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
SEDICI (UNLP)
Institución
Universidad Nacional de La Plata
OAI Identificador
oai:sedici.unlp.edu.ar:10915/94048

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oai_identifier_str oai:sedici.unlp.edu.ar:10915/94048
network_acronym_str SEDICI
repository_id_str 1329
network_name_str SEDICI (UNLP)
spelling 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)
dc.format.none.fl_str_mv application/pdf
1605-1615
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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