White dwarf constraints on a varying G

Autores
García Berro, E.; Torres, S.; Althaus, Leandro Gabriel; Corsico, Alejandro H.; Loren Aguilar, P.; Romero, A. D.; Isern, J.
Año de publicación
2014
Idioma
inglés
Tipo de recurso
artículo
Estado
versión publicada
Descripción
A secular variation of G modifies the structure and evolutionary time scales of white dwarfs. Using an state-of-the-art stellar evolutionary code, an up-to-date pulsational code, and a detailed population synthesis code we demonstrate that the effects of a running G are obvious both in the properties of individual white dwarfs, and in those of the white dwarf populations in clusters. Specifically, we show that the white dwarf evolutionary sequences depend on both the value of dot G/G, and on the value of G when the white dwarf was born. We show as well that the pulsational properties of variable white dwarfs can be used to constrain dot G/G. Finally, we also show that the ensemble properties of of white dwarfs in clusters can also be used to set upper bounds to dot G/G. Precisely, the tightest bound -- dot G/G ˜ -1.8 10-12 yr-1 -- is obtained studying the population of the old, metal-rich, well populated, open cluster NGC 6791. Less stringent upper limits can be obtained comparing the theoretical results obtained taking into account the effects of a running G with the measured rates of change of the periods of two well studied pulsating white dwarfs, G117-B15A and R548. Using these white dwarfs we obtain dot G/G˜ -1.8× 10-10 yr-1, and dot G/G˜ -1.3× 10-10 yr-1, respectively, which although less restrictive than the previous bound, can be improved measuring the rate of change of the period of massive white dwarfs.
Fil: García Berro, E.. Universidad Politecnica de Catalunya; España. Institute for Space Studies of Catalonia; España
Fil: Torres, S.. Universidad Politecnica de Catalunya; España. Institute for Space Studies of Catalonia; España
Fil: Althaus, Leandro Gabriel. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico La Plata. Instituto de Astrofísica de La Plata; Argentina. Universidad Nacional de la Plata. Facultad de Ciencias Astronómicas y Geofísicas; Argentina
Fil: Corsico, Alejandro H.. Universidad Nacional de la Plata. Facultad de Ciencias Astronómicas y Geofísicas; Argentina. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico La Plata. Instituto de Astrofísica de La Plata; Argentina
Fil: Loren Aguilar, P.. University of Exeter. School of Physics; Reino Unido
Fil: Romero, A. D.. Universidade Federal do Rio Grande do Sul; Brasil
Fil: Isern, J.. Institute for Space Studies of Catalonia; España. Institut de Ciències de l’Espai; España
Materia
White Dwarfs
Secular Variation
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:11336/10920
Acceder
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oai_identifier_str oai:ri.conicet.gov.ar:11336/10920
network_acronym_str CONICETDig
repository_id_str 3498
network_name_str CONICET Digital (CONICET)
spelling White dwarf constraints on a varying GGarcía Berro, E.Torres, S.Althaus, Leandro GabrielCorsico, Alejandro H.Loren Aguilar, P.Romero, A. D.Isern, J.White DwarfsSecular Variationhttps://purl.org/becyt/ford/1.3https://purl.org/becyt/ford/1A secular variation of G modifies the structure and evolutionary time scales of white dwarfs. Using an state-of-the-art stellar evolutionary code, an up-to-date pulsational code, and a detailed population synthesis code we demonstrate that the effects of a running G are obvious both in the properties of individual white dwarfs, and in those of the white dwarf populations in clusters. Specifically, we show that the white dwarf evolutionary sequences depend on both the value of dot G/G, and on the value of G when the white dwarf was born. We show as well that the pulsational properties of variable white dwarfs can be used to constrain dot G/G. Finally, we also show that the ensemble properties of of white dwarfs in clusters can also be used to set upper bounds to dot G/G. Precisely, the tightest bound -- dot G/G ˜ -1.8 10-12 yr-1 -- is obtained studying the population of the old, metal-rich, well populated, open cluster NGC 6791. Less stringent upper limits can be obtained comparing the theoretical results obtained taking into account the effects of a running G with the measured rates of change of the periods of two well studied pulsating white dwarfs, G117-B15A and R548. Using these white dwarfs we obtain dot G/G˜ -1.8× 10-10 yr-1, and dot G/G˜ -1.3× 10-10 yr-1, respectively, which although less restrictive than the previous bound, can be improved measuring the rate of change of the period of massive white dwarfs.Fil: García Berro, E.. Universidad Politecnica de Catalunya; España. Institute for Space Studies of Catalonia; EspañaFil: Torres, S.. Universidad Politecnica de Catalunya; España. Institute for Space Studies of Catalonia; EspañaFil: Althaus, Leandro Gabriel. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico La Plata. Instituto de Astrofísica de La Plata; Argentina. Universidad Nacional de la Plata. Facultad de Ciencias Astronómicas y Geofísicas; ArgentinaFil: Corsico, Alejandro H.. Universidad Nacional de la Plata. Facultad de Ciencias Astronómicas y Geofísicas; Argentina. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico La Plata. Instituto de Astrofísica de La Plata; ArgentinaFil: Loren Aguilar, P.. University of Exeter. School of Physics; Reino UnidoFil: Romero, A. D.. Universidade Federal do Rio Grande do Sul; BrasilFil: Isern, J.. Institute for Space Studies of Catalonia; España. Institut de Ciències de l’Espai; EspañaIstituto Nazionale di Astrofisica2014-01info:eu-repo/semantics/articleinfo:eu-repo/semantics/publishedVersionhttp://purl.org/coar/resource_type/c_6501info:ar-repo/semantics/articuloapplication/pdfapplication/pdfapplication/pdfhttp://hdl.handle.net/11336/10920García Berro, E.; Torres, S.; Althaus, Leandro Gabriel; Corsico, Alejandro H.; Loren Aguilar, P.; et al.; White dwarf constraints on a varying G; Istituto Nazionale di Astrofisica; Memorie della Societa Astronomica Italiana; 85; 1-2014; 118-1231824-016Xenginfo:eu-repo/semantics/altIdentifier/url/http://sait.oat.ts.astro.it/MmSAI/85/PDF/118.pdfinfo:eu-repo/semantics/altIdentifier/url/http://adsabs.harvard.edu/cgi-bin/bib_query?arXiv:1308.5414info:eu-repo/semantics/openAccesshttps://creativecommons.org/licenses/by-nc-sa/2.5/ar/reponame:CONICET Digital (CONICET)instname:Consejo Nacional de Investigaciones Científicas y Técnicas2025-09-29T09:42:01Zoai:ri.conicet.gov.ar:11336/10920instacron: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 09:42:01.678CONICET Digital (CONICET) - Consejo Nacional de Investigaciones Científicas y Técnicasfalse
dc.title.none.fl_str_mv White dwarf constraints on a varying G
title White dwarf constraints on a varying G
spellingShingle White dwarf constraints on a varying G
García Berro, E.
White Dwarfs
Secular Variation
title_short White dwarf constraints on a varying G
title_full White dwarf constraints on a varying G
title_fullStr White dwarf constraints on a varying G
title_full_unstemmed White dwarf constraints on a varying G
title_sort White dwarf constraints on a varying G
dc.creator.none.fl_str_mv García Berro, E.
Torres, S.
Althaus, Leandro Gabriel
Corsico, Alejandro H.
Loren Aguilar, P.
Romero, A. D.
Isern, J.
author García Berro, E.
author_facet García Berro, E.
Torres, S.
Althaus, Leandro Gabriel
Corsico, Alejandro H.
Loren Aguilar, P.
Romero, A. D.
Isern, J.
author_role author
author2 Torres, S.
Althaus, Leandro Gabriel
Corsico, Alejandro H.
Loren Aguilar, P.
Romero, A. D.
Isern, J.
author2_role author
author
author
author
author
author
dc.subject.none.fl_str_mv White Dwarfs
Secular Variation
topic White Dwarfs
Secular Variation
purl_subject.fl_str_mv https://purl.org/becyt/ford/1.3
https://purl.org/becyt/ford/1
dc.description.none.fl_txt_mv A secular variation of G modifies the structure and evolutionary time scales of white dwarfs. Using an state-of-the-art stellar evolutionary code, an up-to-date pulsational code, and a detailed population synthesis code we demonstrate that the effects of a running G are obvious both in the properties of individual white dwarfs, and in those of the white dwarf populations in clusters. Specifically, we show that the white dwarf evolutionary sequences depend on both the value of dot G/G, and on the value of G when the white dwarf was born. We show as well that the pulsational properties of variable white dwarfs can be used to constrain dot G/G. Finally, we also show that the ensemble properties of of white dwarfs in clusters can also be used to set upper bounds to dot G/G. Precisely, the tightest bound -- dot G/G ˜ -1.8 10-12 yr-1 -- is obtained studying the population of the old, metal-rich, well populated, open cluster NGC 6791. Less stringent upper limits can be obtained comparing the theoretical results obtained taking into account the effects of a running G with the measured rates of change of the periods of two well studied pulsating white dwarfs, G117-B15A and R548. Using these white dwarfs we obtain dot G/G˜ -1.8× 10-10 yr-1, and dot G/G˜ -1.3× 10-10 yr-1, respectively, which although less restrictive than the previous bound, can be improved measuring the rate of change of the period of massive white dwarfs.
Fil: García Berro, E.. Universidad Politecnica de Catalunya; España. Institute for Space Studies of Catalonia; España
Fil: Torres, S.. Universidad Politecnica de Catalunya; España. Institute for Space Studies of Catalonia; España
Fil: Althaus, Leandro Gabriel. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico La Plata. Instituto de Astrofísica de La Plata; Argentina. Universidad Nacional de la Plata. Facultad de Ciencias Astronómicas y Geofísicas; Argentina
Fil: Corsico, Alejandro H.. Universidad Nacional de la Plata. Facultad de Ciencias Astronómicas y Geofísicas; Argentina. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico La Plata. Instituto de Astrofísica de La Plata; Argentina
Fil: Loren Aguilar, P.. University of Exeter. School of Physics; Reino Unido
Fil: Romero, A. D.. Universidade Federal do Rio Grande do Sul; Brasil
Fil: Isern, J.. Institute for Space Studies of Catalonia; España. Institut de Ciències de l’Espai; España
description A secular variation of G modifies the structure and evolutionary time scales of white dwarfs. Using an state-of-the-art stellar evolutionary code, an up-to-date pulsational code, and a detailed population synthesis code we demonstrate that the effects of a running G are obvious both in the properties of individual white dwarfs, and in those of the white dwarf populations in clusters. Specifically, we show that the white dwarf evolutionary sequences depend on both the value of dot G/G, and on the value of G when the white dwarf was born. We show as well that the pulsational properties of variable white dwarfs can be used to constrain dot G/G. Finally, we also show that the ensemble properties of of white dwarfs in clusters can also be used to set upper bounds to dot G/G. Precisely, the tightest bound -- dot G/G ˜ -1.8 10-12 yr-1 -- is obtained studying the population of the old, metal-rich, well populated, open cluster NGC 6791. Less stringent upper limits can be obtained comparing the theoretical results obtained taking into account the effects of a running G with the measured rates of change of the periods of two well studied pulsating white dwarfs, G117-B15A and R548. Using these white dwarfs we obtain dot G/G˜ -1.8× 10-10 yr-1, and dot G/G˜ -1.3× 10-10 yr-1, respectively, which although less restrictive than the previous bound, can be improved measuring the rate of change of the period of massive white dwarfs.
publishDate 2014
dc.date.none.fl_str_mv 2014-01
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/11336/10920
García Berro, E.; Torres, S.; Althaus, Leandro Gabriel; Corsico, Alejandro H.; Loren Aguilar, P.; et al.; White dwarf constraints on a varying G; Istituto Nazionale di Astrofisica; Memorie della Societa Astronomica Italiana; 85; 1-2014; 118-123
1824-016X
url http://hdl.handle.net/11336/10920
identifier_str_mv García Berro, E.; Torres, S.; Althaus, Leandro Gabriel; Corsico, Alejandro H.; Loren Aguilar, P.; et al.; White dwarf constraints on a varying G; Istituto Nazionale di Astrofisica; Memorie della Societa Astronomica Italiana; 85; 1-2014; 118-123
1824-016X
dc.language.none.fl_str_mv eng
language eng
dc.relation.none.fl_str_mv info:eu-repo/semantics/altIdentifier/url/http://sait.oat.ts.astro.it/MmSAI/85/PDF/118.pdf
info:eu-repo/semantics/altIdentifier/url/http://adsabs.harvard.edu/cgi-bin/bib_query?arXiv:1308.5414
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
dc.publisher.none.fl_str_mv Istituto Nazionale di Astrofisica
publisher.none.fl_str_mv Istituto Nazionale di Astrofisica
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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