The ZZ Ceti Instability Strip for the Most Massive White Dwarf Pulsators

Autores
Jewett, Gracyn; Kilic, Mukremin; Moss, Adam; Corsico, Alejandro Hugo; Green, Matthew J.; Uzundag, Murat; Bergeron, Pierre; Brown, Warren R.; de Gerónimo, Francisco César; Rebassa Mansergas, Alberto; Brown, Alex J.; Dhillon, Vikram S.; Littlefair, Stuart
Año de publicación
2025
Idioma
inglés
Tipo de recurso
artículo
Estado
versión publicada
Descripción
We present time-series photometry of 31 massive DA white dwarfs with M ≳ 0.9 M⊙ within the ZZ Cetiinstability strip from the Montreal White Dwarf Database 100 pc sample. The majority of the targets had noprevious time-series photometry available, though several were classified as nonvariable or potential pulsators inthe literature. Out of the 31 candidates, we confirm 16 as pulsating. Our observations at three observatories haveled us to discover the most massive pulsating white dwarf currently known, J0959−1828 (M = 1.32 or 1.27 M⊙for a CO versus ONe core), which is slightly more massive than the previous record holder J0049−2525. Westudy the sample properties of massive ZZ Ceti white dwarfs and find several trends with their weighted meanperiods. As predicted by theory, we see an increase in the weighted mean periods with decreasing effectivetemperature and a decrease in pulsation amplitudes at the red edge of the instability strip. Furthermore, theweighted mean periods decrease with increasing stellar mass. Our observations show that the ZZ Ceti instabilitystrip may not be pure at high masses. This is likely because the nonvariable white dwarfs in the middle of the stripmay be weakly magnetic, which could escape detection in the available low-resolution spectroscopy data, but maybe sufficient to suppress pulsations. Extensive follow-up observations of the most massive white dwarfs in oursample have the potential to probe the interior structures and core compositions of these white dwarfs withsignificantly crystallized cores.
Fil: Jewett, Gracyn. Oklahoma State University; Estados Unidos
Fil: Kilic, Mukremin. Oklahoma State University; Estados Unidos
Fil: Moss, Adam. University of Florida; Estados Unidos
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: Green, Matthew J.. Oklahoma State University; Estados Unidos
Fil: Uzundag, Murat. Institute Of Astronomy; Bélgica
Fil: Bergeron, Pierre. University of Montreal; Canadá
Fil: Brown, Warren R.. Harvard-Smithsonian Center for Astrophysics; Estados Unidos
Fil: de Gerónimo, Francisco César. 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. Departament de Física Enginyeria; España
Fil: Brown, Alex J.. Universitat Hamburg; Alemania
Fil: Dhillon, Vikram S.. University Of Sheffield (university Of Sheffield);
Fil: Littlefair, Stuart. University Of Sheffield (university Of Sheffield);
Materia
ZZ Ceti stars
WHITE DWARFS STARS
STELLAR PULSATIONS
Nivel de accesibilidad
acceso abierto
Condiciones de uso
https://creativecommons.org/licenses/by/2.5/ar/
Repositorio
CONICET Digital (CONICET)
Institución
Consejo Nacional de Investigaciones Científicas y Técnicas
OAI Identificador
oai:ri.conicet.gov.ar:11336/290730
Acceder
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oai_identifier_str oai:ri.conicet.gov.ar:11336/290730
network_acronym_str CONICETDig
repository_id_str 3498
network_name_str CONICET Digital (CONICET)
spelling The ZZ Ceti Instability Strip for the Most Massive White Dwarf PulsatorsJewett, GracynKilic, MukreminMoss, AdamCorsico, Alejandro HugoGreen, Matthew J.Uzundag, MuratBergeron, PierreBrown, Warren R.de Gerónimo, Francisco CésarRebassa Mansergas, AlbertoBrown, Alex J.Dhillon, Vikram S.Littlefair, StuartZZ Ceti starsWHITE DWARFS STARSSTELLAR PULSATIONShttps://purl.org/becyt/ford/1.3https://purl.org/becyt/ford/1We present time-series photometry of 31 massive DA white dwarfs with M ≳ 0.9 M⊙ within the ZZ Cetiinstability strip from the Montreal White Dwarf Database 100 pc sample. The majority of the targets had noprevious time-series photometry available, though several were classified as nonvariable or potential pulsators inthe literature. Out of the 31 candidates, we confirm 16 as pulsating. Our observations at three observatories haveled us to discover the most massive pulsating white dwarf currently known, J0959−1828 (M = 1.32 or 1.27 M⊙for a CO versus ONe core), which is slightly more massive than the previous record holder J0049−2525. Westudy the sample properties of massive ZZ Ceti white dwarfs and find several trends with their weighted meanperiods. As predicted by theory, we see an increase in the weighted mean periods with decreasing effectivetemperature and a decrease in pulsation amplitudes at the red edge of the instability strip. Furthermore, theweighted mean periods decrease with increasing stellar mass. Our observations show that the ZZ Ceti instabilitystrip may not be pure at high masses. This is likely because the nonvariable white dwarfs in the middle of the stripmay be weakly magnetic, which could escape detection in the available low-resolution spectroscopy data, but maybe sufficient to suppress pulsations. Extensive follow-up observations of the most massive white dwarfs in oursample have the potential to probe the interior structures and core compositions of these white dwarfs withsignificantly crystallized cores.Fil: Jewett, Gracyn. Oklahoma State University; Estados UnidosFil: Kilic, Mukremin. Oklahoma State University; Estados UnidosFil: Moss, Adam. University of Florida; Estados UnidosFil: 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: Green, Matthew J.. Oklahoma State University; Estados UnidosFil: Uzundag, Murat. Institute Of Astronomy; BélgicaFil: Bergeron, Pierre. University of Montreal; CanadáFil: Brown, Warren R.. Harvard-Smithsonian Center for Astrophysics; Estados UnidosFil: de Gerónimo, Francisco César. 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. Departament de Física Enginyeria; EspañaFil: Brown, Alex J.. Universitat Hamburg; AlemaniaFil: Dhillon, Vikram S.. University Of Sheffield (university Of Sheffield);Fil: Littlefair, Stuart. University Of Sheffield (university Of Sheffield);IOP Publishing2025-12info: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/11336/290730Jewett, Gracyn; Kilic, Mukremin; Moss, Adam; Corsico, Alejandro Hugo; Green, Matthew J.; et al.; The ZZ Ceti Instability Strip for the Most Massive White Dwarf Pulsators; IOP Publishing; Astrophysical Journal; 994; 2; 12-2025; 1-280004-637XCONICET DigitalCONICETenginfo:eu-repo/semantics/altIdentifier/url/https://iopscience.iop.org/article/10.3847/1538-4357/ae100ainfo:eu-repo/semantics/altIdentifier/doi/10.3847/1538-4357/ae100ainfo:eu-repo/semantics/openAccesshttps://creativecommons.org/licenses/by/2.5/ar/reponame:CONICET Digital (CONICET)instname:Consejo Nacional de Investigaciones Científicas y Técnicas2026-08-25T15:47:01Zoai:ri.conicet.gov.ar:11336/290730instacron: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:34982026-08-25 15:47:01.328CONICET Digital (CONICET) - Consejo Nacional de Investigaciones Científicas y Técnicasfalse
dc.title.none.fl_str_mv The ZZ Ceti Instability Strip for the Most Massive White Dwarf Pulsators
title The ZZ Ceti Instability Strip for the Most Massive White Dwarf Pulsators
spellingShingle The ZZ Ceti Instability Strip for the Most Massive White Dwarf Pulsators
Jewett, Gracyn
ZZ Ceti stars
WHITE DWARFS STARS
STELLAR PULSATIONS
title_short The ZZ Ceti Instability Strip for the Most Massive White Dwarf Pulsators
title_full The ZZ Ceti Instability Strip for the Most Massive White Dwarf Pulsators
title_fullStr The ZZ Ceti Instability Strip for the Most Massive White Dwarf Pulsators
title_full_unstemmed The ZZ Ceti Instability Strip for the Most Massive White Dwarf Pulsators
title_sort The ZZ Ceti Instability Strip for the Most Massive White Dwarf Pulsators
dc.creator.none.fl_str_mv Jewett, Gracyn
Kilic, Mukremin
Moss, Adam
Corsico, Alejandro Hugo
Green, Matthew J.
Uzundag, Murat
Bergeron, Pierre
Brown, Warren R.
de Gerónimo, Francisco César
Rebassa Mansergas, Alberto
Brown, Alex J.
Dhillon, Vikram S.
Littlefair, Stuart
author Jewett, Gracyn
author_facet Jewett, Gracyn
Kilic, Mukremin
Moss, Adam
Corsico, Alejandro Hugo
Green, Matthew J.
Uzundag, Murat
Bergeron, Pierre
Brown, Warren R.
de Gerónimo, Francisco César
Rebassa Mansergas, Alberto
Brown, Alex J.
Dhillon, Vikram S.
Littlefair, Stuart
author_role author
author2 Kilic, Mukremin
Moss, Adam
Corsico, Alejandro Hugo
Green, Matthew J.
Uzundag, Murat
Bergeron, Pierre
Brown, Warren R.
de Gerónimo, Francisco César
Rebassa Mansergas, Alberto
Brown, Alex J.
Dhillon, Vikram S.
Littlefair, Stuart
author2_role author
author
author
author
author
author
author
author
author
author
author
author
dc.subject.none.fl_str_mv ZZ Ceti stars
WHITE DWARFS STARS
STELLAR PULSATIONS
topic ZZ Ceti stars
WHITE DWARFS STARS
STELLAR PULSATIONS
purl_subject.fl_str_mv https://purl.org/becyt/ford/1.3
https://purl.org/becyt/ford/1
dc.description.none.fl_txt_mv We present time-series photometry of 31 massive DA white dwarfs with M ≳ 0.9 M⊙ within the ZZ Cetiinstability strip from the Montreal White Dwarf Database 100 pc sample. The majority of the targets had noprevious time-series photometry available, though several were classified as nonvariable or potential pulsators inthe literature. Out of the 31 candidates, we confirm 16 as pulsating. Our observations at three observatories haveled us to discover the most massive pulsating white dwarf currently known, J0959−1828 (M = 1.32 or 1.27 M⊙for a CO versus ONe core), which is slightly more massive than the previous record holder J0049−2525. Westudy the sample properties of massive ZZ Ceti white dwarfs and find several trends with their weighted meanperiods. As predicted by theory, we see an increase in the weighted mean periods with decreasing effectivetemperature and a decrease in pulsation amplitudes at the red edge of the instability strip. Furthermore, theweighted mean periods decrease with increasing stellar mass. Our observations show that the ZZ Ceti instabilitystrip may not be pure at high masses. This is likely because the nonvariable white dwarfs in the middle of the stripmay be weakly magnetic, which could escape detection in the available low-resolution spectroscopy data, but maybe sufficient to suppress pulsations. Extensive follow-up observations of the most massive white dwarfs in oursample have the potential to probe the interior structures and core compositions of these white dwarfs withsignificantly crystallized cores.
Fil: Jewett, Gracyn. Oklahoma State University; Estados Unidos
Fil: Kilic, Mukremin. Oklahoma State University; Estados Unidos
Fil: Moss, Adam. University of Florida; Estados Unidos
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: Green, Matthew J.. Oklahoma State University; Estados Unidos
Fil: Uzundag, Murat. Institute Of Astronomy; Bélgica
Fil: Bergeron, Pierre. University of Montreal; Canadá
Fil: Brown, Warren R.. Harvard-Smithsonian Center for Astrophysics; Estados Unidos
Fil: de Gerónimo, Francisco César. 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. Departament de Física Enginyeria; España
Fil: Brown, Alex J.. Universitat Hamburg; Alemania
Fil: Dhillon, Vikram S.. University Of Sheffield (university Of Sheffield);
Fil: Littlefair, Stuart. University Of Sheffield (university Of Sheffield);
description We present time-series photometry of 31 massive DA white dwarfs with M ≳ 0.9 M⊙ within the ZZ Cetiinstability strip from the Montreal White Dwarf Database 100 pc sample. The majority of the targets had noprevious time-series photometry available, though several were classified as nonvariable or potential pulsators inthe literature. Out of the 31 candidates, we confirm 16 as pulsating. Our observations at three observatories haveled us to discover the most massive pulsating white dwarf currently known, J0959−1828 (M = 1.32 or 1.27 M⊙for a CO versus ONe core), which is slightly more massive than the previous record holder J0049−2525. Westudy the sample properties of massive ZZ Ceti white dwarfs and find several trends with their weighted meanperiods. As predicted by theory, we see an increase in the weighted mean periods with decreasing effectivetemperature and a decrease in pulsation amplitudes at the red edge of the instability strip. Furthermore, theweighted mean periods decrease with increasing stellar mass. Our observations show that the ZZ Ceti instabilitystrip may not be pure at high masses. This is likely because the nonvariable white dwarfs in the middle of the stripmay be weakly magnetic, which could escape detection in the available low-resolution spectroscopy data, but maybe sufficient to suppress pulsations. Extensive follow-up observations of the most massive white dwarfs in oursample have the potential to probe the interior structures and core compositions of these white dwarfs withsignificantly crystallized cores.
publishDate 2025
dc.date.none.fl_str_mv 2025-12
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/11336/290730
Jewett, Gracyn; Kilic, Mukremin; Moss, Adam; Corsico, Alejandro Hugo; Green, Matthew J.; et al.; The ZZ Ceti Instability Strip for the Most Massive White Dwarf Pulsators; IOP Publishing; Astrophysical Journal; 994; 2; 12-2025; 1-28
0004-637X
CONICET Digital
CONICET
url http://hdl.handle.net/11336/290730
identifier_str_mv Jewett, Gracyn; Kilic, Mukremin; Moss, Adam; Corsico, Alejandro Hugo; Green, Matthew J.; et al.; The ZZ Ceti Instability Strip for the Most Massive White Dwarf Pulsators; IOP Publishing; Astrophysical Journal; 994; 2; 12-2025; 1-28
0004-637X
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://iopscience.iop.org/article/10.3847/1538-4357/ae100a
info:eu-repo/semantics/altIdentifier/doi/10.3847/1538-4357/ae100a
dc.rights.none.fl_str_mv info:eu-repo/semantics/openAccess
https://creativecommons.org/licenses/by/2.5/ar/
eu_rights_str_mv openAccess
rights_invalid_str_mv https://creativecommons.org/licenses/by/2.5/ar/
dc.format.none.fl_str_mv application/pdf
application/pdf
application/pdf
dc.publisher.none.fl_str_mv IOP Publishing
publisher.none.fl_str_mv IOP Publishing
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 13.265058

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