rohrmann, Rene Daniel
- Año de publicación
- 2009
- Idioma
- inglés
- Tipo de recurso
- artículo
- Estado
- versión publicada
- Descripción
- We present full evolutionary calculations appropriate for the study of hot hydrogen-deficient DO white dwarfs, PG 1159 stars, and DB white dwarfs. White dwarf sequences are computed for a wide range of stellar masses and helium envelopes on the basis of a complete treatment of the evolutionary history of progenitors stars, including the core hydrogen and helium burning phases, the thermally pulsing asymptotic giant branch phase, and the born-again episode that is responsible for the hydrogen deficiency. We also provide colors and magnitudes for the new sequences for Teff < 40,000 K, where the NLTE effects are not dominant. These new calculations provide a homogeneous set of evolutionary tracks appropriate for mass and age determinations for both PG 1159 stars and DO white dwarfs. The calculations are extended down to an effective temperature of 7000 K. We applied these new tracks to redetermine stellar masses and ages of all known DO white dwarfs with spectroscopically determined effective temperatures and gravities, and compare them with previous results. We also compare for the first time consistent mass determinations for both DO and PG 1159 stars, and find a considerably higher mean mass for the DO white dwarfs. We discuss as well the chemical profile expected in the envelope of variable DB white dwarfs from the consideration of the evolutionary history of progenitor stars. Finally, we present tentative evidence for a different evolutionary channel, other than that involving the PG 1159 stars, for the formation of hot, hydrogen-deficient white dwarfs
Facultad de Ciencias Astronómicas y Geofísicas
Instituto de Astrofísica de La Plata - Materia
-
Astronomía
Abundances
AGB stars
Evolution of stars
Interior stars
Variables stars
White dwarfs
Post-AGB stars - 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:10915/94048
Ver los metadatos del registro completo
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New evolutionary sequences for the hot H-deficient white dwarfs on the basis of a full account of progenitor evolutionAlthaus, Leandro GabrielPanei, Jorge AlejandroMiller Bertolami, Marcelo MiguelGarcía Berro, EnriqueCórsico, Alejandro HugoRomero, Alejandra DanielaKepler, S. O.Rohrmann, Rene DanielAstronomíaAbundancesAGB starsEvolution of starsInterior starsVariables starsWhite dwarfsPost-AGB starsWe present full evolutionary calculations appropriate for the study of hot hydrogen-deficient DO white dwarfs, PG 1159 stars, and DB white dwarfs. White dwarf sequences are computed for a wide range of stellar masses and helium envelopes on the basis of a complete treatment of the evolutionary history of progenitors stars, including the core hydrogen and helium burning phases, the thermally pulsing asymptotic giant branch phase, and the born-again episode that is responsible for the hydrogen deficiency. We also provide colors and magnitudes for the new sequences for Teff < 40,000 K, where the NLTE effects are not dominant. These new calculations provide a homogeneous set of evolutionary tracks appropriate for mass and age determinations for both PG 1159 stars and DO white dwarfs. The calculations are extended down to an effective temperature of 7000 K. We applied these new tracks to redetermine stellar masses and ages of all known DO white dwarfs with spectroscopically determined effective temperatures and gravities, and compare them with previous results. We also compare for the first time consistent mass determinations for both DO and PG 1159 stars, and find a considerably higher mean mass for the DO white dwarfs. We discuss as well the chemical profile expected in the envelope of variable DB white dwarfs from the consideration of the evolutionary history of progenitor stars. Finally, we present tentative evidence for a different evolutionary channel, other than that involving the PG 1159 stars, for the formation of hot, hydrogen-deficient white dwarfsFacultad de Ciencias Astronómicas y GeofísicasInstituto 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/pdf1605-1615http://sedici.unlp.edu.ar/handle/10915/94048enginfo:eu-repo/semantics/altIdentifier/url/http://iopscience.iop.org/article/10.1088/0004-637X/704/2/1605/metainfo:eu-repo/semantics/altIdentifier/issn/0004-637Xinfo:eu-repo/semantics/altIdentifier/doi/10.1088/0004-637X/704/2/1605info:eu-repo/semantics/altIdentifier/hdl/11336/46005info: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:10915/94048Institucionalhttp://sedici.unlp.edu.ar/Universidad públicaNo correspondehttp://sedici.unlp.edu.ar/oai/snrdalira@sedici.unlp.edu.arArgentinaNo correspondeNo correspondeNo correspondeopendoar:13292025-09-29 11:19:27.048SEDICI (UNLP) - Universidad Nacional de La Platafalse |
dc.title.none.fl_str_mv |
New evolutionary sequences for the hot H-deficient white dwarfs on the basis of a full account of progenitor evolution |
title |
New evolutionary sequences for the hot H-deficient white dwarfs on the basis of a full account of progenitor evolution |
spellingShingle |
New evolutionary sequences for the hot H-deficient white dwarfs on the basis of a full account of progenitor evolution Althaus, Leandro Gabriel Astronomía Abundances AGB stars Evolution of stars Interior stars Variables stars White dwarfs Post-AGB stars |
title_short |
New evolutionary sequences for the hot H-deficient white dwarfs on the basis of a full account of progenitor evolution |
title_full |
New evolutionary sequences for the hot H-deficient white dwarfs on the basis of a full account of progenitor evolution |
title_fullStr |
New evolutionary sequences for the hot H-deficient white dwarfs on the basis of a full account of progenitor evolution |
title_full_unstemmed |
New evolutionary sequences for the hot H-deficient white dwarfs on the basis of a full account of progenitor evolution |
title_sort |
New evolutionary sequences for the hot H-deficient white dwarfs on the basis of a full account of progenitor evolution |
dc.creator.none.fl_str_mv |
Althaus, Leandro Gabriel Panei, Jorge Alejandro Miller Bertolami, Marcelo Miguel García Berro, Enrique Córsico, Alejandro Hugo Romero, Alejandra Daniela Kepler, S. O. Rohrmann, Rene Daniel |
author |
Althaus, Leandro Gabriel |
author_facet |
Althaus, Leandro Gabriel Panei, Jorge Alejandro Miller Bertolami, Marcelo Miguel García Berro, Enrique Córsico, Alejandro Hugo Romero, Alejandra Daniela Kepler, S. O. Rohrmann, Rene Daniel |
author_role |
author |
author2 |
Panei, Jorge Alejandro Miller Bertolami, Marcelo Miguel García Berro, Enrique Córsico, Alejandro Hugo Romero, Alejandra Daniela Kepler, S. O. Rohrmann, Rene Daniel |
author2_role |
author author author author author author author |
dc.subject.none.fl_str_mv |
Astronomía Abundances AGB stars Evolution of stars Interior stars Variables stars White dwarfs Post-AGB stars |
topic |
Astronomía Abundances AGB stars Evolution of stars Interior stars Variables stars White dwarfs Post-AGB stars |
dc.description.none.fl_txt_mv |
We present full evolutionary calculations appropriate for the study of hot hydrogen-deficient DO white dwarfs, PG 1159 stars, and DB white dwarfs. White dwarf sequences are computed for a wide range of stellar masses and helium envelopes on the basis of a complete treatment of the evolutionary history of progenitors stars, including the core hydrogen and helium burning phases, the thermally pulsing asymptotic giant branch phase, and the born-again episode that is responsible for the hydrogen deficiency. We also provide colors and magnitudes for the new sequences for Teff < 40,000 K, where the NLTE effects are not dominant. These new calculations provide a homogeneous set of evolutionary tracks appropriate for mass and age determinations for both PG 1159 stars and DO white dwarfs. The calculations are extended down to an effective temperature of 7000 K. We applied these new tracks to redetermine stellar masses and ages of all known DO white dwarfs with spectroscopically determined effective temperatures and gravities, and compare them with previous results. We also compare for the first time consistent mass determinations for both DO and PG 1159 stars, and find a considerably higher mean mass for the DO white dwarfs. We discuss as well the chemical profile expected in the envelope of variable DB white dwarfs from the consideration of the evolutionary history of progenitor stars. Finally, we present tentative evidence for a different evolutionary channel, other than that involving the PG 1159 stars, for the formation of hot, hydrogen-deficient white dwarfs Facultad de Ciencias Astronómicas y Geofísicas Instituto de Astrofísica de La Plata |
description |
We present full evolutionary calculations appropriate for the study of hot hydrogen-deficient DO white dwarfs, PG 1159 stars, and DB white dwarfs. White dwarf sequences are computed for a wide range of stellar masses and helium envelopes on the basis of a complete treatment of the evolutionary history of progenitors stars, including the core hydrogen and helium burning phases, the thermally pulsing asymptotic giant branch phase, and the born-again episode that is responsible for the hydrogen deficiency. We also provide colors and magnitudes for the new sequences for Teff < 40,000 K, where the NLTE effects are not dominant. These new calculations provide a homogeneous set of evolutionary tracks appropriate for mass and age determinations for both PG 1159 stars and DO white dwarfs. The calculations are extended down to an effective temperature of 7000 K. We applied these new tracks to redetermine stellar masses and ages of all known DO white dwarfs with spectroscopically determined effective temperatures and gravities, and compare them with previous results. We also compare for the first time consistent mass determinations for both DO and PG 1159 stars, and find a considerably higher mean mass for the DO white dwarfs. We discuss as well the chemical profile expected in the envelope of variable DB white dwarfs from the consideration of the evolutionary history of progenitor stars. Finally, we present tentative evidence for a different evolutionary channel, other than that involving the PG 1159 stars, for the formation of hot, hydrogen-deficient white dwarfs |
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 |
status_str |
publishedVersion |
dc.identifier.none.fl_str_mv |
http://sedici.unlp.edu.ar/handle/10915/94048 |
url |
http://sedici.unlp.edu.ar/handle/10915/94048 |
dc.language.none.fl_str_mv |
eng |
language |
eng |
dc.relation.none.fl_str_mv |
info:eu-repo/semantics/altIdentifier/url/http://iopscience.iop.org/article/10.1088/0004-637X/704/2/1605/meta info:eu-repo/semantics/altIdentifier/issn/0004-637X info:eu-repo/semantics/altIdentifier/doi/10.1088/0004-637X/704/2/1605 info:eu-repo/semantics/altIdentifier/hdl/11336/46005 |
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) |
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application/pdf 1605-1615 |
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