Asteroseismology of the Kepler V777 Herculis variable white dwarf with fully evolutionary models

Autores
Corsico, Alejandro Hugo; Althaus, Leandro Gabriel; Miller Bertolami, Marcelo Miguel; Bischoff Kim, A.
Año de publicación
2012
Idioma
inglés
Tipo de recurso
artículo
Estado
versión publicada
Descripción
Context. DBV stars are pulsating white dwarfs with atmospheres rich in He. Asteroseismology of DBV stars can provide valuableclues about the origin, structure and evolution of hydrogen-deficient white dwarfs, and may allow to study neutrino and axion physics.Recently, a new DBV star, KIC 8626021, has been discovered in the field of the Kepler spacecraft. It is expected that furthermonitoringof this star in the next years will enable astronomers to determine its detailed asteroseismic profile.Aims. We perform an asteroseismological analysis of KIC 8626021 on the basis of fully evolutionary DB white-dwarf models.Methods. We employ a complete set of evolutionary DB white-dwarf structures covering a wide range of effective temperaturesand stellar masses. They have been obtained on the basis of a complete treatment of the evolutionary history of progenitors stars.We compute g-mode adiabatic pulsation periods for this set of models and compare them with the pulsation properties exhibited byKIC 8626021.Results. On the basis of the mean period spacing of the star, we found that the stellar mass should be substantially larger thanspectroscopy indicates. From period-to-period fits we found an asteroseismological model characterized by an effective temperaturemuch higher than the spectroscopic estimate.Conclusions. In agreement with a recent asteroseismological analysis of this star by other authors, we conclude that KIC 8626021is located near the blue edge of the DBV instability strip, contrarily to spectroscopic predictions. We also conclude that the mass ofKIC 8626021 should be substantially larger than thought.
Fil: Corsico, Alejandro Hugo. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - La Plata. Instituto de Astrofísica La Plata. Universidad Nacional de La Plata. Facultad de Ciencias Astronómicas y Geofísicas. Instituto de Astrofísica La Plata; Argentina
Fil: Althaus, Leandro Gabriel. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - La Plata. Instituto de Astrofísica La Plata. Universidad Nacional de La Plata. Facultad de Ciencias Astronómicas y Geofísicas. Instituto de Astrofísica La Plata; Argentina
Fil: Miller Bertolami, Marcelo Miguel. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - La Plata. Instituto de Astrofísica La Plata. Universidad Nacional de La Plata. Facultad de Ciencias Astronómicas y Geofísicas. Instituto de Astrofísica La Plata; Argentina
Fil: Bischoff Kim, A.. University of Georgia; Estados Unidos
Materia
stars: interiors
stars: oscillations
asteroseismology
white dwarfs
stars: evolution
Nivel de accesibilidad
acceso abierto
Condiciones de uso
https://creativecommons.org/licenses/by-nc-sa/2.5/ar/
Repositorio
CONICET Digital (CONICET)
Institución
Consejo Nacional de Investigaciones Científicas y Técnicas
OAI Identificador
oai:ri.conicet.gov.ar:11336/270606
Acceder
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oai_identifier_str oai:ri.conicet.gov.ar:11336/270606
network_acronym_str CONICETDig
repository_id_str 3498
network_name_str CONICET Digital (CONICET)
spelling Asteroseismology of the Kepler V777 Herculis variable white dwarf with fully evolutionary modelsCorsico, Alejandro HugoAlthaus, Leandro GabrielMiller Bertolami, Marcelo MiguelBischoff Kim, A.stars: interiorsstars: oscillationsasteroseismologywhite dwarfsstars: evolutionhttps://purl.org/becyt/ford/1.3https://purl.org/becyt/ford/1Context. DBV stars are pulsating white dwarfs with atmospheres rich in He. Asteroseismology of DBV stars can provide valuableclues about the origin, structure and evolution of hydrogen-deficient white dwarfs, and may allow to study neutrino and axion physics.Recently, a new DBV star, KIC 8626021, has been discovered in the field of the Kepler spacecraft. It is expected that furthermonitoringof this star in the next years will enable astronomers to determine its detailed asteroseismic profile.Aims. We perform an asteroseismological analysis of KIC 8626021 on the basis of fully evolutionary DB white-dwarf models.Methods. We employ a complete set of evolutionary DB white-dwarf structures covering a wide range of effective temperaturesand stellar masses. They have been obtained on the basis of a complete treatment of the evolutionary history of progenitors stars.We compute g-mode adiabatic pulsation periods for this set of models and compare them with the pulsation properties exhibited byKIC 8626021.Results. On the basis of the mean period spacing of the star, we found that the stellar mass should be substantially larger thanspectroscopy indicates. From period-to-period fits we found an asteroseismological model characterized by an effective temperaturemuch higher than the spectroscopic estimate.Conclusions. In agreement with a recent asteroseismological analysis of this star by other authors, we conclude that KIC 8626021is located near the blue edge of the DBV instability strip, contrarily to spectroscopic predictions. We also conclude that the mass ofKIC 8626021 should be substantially larger than thought.Fil: Corsico, Alejandro Hugo. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - La Plata. Instituto de Astrofísica La Plata. Universidad Nacional de La Plata. Facultad de Ciencias Astronómicas y Geofísicas. Instituto de Astrofísica La Plata; ArgentinaFil: Althaus, Leandro Gabriel. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - La Plata. Instituto de Astrofísica La Plata. Universidad Nacional de La Plata. Facultad de Ciencias Astronómicas y Geofísicas. Instituto de Astrofísica La Plata; ArgentinaFil: Miller Bertolami, Marcelo Miguel. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - La Plata. Instituto de Astrofísica La Plata. Universidad Nacional de La Plata. Facultad de Ciencias Astronómicas y Geofísicas. Instituto de Astrofísica La Plata; ArgentinaFil: Bischoff Kim, A.. University of Georgia; Estados UnidosEDP Sciences2012-04info:eu-repo/semantics/articleinfo:eu-repo/semantics/publishedVersionhttp://purl.org/coar/resource_type/c_6501info:ar-repo/semantics/articuloapplication/pdfapplication/pdfapplication/pdfapplication/pdfhttp://hdl.handle.net/11336/270606Corsico, Alejandro Hugo; Althaus, Leandro Gabriel; Miller Bertolami, Marcelo Miguel; Bischoff Kim, A.; Asteroseismology of the Kepler V777 Herculis variable white dwarf with fully evolutionary models; EDP Sciences; Astronomy and Astrophysics; 541; 4-2012; 1-80004-6361CONICET DigitalCONICETenginfo:eu-repo/semantics/altIdentifier/url/https://www.aanda.org/articles/aa/full_html/2012/05/aa18736-11/aa18736-11.htmlinfo:eu-repo/semantics/altIdentifier/doi/10.1051/0004-6361/201118736info:eu-repo/semantics/openAccesshttps://creativecommons.org/licenses/by-nc-sa/2.5/ar/reponame:CONICET Digital (CONICET)instname:Consejo Nacional de Investigaciones Científicas y Técnicas2025-09-29T09:37:06Zoai:ri.conicet.gov.ar:11336/270606instacron:CONICETInstitucionalhttp://ri.conicet.gov.ar/Organismo científico-tecnológicoNo correspondehttp://ri.conicet.gov.ar/oai/requestdasensio@conicet.gov.ar; lcarlino@conicet.gov.arArgentinaNo correspondeNo correspondeNo correspondeopendoar:34982025-09-29 09:37:07.121CONICET Digital (CONICET) - Consejo Nacional de Investigaciones Científicas y Técnicasfalse
dc.title.none.fl_str_mv Asteroseismology of the Kepler V777 Herculis variable white dwarf with fully evolutionary models
title Asteroseismology of the Kepler V777 Herculis variable white dwarf with fully evolutionary models
spellingShingle Asteroseismology of the Kepler V777 Herculis variable white dwarf with fully evolutionary models
Corsico, Alejandro Hugo
stars: interiors
stars: oscillations
asteroseismology
white dwarfs
stars: evolution
title_short Asteroseismology of the Kepler V777 Herculis variable white dwarf with fully evolutionary models
title_full Asteroseismology of the Kepler V777 Herculis variable white dwarf with fully evolutionary models
title_fullStr Asteroseismology of the Kepler V777 Herculis variable white dwarf with fully evolutionary models
title_full_unstemmed Asteroseismology of the Kepler V777 Herculis variable white dwarf with fully evolutionary models
title_sort Asteroseismology of the Kepler V777 Herculis variable white dwarf with fully evolutionary models
dc.creator.none.fl_str_mv Corsico, Alejandro Hugo
Althaus, Leandro Gabriel
Miller Bertolami, Marcelo Miguel
Bischoff Kim, A.
author Corsico, Alejandro Hugo
author_facet Corsico, Alejandro Hugo
Althaus, Leandro Gabriel
Miller Bertolami, Marcelo Miguel
Bischoff Kim, A.
author_role author
author2 Althaus, Leandro Gabriel
Miller Bertolami, Marcelo Miguel
Bischoff Kim, A.
author2_role author
author
author
dc.subject.none.fl_str_mv stars: interiors
stars: oscillations
asteroseismology
white dwarfs
stars: evolution
topic stars: interiors
stars: oscillations
asteroseismology
white dwarfs
stars: evolution
purl_subject.fl_str_mv https://purl.org/becyt/ford/1.3
https://purl.org/becyt/ford/1
dc.description.none.fl_txt_mv Context. DBV stars are pulsating white dwarfs with atmospheres rich in He. Asteroseismology of DBV stars can provide valuableclues about the origin, structure and evolution of hydrogen-deficient white dwarfs, and may allow to study neutrino and axion physics.Recently, a new DBV star, KIC 8626021, has been discovered in the field of the Kepler spacecraft. It is expected that furthermonitoringof this star in the next years will enable astronomers to determine its detailed asteroseismic profile.Aims. We perform an asteroseismological analysis of KIC 8626021 on the basis of fully evolutionary DB white-dwarf models.Methods. We employ a complete set of evolutionary DB white-dwarf structures covering a wide range of effective temperaturesand stellar masses. They have been obtained on the basis of a complete treatment of the evolutionary history of progenitors stars.We compute g-mode adiabatic pulsation periods for this set of models and compare them with the pulsation properties exhibited byKIC 8626021.Results. On the basis of the mean period spacing of the star, we found that the stellar mass should be substantially larger thanspectroscopy indicates. From period-to-period fits we found an asteroseismological model characterized by an effective temperaturemuch higher than the spectroscopic estimate.Conclusions. In agreement with a recent asteroseismological analysis of this star by other authors, we conclude that KIC 8626021is located near the blue edge of the DBV instability strip, contrarily to spectroscopic predictions. We also conclude that the mass ofKIC 8626021 should be substantially larger than thought.
Fil: Corsico, Alejandro Hugo. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - La Plata. Instituto de Astrofísica La Plata. Universidad Nacional de La Plata. Facultad de Ciencias Astronómicas y Geofísicas. Instituto de Astrofísica La Plata; Argentina
Fil: Althaus, Leandro Gabriel. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - La Plata. Instituto de Astrofísica La Plata. Universidad Nacional de La Plata. Facultad de Ciencias Astronómicas y Geofísicas. Instituto de Astrofísica La Plata; Argentina
Fil: Miller Bertolami, Marcelo Miguel. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - La Plata. Instituto de Astrofísica La Plata. Universidad Nacional de La Plata. Facultad de Ciencias Astronómicas y Geofísicas. Instituto de Astrofísica La Plata; Argentina
Fil: Bischoff Kim, A.. University of Georgia; Estados Unidos
description Context. DBV stars are pulsating white dwarfs with atmospheres rich in He. Asteroseismology of DBV stars can provide valuableclues about the origin, structure and evolution of hydrogen-deficient white dwarfs, and may allow to study neutrino and axion physics.Recently, a new DBV star, KIC 8626021, has been discovered in the field of the Kepler spacecraft. It is expected that furthermonitoringof this star in the next years will enable astronomers to determine its detailed asteroseismic profile.Aims. We perform an asteroseismological analysis of KIC 8626021 on the basis of fully evolutionary DB white-dwarf models.Methods. We employ a complete set of evolutionary DB white-dwarf structures covering a wide range of effective temperaturesand stellar masses. They have been obtained on the basis of a complete treatment of the evolutionary history of progenitors stars.We compute g-mode adiabatic pulsation periods for this set of models and compare them with the pulsation properties exhibited byKIC 8626021.Results. On the basis of the mean period spacing of the star, we found that the stellar mass should be substantially larger thanspectroscopy indicates. From period-to-period fits we found an asteroseismological model characterized by an effective temperaturemuch higher than the spectroscopic estimate.Conclusions. In agreement with a recent asteroseismological analysis of this star by other authors, we conclude that KIC 8626021is located near the blue edge of the DBV instability strip, contrarily to spectroscopic predictions. We also conclude that the mass ofKIC 8626021 should be substantially larger than thought.
publishDate 2012
dc.date.none.fl_str_mv 2012-04
dc.type.none.fl_str_mv info:eu-repo/semantics/article
info:eu-repo/semantics/publishedVersion
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://hdl.handle.net/11336/270606
Corsico, Alejandro Hugo; Althaus, Leandro Gabriel; Miller Bertolami, Marcelo Miguel; Bischoff Kim, A.; Asteroseismology of the Kepler V777 Herculis variable white dwarf with fully evolutionary models; EDP Sciences; Astronomy and Astrophysics; 541; 4-2012; 1-8
0004-6361
CONICET Digital
CONICET
url http://hdl.handle.net/11336/270606
identifier_str_mv Corsico, Alejandro Hugo; Althaus, Leandro Gabriel; Miller Bertolami, Marcelo Miguel; Bischoff Kim, A.; Asteroseismology of the Kepler V777 Herculis variable white dwarf with fully evolutionary models; EDP Sciences; Astronomy and Astrophysics; 541; 4-2012; 1-8
0004-6361
CONICET Digital
CONICET
dc.language.none.fl_str_mv eng
language eng
dc.relation.none.fl_str_mv info:eu-repo/semantics/altIdentifier/url/https://www.aanda.org/articles/aa/full_html/2012/05/aa18736-11/aa18736-11.html
info:eu-repo/semantics/altIdentifier/doi/10.1051/0004-6361/201118736
dc.rights.none.fl_str_mv info:eu-repo/semantics/openAccess
https://creativecommons.org/licenses/by-nc-sa/2.5/ar/
eu_rights_str_mv openAccess
rights_invalid_str_mv https://creativecommons.org/licenses/by-nc-sa/2.5/ar/
dc.format.none.fl_str_mv application/pdf
application/pdf
application/pdf
application/pdf
dc.publisher.none.fl_str_mv EDP Sciences
publisher.none.fl_str_mv EDP Sciences
dc.source.none.fl_str_mv reponame:CONICET Digital (CONICET)
instname:Consejo Nacional de Investigaciones Científicas y Técnicas
reponame_str CONICET Digital (CONICET)
collection CONICET Digital (CONICET)
instname_str Consejo Nacional de Investigaciones Científicas y Técnicas
repository.name.fl_str_mv CONICET Digital (CONICET) - Consejo Nacional de Investigaciones Científicas y Técnicas
repository.mail.fl_str_mv dasensio@conicet.gov.ar; lcarlino@conicet.gov.ar
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score 13.070432

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