White dwarf evolutionary sequences for low-metallicity progenitors: The impact of third dredge-up

Context. White dwarfs are nowadays routinely used as reliable cosmochronometers, allowing several stellar populations to be dated.; Aims. We present new white dwarf evolutionary sequences for low-metallicity progenitors. This is motivated by the recent finding that residual H burning in low-mass whi...

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Autores: Althaus, Leandro G., Camisassa, Maria E, Miller Bertolami, Marcelo M, Corsico, Alejandro H., García-Berro Montilla, Enrique|||0000-0002-1623-5838
Tipo de recurso: artículo
Fecha de publicación:2015
País:España
Institución:Universitat Politècnica de Catalunya (UPC)
Repositorio:UPCommons. Portal del coneixement obert de la UPC
Idioma:inglés
OAI Identifier:oai:upcommons.upc.edu:2117/27813
Acceso en línea:https://hdl.handle.net/2117/27813
https://dx.doi.org/10.1051/0004-6361/201424922
Access Level:acceso abierto
Palabra clave:White dwarf stars
Starts -- Evolution
stars: evolution
stars: interiors
white dwarfs
ZZ-CETI STARS
PULSATIONAL PROPERTIES
COOLING SEQUENCES
GLOBULAR-CLUSTER
MASS
MODELS
AGE
OPACITIES
HYDROGEN
ASTEROSEISMOLOGY
Estels nans
Àrees temàtiques de la UPC::Física::Astronomia i astrofísica
id ES_6c9cd2ffca2b35ab403c484f03e86836
oai_identifier_str oai:upcommons.upc.edu:2117/27813
network_acronym_str ES
network_name_str España
repository_id_str
spelling White dwarf evolutionary sequences for low-metallicity progenitors: The impact of third dredge-upAlthaus, Leandro G.Camisassa, Maria EMiller Bertolami, Marcelo MCorsico, Alejandro H.García-Berro Montilla, Enrique|||0000-0002-1623-5838White dwarf starsStarts -- Evolutionstars: evolutionstars: interiorswhite dwarfsZZ-CETI STARSPULSATIONAL PROPERTIESCOOLING SEQUENCESGLOBULAR-CLUSTERMASSMODELSAGEOPACITIESHYDROGENASTEROSEISMOLOGYEstels nansÀrees temàtiques de la UPC::Física::Astronomia i astrofísicaContext. White dwarfs are nowadays routinely used as reliable cosmochronometers, allowing several stellar populations to be dated.; Aims. We present new white dwarf evolutionary sequences for low-metallicity progenitors. This is motivated by the recent finding that residual H burning in low-mass white dwarfs resulting from Z = 0.0001 progenitors is the main energy source over a significant part of their evolution.; Methods. White dwarf sequences have been derived from full evolutionary calculations that take the entire history of progenitor stars into account, including the thermally pulsing and the post-asymptotic giant branch (AGB) phases.; Results. We show that for progenitor metallicities in the range 0.00003 less than or similar to Z less than or similar to 0.001, and in the absence of carbon enrichment from the occurrence of a third dredge-up episode, the resulting H envelope of the low-mass white dwarfs is thick enough to make stable H burning the most important energy source even at low luminosities. This has a significant impact on white dwarf cooling times. This result is independent of the adopted mass-loss rate during the thermally-pulsing and post-AGB phases and in the planetary nebulae stage.; Conclusions. We conclude that in the absence of third dredge-up episodes, a significant part of the evolution of low-mass white dwarfs resulting from low-metallicity progenitors is dominated by stable H burning. Our study opens the possibility of using the observed white dwarf luminosity function of low-metallicity globular clusters to constrain the efficiency of third dredge up episodes during the thermally-pulsing AGB phase of low-metallicity progenitors.Peer Reviewed20152015-04-0120152015-05-07journal articlehttp://purl.org/coar/resource_type/c_6501AMhttp://purl.org/coar/version/c_ab4af688f83e57aainfo:eu-repo/semantics/articleapplication/pdfhttps://hdl.handle.net/2117/27813https://dx.doi.org/10.1051/0004-6361/201424922reponame:UPCommons. Portal del coneixement obert de la UPCinstname:Universitat Politècnica de Catalunya (UPC)Inglésengopen accesshttp://purl.org/coar/access_right/c_abf2Attribution-NonCommercial-NoDerivs 3.0 Spainhttp://creativecommons.org/licenses/by-nc-nd/3.0/es/info:eu-repo/semantics/openAccessoai:upcommons.upc.edu:2117/278132026-05-27T15:37:01Z
dc.title.none.fl_str_mv White dwarf evolutionary sequences for low-metallicity progenitors: The impact of third dredge-up
title White dwarf evolutionary sequences for low-metallicity progenitors: The impact of third dredge-up
spellingShingle White dwarf evolutionary sequences for low-metallicity progenitors: The impact of third dredge-up
Althaus, Leandro G.
White dwarf stars
Starts -- Evolution
stars: evolution
stars: interiors
white dwarfs
ZZ-CETI STARS
PULSATIONAL PROPERTIES
COOLING SEQUENCES
GLOBULAR-CLUSTER
MASS
MODELS
AGE
OPACITIES
HYDROGEN
ASTEROSEISMOLOGY
Estels nans
Àrees temàtiques de la UPC::Física::Astronomia i astrofísica
title_short White dwarf evolutionary sequences for low-metallicity progenitors: The impact of third dredge-up
title_full White dwarf evolutionary sequences for low-metallicity progenitors: The impact of third dredge-up
title_fullStr White dwarf evolutionary sequences for low-metallicity progenitors: The impact of third dredge-up
title_full_unstemmed White dwarf evolutionary sequences for low-metallicity progenitors: The impact of third dredge-up
title_sort White dwarf evolutionary sequences for low-metallicity progenitors: The impact of third dredge-up
dc.creator.none.fl_str_mv Althaus, Leandro G.
Camisassa, Maria E
Miller Bertolami, Marcelo M
Corsico, Alejandro H.
García-Berro Montilla, Enrique|||0000-0002-1623-5838
author Althaus, Leandro G.
author_facet Althaus, Leandro G.
Camisassa, Maria E
Miller Bertolami, Marcelo M
Corsico, Alejandro H.
García-Berro Montilla, Enrique|||0000-0002-1623-5838
author_role author
author2 Camisassa, Maria E
Miller Bertolami, Marcelo M
Corsico, Alejandro H.
García-Berro Montilla, Enrique|||0000-0002-1623-5838
author2_role author
author
author
author
dc.subject.none.fl_str_mv White dwarf stars
Starts -- Evolution
stars: evolution
stars: interiors
white dwarfs
ZZ-CETI STARS
PULSATIONAL PROPERTIES
COOLING SEQUENCES
GLOBULAR-CLUSTER
MASS
MODELS
AGE
OPACITIES
HYDROGEN
ASTEROSEISMOLOGY
Estels nans
Àrees temàtiques de la UPC::Física::Astronomia i astrofísica
topic White dwarf stars
Starts -- Evolution
stars: evolution
stars: interiors
white dwarfs
ZZ-CETI STARS
PULSATIONAL PROPERTIES
COOLING SEQUENCES
GLOBULAR-CLUSTER
MASS
MODELS
AGE
OPACITIES
HYDROGEN
ASTEROSEISMOLOGY
Estels nans
Àrees temàtiques de la UPC::Física::Astronomia i astrofísica
description Context. White dwarfs are nowadays routinely used as reliable cosmochronometers, allowing several stellar populations to be dated.; Aims. We present new white dwarf evolutionary sequences for low-metallicity progenitors. This is motivated by the recent finding that residual H burning in low-mass white dwarfs resulting from Z = 0.0001 progenitors is the main energy source over a significant part of their evolution.; Methods. White dwarf sequences have been derived from full evolutionary calculations that take the entire history of progenitor stars into account, including the thermally pulsing and the post-asymptotic giant branch (AGB) phases.; Results. We show that for progenitor metallicities in the range 0.00003 less than or similar to Z less than or similar to 0.001, and in the absence of carbon enrichment from the occurrence of a third dredge-up episode, the resulting H envelope of the low-mass white dwarfs is thick enough to make stable H burning the most important energy source even at low luminosities. This has a significant impact on white dwarf cooling times. This result is independent of the adopted mass-loss rate during the thermally-pulsing and post-AGB phases and in the planetary nebulae stage.; Conclusions. We conclude that in the absence of third dredge-up episodes, a significant part of the evolution of low-mass white dwarfs resulting from low-metallicity progenitors is dominated by stable H burning. Our study opens the possibility of using the observed white dwarf luminosity function of low-metallicity globular clusters to constrain the efficiency of third dredge up episodes during the thermally-pulsing AGB phase of low-metallicity progenitors.
publishDate 2015
dc.date.none.fl_str_mv 2015
2015-04-01
2015
2015-05-07
dc.type.none.fl_str_mv journal article
http://purl.org/coar/resource_type/c_6501
AM
http://purl.org/coar/version/c_ab4af688f83e57aa
dc.type.openaire.fl_str_mv info:eu-repo/semantics/article
format article
dc.identifier.none.fl_str_mv https://hdl.handle.net/2117/27813
https://dx.doi.org/10.1051/0004-6361/201424922
url https://hdl.handle.net/2117/27813
https://dx.doi.org/10.1051/0004-6361/201424922
dc.language.none.fl_str_mv Inglés
eng
language_invalid_str_mv Inglés
language eng
dc.rights.none.fl_str_mv open access
http://purl.org/coar/access_right/c_abf2
Attribution-NonCommercial-NoDerivs 3.0 Spain
http://creativecommons.org/licenses/by-nc-nd/3.0/es/
dc.rights.openaire.fl_str_mv info:eu-repo/semantics/openAccess
rights_invalid_str_mv open access
http://purl.org/coar/access_right/c_abf2
Attribution-NonCommercial-NoDerivs 3.0 Spain
http://creativecommons.org/licenses/by-nc-nd/3.0/es/
eu_rights_str_mv openAccess
dc.format.none.fl_str_mv application/pdf
dc.source.none.fl_str_mv reponame:UPCommons. Portal del coneixement obert de la UPC
instname:Universitat Politècnica de Catalunya (UPC)
instname_str Universitat Politècnica de Catalunya (UPC)
reponame_str UPCommons. Portal del coneixement obert de la UPC
collection UPCommons. Portal del coneixement obert de la UPC
repository.name.fl_str_mv
repository.mail.fl_str_mv
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score 15.300719

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