General relativistic pulsations of ultra-massive ZZ Ceti stars

Autores
Corsico, Alejandro Hugo; Boston, S. Reece; Althaus, Leandro Gabriel; Kilic, Mukremin; Kepler, S. O.; Camisassa, María Eugenia; Torres, Santiago
Año de publicación
2023
Idioma
inglés
Tipo de recurso
artículo
Estado
versión publicada
Descripción
Ultra-massive white dwarf stars are currently being discovered at a considerable rate, thanks to surveys such as the Gaia space mission. These dense and compact stellar remnants likely play a major role in type Ia supernova explosions. It is possible to probe the interiors of ultra-massive white dwarfs through asteroseismology. In the case of the most massive white dwarfs, General Relativity could affect their structure and pulsations substantially. In this work, we present results of relativistic pulsation calculations employing relativistic ultra-massive ONe-core white dwarf models with hydrogen-rich atmospheres and masses ranging from 1.29 to 1.369M⊙ with the aim of assessing the impact of General Relativity on the adiabatic gravity (g)-mode period spectrum of very-high mass ZZ Ceti stars. Employing the relativistic Cowling approximation for the pulsation analysis, we find that the critical buoyancy (Brunt-Väisälä) and acoustic (Lamb) frequencies are larger for the relativistic case, compared to the Newtonian case, due to the relativistic white dwarf models having smaller radii and higher gravities for a fixed stellar mass. In addition, the g-mode periods are shorter in the relativistic case than in the Newtonian computations, with relative differences of up to ~50 % for the highest-mass models (1.369M⊙) and for effective temperatures typical of the ZZ Ceti instability strip. Hence, the effects of General Relativity on the structure, evolution, and pulsations of white dwarfs with masses larger than ~1.29M⊙ cannot be ignored in the asteroseismological analysis of ultra-massive ZZ Ceti stars.
Fil: Corsico, Alejandro Hugo. 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: Boston, S. Reece. University of North Carolina; Estados Unidos
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: Kilic, Mukremin. Oklahoma State University; Estados Unidos
Fil: Kepler, S. O.. Universidade Federal do Rio Grande do Sul; Brasil
Fil: Camisassa, María Eugenia. Universidad Politécnica de Catalunya; España
Fil: Torres, Santiago. Universidad Politécnica de Catalunya; España
Materia
stars: evolution
stars: interiors
stars: white dwarfs
stars: pulsations
asteroseismology
relativistic processes
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:11336/235657
Acceder
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network_acronym_str CONICETDig
repository_id_str 3498
network_name_str CONICET Digital (CONICET)
spelling General relativistic pulsations of ultra-massive ZZ Ceti starsCorsico, Alejandro HugoBoston, S. ReeceAlthaus, Leandro GabrielKilic, MukreminKepler, S. O.Camisassa, María EugeniaTorres, Santiagostars: evolutionstars: interiorsstars: white dwarfsstars: pulsationsasteroseismologyrelativistic processeshttps://purl.org/becyt/ford/1.3https://purl.org/becyt/ford/1Ultra-massive white dwarf stars are currently being discovered at a considerable rate, thanks to surveys such as the Gaia space mission. These dense and compact stellar remnants likely play a major role in type Ia supernova explosions. It is possible to probe the interiors of ultra-massive white dwarfs through asteroseismology. In the case of the most massive white dwarfs, General Relativity could affect their structure and pulsations substantially. In this work, we present results of relativistic pulsation calculations employing relativistic ultra-massive ONe-core white dwarf models with hydrogen-rich atmospheres and masses ranging from 1.29 to 1.369M⊙ with the aim of assessing the impact of General Relativity on the adiabatic gravity (g)-mode period spectrum of very-high mass ZZ Ceti stars. Employing the relativistic Cowling approximation for the pulsation analysis, we find that the critical buoyancy (Brunt-Väisälä) and acoustic (Lamb) frequencies are larger for the relativistic case, compared to the Newtonian case, due to the relativistic white dwarf models having smaller radii and higher gravities for a fixed stellar mass. In addition, the g-mode periods are shorter in the relativistic case than in the Newtonian computations, with relative differences of up to ~50 % for the highest-mass models (1.369M⊙) and for effective temperatures typical of the ZZ Ceti instability strip. Hence, the effects of General Relativity on the structure, evolution, and pulsations of white dwarfs with masses larger than ~1.29M⊙ cannot be ignored in the asteroseismological analysis of ultra-massive ZZ Ceti stars.Fil: Corsico, Alejandro Hugo. 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: Boston, S. Reece. University of North Carolina; Estados UnidosFil: 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: Kilic, Mukremin. Oklahoma State University; Estados UnidosFil: Kepler, S. O.. Universidade Federal do Rio Grande do Sul; BrasilFil: Camisassa, María Eugenia. Universidad Politécnica de Catalunya; EspañaFil: Torres, Santiago. Universidad Politécnica de Catalunya; EspañaWiley Blackwell Publishing, Inc2023-10info:eu-repo/semantics/articleinfo:eu-repo/semantics/publishedVersionhttp://purl.org/coar/resource_type/c_6501info:ar-repo/semantics/articuloapplication/pdfapplication/pdfhttp://hdl.handle.net/11336/235657Corsico, Alejandro Hugo; Boston, S. Reece; Althaus, Leandro Gabriel; Kilic, Mukremin; Kepler, S. O.; et al.; General relativistic pulsations of ultra-massive ZZ Ceti stars; Wiley Blackwell Publishing, Inc; Monthly Notices of the Royal Astronomical Society; 524; 4; 10-2023; 5929-59430035-8711CONICET DigitalCONICETenginfo:eu-repo/semantics/altIdentifier/url/https://academic.oup.com/mnras/article/524/4/5929/7231806info:eu-repo/semantics/altIdentifier/doi/10.1093/mnras/stad2248info:eu-repo/semantics/openAccesshttps://creativecommons.org/licenses/by-nc-sa/2.5/ar/reponame:CONICET Digital (CONICET)instname:Consejo Nacional de Investigaciones Científicas y Técnicas2025-09-10T13:24:41Zoai:ri.conicet.gov.ar:11336/235657instacron: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:34982025-09-10 13:24:42.012CONICET Digital (CONICET) - Consejo Nacional de Investigaciones Científicas y Técnicasfalse
dc.title.none.fl_str_mv General relativistic pulsations of ultra-massive ZZ Ceti stars
title General relativistic pulsations of ultra-massive ZZ Ceti stars
spellingShingle General relativistic pulsations of ultra-massive ZZ Ceti stars
Corsico, Alejandro Hugo
stars: evolution
stars: interiors
stars: white dwarfs
stars: pulsations
asteroseismology
relativistic processes
title_short General relativistic pulsations of ultra-massive ZZ Ceti stars
title_full General relativistic pulsations of ultra-massive ZZ Ceti stars
title_fullStr General relativistic pulsations of ultra-massive ZZ Ceti stars
title_full_unstemmed General relativistic pulsations of ultra-massive ZZ Ceti stars
title_sort General relativistic pulsations of ultra-massive ZZ Ceti stars
dc.creator.none.fl_str_mv Corsico, Alejandro Hugo
Boston, S. Reece
Althaus, Leandro Gabriel
Kilic, Mukremin
Kepler, S. O.
Camisassa, María Eugenia
Torres, Santiago
author Corsico, Alejandro Hugo
author_facet Corsico, Alejandro Hugo
Boston, S. Reece
Althaus, Leandro Gabriel
Kilic, Mukremin
Kepler, S. O.
Camisassa, María Eugenia
Torres, Santiago
author_role author
author2 Boston, S. Reece
Althaus, Leandro Gabriel
Kilic, Mukremin
Kepler, S. O.
Camisassa, María Eugenia
Torres, Santiago
author2_role author
author
author
author
author
author
dc.subject.none.fl_str_mv stars: evolution
stars: interiors
stars: white dwarfs
stars: pulsations
asteroseismology
relativistic processes
topic stars: evolution
stars: interiors
stars: white dwarfs
stars: pulsations
asteroseismology
relativistic processes
purl_subject.fl_str_mv https://purl.org/becyt/ford/1.3
https://purl.org/becyt/ford/1
dc.description.none.fl_txt_mv Ultra-massive white dwarf stars are currently being discovered at a considerable rate, thanks to surveys such as the Gaia space mission. These dense and compact stellar remnants likely play a major role in type Ia supernova explosions. It is possible to probe the interiors of ultra-massive white dwarfs through asteroseismology. In the case of the most massive white dwarfs, General Relativity could affect their structure and pulsations substantially. In this work, we present results of relativistic pulsation calculations employing relativistic ultra-massive ONe-core white dwarf models with hydrogen-rich atmospheres and masses ranging from 1.29 to 1.369M⊙ with the aim of assessing the impact of General Relativity on the adiabatic gravity (g)-mode period spectrum of very-high mass ZZ Ceti stars. Employing the relativistic Cowling approximation for the pulsation analysis, we find that the critical buoyancy (Brunt-Väisälä) and acoustic (Lamb) frequencies are larger for the relativistic case, compared to the Newtonian case, due to the relativistic white dwarf models having smaller radii and higher gravities for a fixed stellar mass. In addition, the g-mode periods are shorter in the relativistic case than in the Newtonian computations, with relative differences of up to ~50 % for the highest-mass models (1.369M⊙) and for effective temperatures typical of the ZZ Ceti instability strip. Hence, the effects of General Relativity on the structure, evolution, and pulsations of white dwarfs with masses larger than ~1.29M⊙ cannot be ignored in the asteroseismological analysis of ultra-massive ZZ Ceti stars.
Fil: Corsico, Alejandro Hugo. 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: Boston, S. Reece. University of North Carolina; Estados Unidos
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: Kilic, Mukremin. Oklahoma State University; Estados Unidos
Fil: Kepler, S. O.. Universidade Federal do Rio Grande do Sul; Brasil
Fil: Camisassa, María Eugenia. Universidad Politécnica de Catalunya; España
Fil: Torres, Santiago. Universidad Politécnica de Catalunya; España
description Ultra-massive white dwarf stars are currently being discovered at a considerable rate, thanks to surveys such as the Gaia space mission. These dense and compact stellar remnants likely play a major role in type Ia supernova explosions. It is possible to probe the interiors of ultra-massive white dwarfs through asteroseismology. In the case of the most massive white dwarfs, General Relativity could affect their structure and pulsations substantially. In this work, we present results of relativistic pulsation calculations employing relativistic ultra-massive ONe-core white dwarf models with hydrogen-rich atmospheres and masses ranging from 1.29 to 1.369M⊙ with the aim of assessing the impact of General Relativity on the adiabatic gravity (g)-mode period spectrum of very-high mass ZZ Ceti stars. Employing the relativistic Cowling approximation for the pulsation analysis, we find that the critical buoyancy (Brunt-Väisälä) and acoustic (Lamb) frequencies are larger for the relativistic case, compared to the Newtonian case, due to the relativistic white dwarf models having smaller radii and higher gravities for a fixed stellar mass. In addition, the g-mode periods are shorter in the relativistic case than in the Newtonian computations, with relative differences of up to ~50 % for the highest-mass models (1.369M⊙) and for effective temperatures typical of the ZZ Ceti instability strip. Hence, the effects of General Relativity on the structure, evolution, and pulsations of white dwarfs with masses larger than ~1.29M⊙ cannot be ignored in the asteroseismological analysis of ultra-massive ZZ Ceti stars.
publishDate 2023
dc.date.none.fl_str_mv 2023-10
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/11336/235657
Corsico, Alejandro Hugo; Boston, S. Reece; Althaus, Leandro Gabriel; Kilic, Mukremin; Kepler, S. O.; et al.; General relativistic pulsations of ultra-massive ZZ Ceti stars; Wiley Blackwell Publishing, Inc; Monthly Notices of the Royal Astronomical Society; 524; 4; 10-2023; 5929-5943
0035-8711
CONICET Digital
CONICET
url http://hdl.handle.net/11336/235657
identifier_str_mv Corsico, Alejandro Hugo; Boston, S. Reece; Althaus, Leandro Gabriel; Kilic, Mukremin; Kepler, S. O.; et al.; General relativistic pulsations of ultra-massive ZZ Ceti stars; Wiley Blackwell Publishing, Inc; Monthly Notices of the Royal Astronomical Society; 524; 4; 10-2023; 5929-5943
0035-8711
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://academic.oup.com/mnras/article/524/4/5929/7231806
info:eu-repo/semantics/altIdentifier/doi/10.1093/mnras/stad2248
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 Wiley Blackwell Publishing, Inc
publisher.none.fl_str_mv Wiley Blackwell Publishing, Inc
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 12.48226

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