Forever young white dwarfs : when stellar ageing stops

Autores
Camisassa, María Eugenia; Althaus, Leandro Gabriel; Torres, Santiago; Corsico, Alejandro Hugo; Rebassa Mansergas, Alberto; Tremblay, Pier Emmanuel; Cheng, Sihao; Raddi, Roberto
Año de publicación
2021
Idioma
inglés
Tipo de recurso
artículo
Estado
versión publicada
Descripción
White dwarf stars are the most common end point of stellar evolution. The ultramassive white dwarfs are of special interest as they are related to type Ia supernovae explosions, merger events, and fast radio bursts. Ultramassive white dwarfs are expected to harbour oxygen-neon (ONe) cores as a result of single standard stellar evolution. However, a fraction of them could have carbon-oxygen (CO) cores. Recent studies, based on the new observations provided by the Gaia space mission, indicate that a small fraction of the ultramassive white dwarfs experience a strong delay in their cooling, which cannot be solely attributed to the occurrence of crystallisation, thus requiring an unknown energy source able to prolong their life for long periods of time. In this study, we find that the energy released by 22Ne sedimentation in the deep interior of ultramassive white dwarfs with CO cores and high 22Ne content is consistent with the long cooling delay of these stellar remnants. On the basis of a synthesis study of the white dwarf population, based on Monte Carlo techniques, we find that the observations revealed by Gaia can be explained by the existence of these prolonged youth ultramassive white dwarfs. Although such a high 22Ne abundance is not consistent with the standard evolutionary channels, our results provide evidence for the existence of CO-core ultramassive white dwarfs and for the occurrence of 22Ne sedimentation.
Fil: Camisassa, María Eugenia. State University of Colorado at Boulder; Estados Unidos. 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: Torres, Santiago. Universidad Politécnica de Catalunya; España
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: Rebassa Mansergas, Alberto. Universidad Politécnica de Catalunya; España. Instituto de Estudios Espaciales de Cataluña; España
Fil: Tremblay, Pier Emmanuel. University of Warwick; Reino Unido
Fil: Cheng, Sihao. University Johns Hopkins; Estados Unidos
Fil: Raddi, Roberto. Universidad Politécnica de Catalunya; España
Materia
STARS: EVOLUTION
STARS: INTERIORS
WHITE DWARFS
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:11336/153274
Acceder
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network_acronym_str CONICETDig
repository_id_str 3498
network_name_str CONICET Digital (CONICET)
spelling Forever young white dwarfs : when stellar ageing stopsCamisassa, María EugeniaAlthaus, Leandro GabrielTorres, SantiagoCorsico, Alejandro HugoRebassa Mansergas, AlbertoTremblay, Pier EmmanuelCheng, SihaoRaddi, RobertoSTARS: EVOLUTIONSTARS: INTERIORSWHITE DWARFShttps://purl.org/becyt/ford/1.3https://purl.org/becyt/ford/1White dwarf stars are the most common end point of stellar evolution. The ultramassive white dwarfs are of special interest as they are related to type Ia supernovae explosions, merger events, and fast radio bursts. Ultramassive white dwarfs are expected to harbour oxygen-neon (ONe) cores as a result of single standard stellar evolution. However, a fraction of them could have carbon-oxygen (CO) cores. Recent studies, based on the new observations provided by the Gaia space mission, indicate that a small fraction of the ultramassive white dwarfs experience a strong delay in their cooling, which cannot be solely attributed to the occurrence of crystallisation, thus requiring an unknown energy source able to prolong their life for long periods of time. In this study, we find that the energy released by 22Ne sedimentation in the deep interior of ultramassive white dwarfs with CO cores and high 22Ne content is consistent with the long cooling delay of these stellar remnants. On the basis of a synthesis study of the white dwarf population, based on Monte Carlo techniques, we find that the observations revealed by Gaia can be explained by the existence of these prolonged youth ultramassive white dwarfs. Although such a high 22Ne abundance is not consistent with the standard evolutionary channels, our results provide evidence for the existence of CO-core ultramassive white dwarfs and for the occurrence of 22Ne sedimentation.Fil: Camisassa, María Eugenia. State University of Colorado at Boulder; Estados Unidos. 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: Torres, Santiago. Universidad Politécnica de Catalunya; EspañaFil: 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: Rebassa Mansergas, Alberto. Universidad Politécnica de Catalunya; España. Instituto de Estudios Espaciales de Cataluña; EspañaFil: Tremblay, Pier Emmanuel. University of Warwick; Reino UnidoFil: Cheng, Sihao. University Johns Hopkins; Estados UnidosFil: Raddi, Roberto. Universidad Politécnica de Catalunya; EspañaEDP Sciences2021-05info:eu-repo/semantics/articleinfo:eu-repo/semantics/publishedVersionhttp://purl.org/coar/resource_type/c_6501info:ar-repo/semantics/articuloapplication/pdfapplication/pdfhttp://hdl.handle.net/11336/153274Camisassa, María Eugenia; Althaus, Leandro Gabriel; Torres, Santiago; Corsico, Alejandro Hugo; Rebassa Mansergas, Alberto; et al.; Forever young white dwarfs : when stellar ageing stops; EDP Sciences; Astronomy and Astrophysics; 649; L7; 5-2021; 1-50004-6361CONICET DigitalCONICETenginfo:eu-repo/semantics/altIdentifier/doi/10.1051/0004-6361/202140720info:eu-repo/semantics/altIdentifier/url/https://www.aanda.org/articles/aa/full_html/2021/05/aa40720-21/aa40720-21.htmlinfo:eu-repo/semantics/openAccesshttps://creativecommons.org/licenses/by-nc-sa/2.5/ar/reponame:CONICET Digital (CONICET)instname:Consejo Nacional de Investigaciones Científicas y Técnicas2025-09-29T09:33:00Zoai:ri.conicet.gov.ar:11336/153274instacron: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 09:33:00.83CONICET Digital (CONICET) - Consejo Nacional de Investigaciones Científicas y Técnicasfalse
dc.title.none.fl_str_mv Forever young white dwarfs : when stellar ageing stops
title Forever young white dwarfs : when stellar ageing stops
spellingShingle Forever young white dwarfs : when stellar ageing stops
Camisassa, María Eugenia
STARS: EVOLUTION
STARS: INTERIORS
WHITE DWARFS
title_short Forever young white dwarfs : when stellar ageing stops
title_full Forever young white dwarfs : when stellar ageing stops
title_fullStr Forever young white dwarfs : when stellar ageing stops
title_full_unstemmed Forever young white dwarfs : when stellar ageing stops
title_sort Forever young white dwarfs : when stellar ageing stops
dc.creator.none.fl_str_mv Camisassa, María Eugenia
Althaus, Leandro Gabriel
Torres, Santiago
Corsico, Alejandro Hugo
Rebassa Mansergas, Alberto
Tremblay, Pier Emmanuel
Cheng, Sihao
Raddi, Roberto
author Camisassa, María Eugenia
author_facet Camisassa, María Eugenia
Althaus, Leandro Gabriel
Torres, Santiago
Corsico, Alejandro Hugo
Rebassa Mansergas, Alberto
Tremblay, Pier Emmanuel
Cheng, Sihao
Raddi, Roberto
author_role author
author2 Althaus, Leandro Gabriel
Torres, Santiago
Corsico, Alejandro Hugo
Rebassa Mansergas, Alberto
Tremblay, Pier Emmanuel
Cheng, Sihao
Raddi, Roberto
author2_role author
author
author
author
author
author
author
dc.subject.none.fl_str_mv STARS: EVOLUTION
STARS: INTERIORS
WHITE DWARFS
topic STARS: EVOLUTION
STARS: INTERIORS
WHITE DWARFS
purl_subject.fl_str_mv https://purl.org/becyt/ford/1.3
https://purl.org/becyt/ford/1
dc.description.none.fl_txt_mv White dwarf stars are the most common end point of stellar evolution. The ultramassive white dwarfs are of special interest as they are related to type Ia supernovae explosions, merger events, and fast radio bursts. Ultramassive white dwarfs are expected to harbour oxygen-neon (ONe) cores as a result of single standard stellar evolution. However, a fraction of them could have carbon-oxygen (CO) cores. Recent studies, based on the new observations provided by the Gaia space mission, indicate that a small fraction of the ultramassive white dwarfs experience a strong delay in their cooling, which cannot be solely attributed to the occurrence of crystallisation, thus requiring an unknown energy source able to prolong their life for long periods of time. In this study, we find that the energy released by 22Ne sedimentation in the deep interior of ultramassive white dwarfs with CO cores and high 22Ne content is consistent with the long cooling delay of these stellar remnants. On the basis of a synthesis study of the white dwarf population, based on Monte Carlo techniques, we find that the observations revealed by Gaia can be explained by the existence of these prolonged youth ultramassive white dwarfs. Although such a high 22Ne abundance is not consistent with the standard evolutionary channels, our results provide evidence for the existence of CO-core ultramassive white dwarfs and for the occurrence of 22Ne sedimentation.
Fil: Camisassa, María Eugenia. State University of Colorado at Boulder; Estados Unidos. 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: Torres, Santiago. Universidad Politécnica de Catalunya; España
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: Rebassa Mansergas, Alberto. Universidad Politécnica de Catalunya; España. Instituto de Estudios Espaciales de Cataluña; España
Fil: Tremblay, Pier Emmanuel. University of Warwick; Reino Unido
Fil: Cheng, Sihao. University Johns Hopkins; Estados Unidos
Fil: Raddi, Roberto. Universidad Politécnica de Catalunya; España
description White dwarf stars are the most common end point of stellar evolution. The ultramassive white dwarfs are of special interest as they are related to type Ia supernovae explosions, merger events, and fast radio bursts. Ultramassive white dwarfs are expected to harbour oxygen-neon (ONe) cores as a result of single standard stellar evolution. However, a fraction of them could have carbon-oxygen (CO) cores. Recent studies, based on the new observations provided by the Gaia space mission, indicate that a small fraction of the ultramassive white dwarfs experience a strong delay in their cooling, which cannot be solely attributed to the occurrence of crystallisation, thus requiring an unknown energy source able to prolong their life for long periods of time. In this study, we find that the energy released by 22Ne sedimentation in the deep interior of ultramassive white dwarfs with CO cores and high 22Ne content is consistent with the long cooling delay of these stellar remnants. On the basis of a synthesis study of the white dwarf population, based on Monte Carlo techniques, we find that the observations revealed by Gaia can be explained by the existence of these prolonged youth ultramassive white dwarfs. Although such a high 22Ne abundance is not consistent with the standard evolutionary channels, our results provide evidence for the existence of CO-core ultramassive white dwarfs and for the occurrence of 22Ne sedimentation.
publishDate 2021
dc.date.none.fl_str_mv 2021-05
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/11336/153274
Camisassa, María Eugenia; Althaus, Leandro Gabriel; Torres, Santiago; Corsico, Alejandro Hugo; Rebassa Mansergas, Alberto; et al.; Forever young white dwarfs : when stellar ageing stops; EDP Sciences; Astronomy and Astrophysics; 649; L7; 5-2021; 1-5
0004-6361
CONICET Digital
CONICET
url http://hdl.handle.net/11336/153274
identifier_str_mv Camisassa, María Eugenia; Althaus, Leandro Gabriel; Torres, Santiago; Corsico, Alejandro Hugo; Rebassa Mansergas, Alberto; et al.; Forever young white dwarfs : when stellar ageing stops; EDP Sciences; Astronomy and Astrophysics; 649; L7; 5-2021; 1-5
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/doi/10.1051/0004-6361/202140720
info:eu-repo/semantics/altIdentifier/url/https://www.aanda.org/articles/aa/full_html/2021/05/aa40720-21/aa40720-21.html
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
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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