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
- Institución
- Consejo Nacional de Investigaciones Científicas y Técnicas
- OAI Identificador
- oai:ri.conicet.gov.ar:11336/72283
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oai:ri.conicet.gov.ar:11336/72283 |
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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 Técnicas2025-09-29T09:52:52Zoai: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:34982025-09-29 09:52:52.967CONICET 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 |
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CONICET Digital (CONICET) |
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CONICET Digital (CONICET) |
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Consejo Nacional de Investigaciones Científicas y Técnicas |
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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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1844613619966279680 |
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13.070432 |