A white dwarf cooling age of 8 Gyr for NGC 6791 from physical separation processes

Autores
García Berro, Enrique; Torres, Santiago; Althaus, Leandro Gabriel; Renedo, Isabel; Lorén-Aguilar, Pablo; Corsico, Alejandro Hugo; Rohrmann, Rene Daniel; Salaris, Maurizio; Isern, Jordi
Año de publicación
2010
Idioma
inglés
Tipo de recurso
artículo
Estado
versión publicada
Descripción
NGC 6791 is a well studied open cluster1 that it is so close to us that can be imaged down to very faint luminosities2. The main-sequence turn-off age (∼8 Gyr) and the age derived from the termination of the white dwarf cooling sequence (∼6 Gyr) are very different. One possible explanation is that as white dwarfs cool, one of the ashes of helium burning, 22Ne, sinks in the deep interior of these stars 3-5. At lower temperatures, white dwarfs are expected to crystallize and phase separation of the main constituents of the core of a typical white dwarf (12C and 16O) is expected to occur6,7. This sequence of events is expected to introduce long delays in the cooling times8,9, but has not hitherto been proven. Here we report that, as theoretically anticipated5,6, physical separation processes occur in the cores of white dwarfs, resolving the age discrepancy for NGC 6791. © 2010 Macmillan Publishers Limited. All rights reserved.
Fil: García Berro, Enrique. Instituto de Estudios Espaciales de Cataluña; . Universidad Politécnica de Catalunya; España
Fil: Torres, Santiago. Instituto de Estudios Espaciales de Cataluña; . Universidad Politécnica de Catalunya; España
Fil: Althaus, Leandro Gabriel. Universidad Nacional de La Plata. Facultad de Ciencias Astronómicas y Geofísicas; Argentina. 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: Renedo, Isabel. Instituto de Estudios Espaciales de Cataluña; . Universidad Politécnica de Catalunya; España
Fil: Lorén-Aguilar, Pablo. Instituto de Estudios Espaciales de Cataluña; . 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: Rohrmann, Rene Daniel. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - San Juan. Instituto de Ciencias Astronómicas, de la Tierra y del Espacio. Universidad Nacional de San Juan. Instituto de Ciencias Astronómicas, de la Tierra y del Espacio; Argentina
Fil: Salaris, Maurizio. Liverpool John Moores University;
Fil: Isern, Jordi. Instituto de Estudios Espaciales de Cataluña; . Universitat Autònoma de Barcelona; España
Materia
White Dwarfs
Cosmochronology
Evolution of Stars
Interior Stars
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:11336/72283
Acceder
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oai_identifier_str oai:ri.conicet.gov.ar:11336/72283
network_acronym_str CONICETDig
repository_id_str 3498
network_name_str CONICET Digital (CONICET)
spelling A white dwarf cooling age of 8 Gyr for NGC 6791 from physical separation processesGarcía Berro, EnriqueTorres, SantiagoAlthaus, Leandro GabrielRenedo, IsabelLorén-Aguilar, PabloCorsico, Alejandro HugoRohrmann, Rene DanielSalaris, MaurizioIsern, JordiWhite DwarfsCosmochronologyEvolution of StarsInterior Starshttps://purl.org/becyt/ford/1.3https://purl.org/becyt/ford/1NGC 6791 is a well studied open cluster1 that it is so close to us that can be imaged down to very faint luminosities2. The main-sequence turn-off age (∼8 Gyr) and the age derived from the termination of the white dwarf cooling sequence (∼6 Gyr) are very different. One possible explanation is that as white dwarfs cool, one of the ashes of helium burning, 22Ne, sinks in the deep interior of these stars 3-5. At lower temperatures, white dwarfs are expected to crystallize and phase separation of the main constituents of the core of a typical white dwarf (12C and 16O) is expected to occur6,7. This sequence of events is expected to introduce long delays in the cooling times8,9, but has not hitherto been proven. Here we report that, as theoretically anticipated5,6, physical separation processes occur in the cores of white dwarfs, resolving the age discrepancy for NGC 6791. © 2010 Macmillan Publishers Limited. All rights reserved.Fil: García Berro, Enrique. Instituto de Estudios Espaciales de Cataluña; . Universidad Politécnica de Catalunya; EspañaFil: Torres, Santiago. Instituto de Estudios Espaciales de Cataluña; . Universidad Politécnica de Catalunya; EspañaFil: Althaus, Leandro Gabriel. Universidad Nacional de La Plata. Facultad de Ciencias Astronómicas y Geofísicas; Argentina. 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: Renedo, Isabel. Instituto de Estudios Espaciales de Cataluña; . Universidad Politécnica de Catalunya; EspañaFil: Lorén-Aguilar, Pablo. Instituto de Estudios Espaciales de Cataluña; . 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: Rohrmann, Rene Daniel. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - San Juan. Instituto de Ciencias Astronómicas, de la Tierra y del Espacio. Universidad Nacional de San Juan. Instituto de Ciencias Astronómicas, de la Tierra y del Espacio; ArgentinaFil: Salaris, Maurizio. Liverpool John Moores University;Fil: Isern, Jordi. Instituto de Estudios Espaciales de Cataluña; . Universitat Autònoma de Barcelona; EspañaNature Publishing Group2010-05info: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/11336/72283García Berro, Enrique; Torres, Santiago; Althaus, Leandro Gabriel; Renedo, Isabel; Lorén-Aguilar, Pablo; et al.; A white dwarf cooling age of 8 Gyr for NGC 6791 from physical separation processes; Nature Publishing Group; Nature; 465; 7295; 5-2010; 194-1960028-0836CONICET DigitalCONICETenginfo:eu-repo/semantics/altIdentifier/doi/10.1038/nature09045info:eu-repo/semantics/altIdentifier/url/https://www.nature.com/articles/nature09045info:eu-repo/semantics/openAccesshttps://creativecommons.org/licenses/by-nc-sa/2.5/ar/reponame:CONICET Digital (CONICET)instname:Consejo Nacional de Investigaciones Científicas y Técnicas2025-10-22T11:22:17Zoai:ri.conicet.gov.ar:11336/72283instacron: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:34982025-10-22 11:22:17.626CONICET Digital (CONICET) - Consejo Nacional de Investigaciones Científicas y Técnicasfalse
dc.title.none.fl_str_mv A white dwarf cooling age of 8 Gyr for NGC 6791 from physical separation processes
title A white dwarf cooling age of 8 Gyr for NGC 6791 from physical separation processes
spellingShingle A white dwarf cooling age of 8 Gyr for NGC 6791 from physical separation processes
García Berro, Enrique
White Dwarfs
Cosmochronology
Evolution of Stars
Interior Stars
title_short A white dwarf cooling age of 8 Gyr for NGC 6791 from physical separation processes
title_full A white dwarf cooling age of 8 Gyr for NGC 6791 from physical separation processes
title_fullStr A white dwarf cooling age of 8 Gyr for NGC 6791 from physical separation processes
title_full_unstemmed A white dwarf cooling age of 8 Gyr for NGC 6791 from physical separation processes
title_sort A white dwarf cooling age of 8 Gyr for NGC 6791 from physical separation processes
dc.creator.none.fl_str_mv García Berro, Enrique
Torres, Santiago
Althaus, Leandro Gabriel
Renedo, Isabel
Lorén-Aguilar, Pablo
Corsico, Alejandro Hugo
Rohrmann, Rene Daniel
Salaris, Maurizio
Isern, Jordi
author García Berro, Enrique
author_facet García Berro, Enrique
Torres, Santiago
Althaus, Leandro Gabriel
Renedo, Isabel
Lorén-Aguilar, Pablo
Corsico, Alejandro Hugo
Rohrmann, Rene Daniel
Salaris, Maurizio
Isern, Jordi
author_role author
author2 Torres, Santiago
Althaus, Leandro Gabriel
Renedo, Isabel
Lorén-Aguilar, Pablo
Corsico, Alejandro Hugo
Rohrmann, Rene Daniel
Salaris, Maurizio
Isern, Jordi
author2_role author
author
author
author
author
author
author
author
dc.subject.none.fl_str_mv White Dwarfs
Cosmochronology
Evolution of Stars
Interior Stars
topic White Dwarfs
Cosmochronology
Evolution of Stars
Interior Stars
purl_subject.fl_str_mv https://purl.org/becyt/ford/1.3
https://purl.org/becyt/ford/1
dc.description.none.fl_txt_mv NGC 6791 is a well studied open cluster1 that it is so close to us that can be imaged down to very faint luminosities2. The main-sequence turn-off age (∼8 Gyr) and the age derived from the termination of the white dwarf cooling sequence (∼6 Gyr) are very different. One possible explanation is that as white dwarfs cool, one of the ashes of helium burning, 22Ne, sinks in the deep interior of these stars 3-5. At lower temperatures, white dwarfs are expected to crystallize and phase separation of the main constituents of the core of a typical white dwarf (12C and 16O) is expected to occur6,7. This sequence of events is expected to introduce long delays in the cooling times8,9, but has not hitherto been proven. Here we report that, as theoretically anticipated5,6, physical separation processes occur in the cores of white dwarfs, resolving the age discrepancy for NGC 6791. © 2010 Macmillan Publishers Limited. All rights reserved.
Fil: García Berro, Enrique. Instituto de Estudios Espaciales de Cataluña; . Universidad Politécnica de Catalunya; España
Fil: Torres, Santiago. Instituto de Estudios Espaciales de Cataluña; . Universidad Politécnica de Catalunya; España
Fil: Althaus, Leandro Gabriel. Universidad Nacional de La Plata. Facultad de Ciencias Astronómicas y Geofísicas; Argentina. 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: Renedo, Isabel. Instituto de Estudios Espaciales de Cataluña; . Universidad Politécnica de Catalunya; España
Fil: Lorén-Aguilar, Pablo. Instituto de Estudios Espaciales de Cataluña; . 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: Rohrmann, Rene Daniel. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - San Juan. Instituto de Ciencias Astronómicas, de la Tierra y del Espacio. Universidad Nacional de San Juan. Instituto de Ciencias Astronómicas, de la Tierra y del Espacio; Argentina
Fil: Salaris, Maurizio. Liverpool John Moores University;
Fil: Isern, Jordi. Instituto de Estudios Espaciales de Cataluña; . Universitat Autònoma de Barcelona; España
description NGC 6791 is a well studied open cluster1 that it is so close to us that can be imaged down to very faint luminosities2. The main-sequence turn-off age (∼8 Gyr) and the age derived from the termination of the white dwarf cooling sequence (∼6 Gyr) are very different. One possible explanation is that as white dwarfs cool, one of the ashes of helium burning, 22Ne, sinks in the deep interior of these stars 3-5. At lower temperatures, white dwarfs are expected to crystallize and phase separation of the main constituents of the core of a typical white dwarf (12C and 16O) is expected to occur6,7. This sequence of events is expected to introduce long delays in the cooling times8,9, but has not hitherto been proven. Here we report that, as theoretically anticipated5,6, physical separation processes occur in the cores of white dwarfs, resolving the age discrepancy for NGC 6791. © 2010 Macmillan Publishers Limited. All rights reserved.
publishDate 2010
dc.date.none.fl_str_mv 2010-05
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/11336/72283
García Berro, Enrique; Torres, Santiago; Althaus, Leandro Gabriel; Renedo, Isabel; Lorén-Aguilar, Pablo; et al.; A white dwarf cooling age of 8 Gyr for NGC 6791 from physical separation processes; Nature Publishing Group; Nature; 465; 7295; 5-2010; 194-196
0028-0836
CONICET Digital
CONICET
url http://hdl.handle.net/11336/72283
identifier_str_mv García Berro, Enrique; Torres, Santiago; Althaus, Leandro Gabriel; Renedo, Isabel; Lorén-Aguilar, Pablo; et al.; A white dwarf cooling age of 8 Gyr for NGC 6791 from physical separation processes; Nature Publishing Group; Nature; 465; 7295; 5-2010; 194-196
0028-0836
CONICET Digital
CONICET
dc.language.none.fl_str_mv eng
language eng
dc.relation.none.fl_str_mv info:eu-repo/semantics/altIdentifier/doi/10.1038/nature09045
info:eu-repo/semantics/altIdentifier/url/https://www.nature.com/articles/nature09045
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 Nature Publishing Group
publisher.none.fl_str_mv Nature Publishing Group
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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