Discovery of the Richest Pulsating Ultramassive White Dwarf

Autores
De Gerónimo, Francisco César; Uzundag, Murat; Rebassa-Mansergas, Alberto; Brown, Alex; Kilic, Mukremin; Córsico, Alejandro Hugo; Jewett, Gracyn C.; Moss, Adam G.
Año de publicación
2025
Idioma
inglés
Tipo de recurso
artículo
Estado
versión publicada
Descripción
The discovery of pulsations in ultramassive (UM) white dwarfs (WDs) can help to probe their interiors and unveil their core composition and crystallized mass fraction through asteroseismic techniques. To date, the richest pulsating UM WD known is BPM 37093 with 8 modes detected, for which detailed asteroseismic analysis has been performed in the past. In this work, we report the discovery of 19 pulsation modes in the UM WD star WDJ0135 +5722, making it the richest pulsating hydrogen-atmosphere UM WD known to date. This object exhibits multiperiodic luminosity variations with periods ranging from 137 to 1345 s, typical of pulsating WDs in the ZZ Ceti instability strip, which is centered at Teff ∼ 12,000 K. We estimate the stellar mass of WDJ0135+5722 by different methods, resulting in M★ ∼ 1.12–1.14 M☉ if the star’s core is made of oxygen and neon or M★ ∼ 1.14–1.15 M☉ if the star hosts a carbon oxygen core. Future analysis of the star periods could shed light on the core chemical composition through asteroseismology.
Instituto de Física La Plata
Materia
Física
Ciencias Astronómicas
White dwarf stars
Stellar oscillations
ZZ Ceti stars
Nivel de accesibilidad
acceso abierto
Condiciones de uso
http://creativecommons.org/licenses/by/4.0/
Repositorio
SEDICI (UNLP)
Institución
Universidad Nacional de La Plata
OAI Identificador
oai:sedici.unlp.edu.ar:10915/189493
Acceder
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oai_identifier_str oai:sedici.unlp.edu.ar:10915/189493
network_acronym_str SEDICI
repository_id_str 1329
network_name_str SEDICI (UNLP)
spelling Discovery of the Richest Pulsating Ultramassive White DwarfDe Gerónimo, Francisco CésarUzundag, MuratRebassa-Mansergas, AlbertoBrown, AlexKilic, MukreminCórsico, Alejandro HugoJewett, Gracyn C.Moss, Adam G.FísicaCiencias AstronómicasWhite dwarf starsStellar oscillationsZZ Ceti starsThe discovery of pulsations in ultramassive (UM) white dwarfs (WDs) can help to probe their interiors and unveil their core composition and crystallized mass fraction through asteroseismic techniques. To date, the richest pulsating UM WD known is BPM 37093 with 8 modes detected, for which detailed asteroseismic analysis has been performed in the past. In this work, we report the discovery of 19 pulsation modes in the UM WD star WDJ0135 +5722, making it the richest pulsating hydrogen-atmosphere UM WD known to date. This object exhibits multiperiodic luminosity variations with periods ranging from 137 to 1345 s, typical of pulsating WDs in the ZZ Ceti instability strip, which is centered at Teff ∼ 12,000 K. We estimate the stellar mass of WDJ0135+5722 by different methods, resulting in M★ ∼ 1.12–1.14 M☉ if the star’s core is made of oxygen and neon or M★ ∼ 1.14–1.15 M☉ if the star hosts a carbon oxygen core. Future analysis of the star periods could shed light on the core chemical composition through asteroseismology.Instituto de Física La Plata2025-02info:eu-repo/semantics/articleinfo:eu-repo/semantics/publishedVersionArticulohttp://purl.org/coar/resource_type/c_6501info:ar-repo/semantics/articuloapplication/pdfhttp://sedici.unlp.edu.ar/handle/10915/189493enginfo:eu-repo/semantics/altIdentifier/issn/2041-8213info:eu-repo/semantics/altIdentifier/doi/10.3847/2041-8213/adad73info:eu-repo/semantics/openAccesshttp://creativecommons.org/licenses/by/4.0/Creative Commons Attribution 4.0 International (CC BY 4.0)reponame:SEDICI (UNLP)instname:Universidad Nacional de La Platainstacron:UNLP2026-01-07T13:36:27Zoai:sedici.unlp.edu.ar:10915/189493Institucionalhttp://sedici.unlp.edu.ar/Universidad públicaNo correspondehttp://sedici.unlp.edu.ar/oai/snrdalira@sedici.unlp.edu.arArgentinaNo correspondeNo correspondeNo correspondeopendoar:13292026-01-07 13:36:28.24SEDICI (UNLP) - Universidad Nacional de La Platafalse
dc.title.none.fl_str_mv Discovery of the Richest Pulsating Ultramassive White Dwarf
title Discovery of the Richest Pulsating Ultramassive White Dwarf
spellingShingle Discovery of the Richest Pulsating Ultramassive White Dwarf
De Gerónimo, Francisco César
Física
Ciencias Astronómicas
White dwarf stars
Stellar oscillations
ZZ Ceti stars
title_short Discovery of the Richest Pulsating Ultramassive White Dwarf
title_full Discovery of the Richest Pulsating Ultramassive White Dwarf
title_fullStr Discovery of the Richest Pulsating Ultramassive White Dwarf
title_full_unstemmed Discovery of the Richest Pulsating Ultramassive White Dwarf
title_sort Discovery of the Richest Pulsating Ultramassive White Dwarf
dc.creator.none.fl_str_mv De Gerónimo, Francisco César
Uzundag, Murat
Rebassa-Mansergas, Alberto
Brown, Alex
Kilic, Mukremin
Córsico, Alejandro Hugo
Jewett, Gracyn C.
Moss, Adam G.
author De Gerónimo, Francisco César
author_facet De Gerónimo, Francisco César
Uzundag, Murat
Rebassa-Mansergas, Alberto
Brown, Alex
Kilic, Mukremin
Córsico, Alejandro Hugo
Jewett, Gracyn C.
Moss, Adam G.
author_role author
author2 Uzundag, Murat
Rebassa-Mansergas, Alberto
Brown, Alex
Kilic, Mukremin
Córsico, Alejandro Hugo
Jewett, Gracyn C.
Moss, Adam G.
author2_role author
author
author
author
author
author
author
dc.subject.none.fl_str_mv Física
Ciencias Astronómicas
White dwarf stars
Stellar oscillations
ZZ Ceti stars
topic Física
Ciencias Astronómicas
White dwarf stars
Stellar oscillations
ZZ Ceti stars
dc.description.none.fl_txt_mv The discovery of pulsations in ultramassive (UM) white dwarfs (WDs) can help to probe their interiors and unveil their core composition and crystallized mass fraction through asteroseismic techniques. To date, the richest pulsating UM WD known is BPM 37093 with 8 modes detected, for which detailed asteroseismic analysis has been performed in the past. In this work, we report the discovery of 19 pulsation modes in the UM WD star WDJ0135 +5722, making it the richest pulsating hydrogen-atmosphere UM WD known to date. This object exhibits multiperiodic luminosity variations with periods ranging from 137 to 1345 s, typical of pulsating WDs in the ZZ Ceti instability strip, which is centered at Teff ∼ 12,000 K. We estimate the stellar mass of WDJ0135+5722 by different methods, resulting in M★ ∼ 1.12–1.14 M☉ if the star’s core is made of oxygen and neon or M★ ∼ 1.14–1.15 M☉ if the star hosts a carbon oxygen core. Future analysis of the star periods could shed light on the core chemical composition through asteroseismology.
Instituto de Física La Plata
description The discovery of pulsations in ultramassive (UM) white dwarfs (WDs) can help to probe their interiors and unveil their core composition and crystallized mass fraction through asteroseismic techniques. To date, the richest pulsating UM WD known is BPM 37093 with 8 modes detected, for which detailed asteroseismic analysis has been performed in the past. In this work, we report the discovery of 19 pulsation modes in the UM WD star WDJ0135 +5722, making it the richest pulsating hydrogen-atmosphere UM WD known to date. This object exhibits multiperiodic luminosity variations with periods ranging from 137 to 1345 s, typical of pulsating WDs in the ZZ Ceti instability strip, which is centered at Teff ∼ 12,000 K. We estimate the stellar mass of WDJ0135+5722 by different methods, resulting in M★ ∼ 1.12–1.14 M☉ if the star’s core is made of oxygen and neon or M★ ∼ 1.14–1.15 M☉ if the star hosts a carbon oxygen core. Future analysis of the star periods could shed light on the core chemical composition through asteroseismology.
publishDate 2025
dc.date.none.fl_str_mv 2025-02
dc.type.none.fl_str_mv info:eu-repo/semantics/article
info:eu-repo/semantics/publishedVersion
Articulo
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://sedici.unlp.edu.ar/handle/10915/189493
url http://sedici.unlp.edu.ar/handle/10915/189493
dc.language.none.fl_str_mv eng
language eng
dc.relation.none.fl_str_mv info:eu-repo/semantics/altIdentifier/issn/2041-8213
info:eu-repo/semantics/altIdentifier/doi/10.3847/2041-8213/adad73
dc.rights.none.fl_str_mv info:eu-repo/semantics/openAccess
http://creativecommons.org/licenses/by/4.0/
Creative Commons Attribution 4.0 International (CC BY 4.0)
eu_rights_str_mv openAccess
rights_invalid_str_mv http://creativecommons.org/licenses/by/4.0/
Creative Commons Attribution 4.0 International (CC BY 4.0)
dc.format.none.fl_str_mv application/pdf
dc.source.none.fl_str_mv reponame:SEDICI (UNLP)
instname:Universidad Nacional de La Plata
instacron:UNLP
reponame_str SEDICI (UNLP)
collection SEDICI (UNLP)
instname_str Universidad Nacional de La Plata
instacron_str UNLP
institution UNLP
repository.name.fl_str_mv SEDICI (UNLP) - Universidad Nacional de La Plata
repository.mail.fl_str_mv alira@sedici.unlp.edu.ar
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score 13.25844

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