J0526+5934: A peculiar ultra-short-period double white dwarf

Autores
Rebassa Mansergas, Alberto; Hollands, Mark; Parsons, Steven G.; Althaus, Leandro Gabriel; Pelisoli, Ingrid; Irawati, Puji; Raddi, Roberto; Camisassa, María Eugenia; Torres, Santiago
Año de publicación
2024
Idioma
inglés
Tipo de recurso
artículo
Estado
versión publicada
Descripción
Context. Ultra-short-period compact binaries are important sources of gravitational waves. The class of short-period compact binaries includes, for example, the progenitors of type Ia supernovae and the progenitors of merger episodes that may lead to massive and magnetic single white dwarfs. J0526+5934 is one such example: it is an unresolved compact binary star with an orbital period of 20.5 min.Aims: The visible component of J0526+5934 was recently claimed to be a hot sub-dwarf star with a CO white dwarf companion. Our aim is to provide strong observational and theoretical evidence that the primary star is instead an extremely low-mass white dwarf, although the hot sub-dwarf nature cannot be completely ruled out.Methods: We analysed optical spectra together with time-series photometry of the visible component of J0526+5934 to constrain its orbital and stellar parameters. We also employed evolutionary sequences for low-mass white dwarfs to derive independent values of the primary mass.Results: From the analysis of our observational data, we find a stellar mass for the primary star in J0526+5934 of 0.26 ± 0.05 M⊙, which perfectly matches the 0.237 ± 0.035 M⊙ independent measurement we derive from the theoretical evolutionary models. This value is considerably lower than the theoretically expected and generally observed mass range for hot sub-dwarf stars, but falls well within the mass limit values of extremely low-mass white dwarfs.Conclusions: We conclude J0526+5934 is the sixth ultra-short-period detached double white dwarf currently known.
Fil: Rebassa Mansergas, Alberto. Universidad Politécnica de Catalunya; España
Fil: Hollands, Mark. University of Sheffield;
Fil: Parsons, Steven G.. University of Sheffield;
Fil: Althaus, Leandro Gabriel. 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: Pelisoli, Ingrid. University of Warwick; Reino Unido
Fil: Irawati, Puji. National Astronomical Research Institute Of Thailand; Tailandia
Fil: Raddi, Roberto. Universidad Politécnica de Catalunya; España
Fil: Camisassa, María Eugenia. Universidad Politécnica de Catalunya; España. 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: Torres, Santiago. Universidad Politécnica de Catalunya; España
Materia
stars
evolution
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:11336/256905
Acceder
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network_acronym_str CONICETDig
repository_id_str 3498
network_name_str CONICET Digital (CONICET)
spelling J0526+5934: A peculiar ultra-short-period double white dwarfRebassa Mansergas, AlbertoHollands, MarkParsons, Steven G.Althaus, Leandro GabrielPelisoli, IngridIrawati, PujiRaddi, RobertoCamisassa, María EugeniaTorres, Santiagostarsevolutionpulsationshttps://purl.org/becyt/ford/1.3https://purl.org/becyt/ford/1Context. Ultra-short-period compact binaries are important sources of gravitational waves. The class of short-period compact binaries includes, for example, the progenitors of type Ia supernovae and the progenitors of merger episodes that may lead to massive and magnetic single white dwarfs. J0526+5934 is one such example: it is an unresolved compact binary star with an orbital period of 20.5 min.Aims: The visible component of J0526+5934 was recently claimed to be a hot sub-dwarf star with a CO white dwarf companion. Our aim is to provide strong observational and theoretical evidence that the primary star is instead an extremely low-mass white dwarf, although the hot sub-dwarf nature cannot be completely ruled out.Methods: We analysed optical spectra together with time-series photometry of the visible component of J0526+5934 to constrain its orbital and stellar parameters. We also employed evolutionary sequences for low-mass white dwarfs to derive independent values of the primary mass.Results: From the analysis of our observational data, we find a stellar mass for the primary star in J0526+5934 of 0.26 ± 0.05 M⊙, which perfectly matches the 0.237 ± 0.035 M⊙ independent measurement we derive from the theoretical evolutionary models. This value is considerably lower than the theoretically expected and generally observed mass range for hot sub-dwarf stars, but falls well within the mass limit values of extremely low-mass white dwarfs.Conclusions: We conclude J0526+5934 is the sixth ultra-short-period detached double white dwarf currently known.Fil: Rebassa Mansergas, Alberto. Universidad Politécnica de Catalunya; EspañaFil: Hollands, Mark. University of Sheffield;Fil: Parsons, Steven G.. University of Sheffield;Fil: Althaus, Leandro Gabriel. 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: Pelisoli, Ingrid. University of Warwick; Reino UnidoFil: Irawati, Puji. National Astronomical Research Institute Of Thailand; TailandiaFil: Raddi, Roberto. Universidad Politécnica de Catalunya; EspañaFil: Camisassa, María Eugenia. Universidad Politécnica de Catalunya; España. 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: Torres, Santiago. Universidad Politécnica de Catalunya; EspañaEDP Sciences2024-06info:eu-repo/semantics/articleinfo:eu-repo/semantics/publishedVersionhttp://purl.org/coar/resource_type/c_6501info:ar-repo/semantics/articuloapplication/pdfapplication/pdfhttp://hdl.handle.net/11336/256905Rebassa Mansergas, Alberto; Hollands, Mark; Parsons, Steven G.; Althaus, Leandro Gabriel; Pelisoli, Ingrid; et al.; J0526+5934: A peculiar ultra-short-period double white dwarf; EDP Sciences; Astronomy and Astrophysics; 686; 6-2024; 1-10; A2210004-6361CONICET DigitalCONICETenginfo:eu-repo/semantics/altIdentifier/url/https://www.aanda.org/10.1051/0004-6361/202449519info:eu-repo/semantics/altIdentifier/doi/10.1051/0004-6361/202449519info:eu-repo/semantics/openAccesshttps://creativecommons.org/licenses/by/2.5/ar/reponame:CONICET Digital (CONICET)instname:Consejo Nacional de Investigaciones Científicas y Técnicas2025-09-10T13:23:36Zoai:ri.conicet.gov.ar:11336/256905instacron: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 13:23:37.271CONICET Digital (CONICET) - Consejo Nacional de Investigaciones Científicas y Técnicasfalse
dc.title.none.fl_str_mv J0526+5934: A peculiar ultra-short-period double white dwarf
title J0526+5934: A peculiar ultra-short-period double white dwarf
spellingShingle J0526+5934: A peculiar ultra-short-period double white dwarf
Rebassa Mansergas, Alberto
stars
evolution
pulsations
title_short J0526+5934: A peculiar ultra-short-period double white dwarf
title_full J0526+5934: A peculiar ultra-short-period double white dwarf
title_fullStr J0526+5934: A peculiar ultra-short-period double white dwarf
title_full_unstemmed J0526+5934: A peculiar ultra-short-period double white dwarf
title_sort J0526+5934: A peculiar ultra-short-period double white dwarf
dc.creator.none.fl_str_mv Rebassa Mansergas, Alberto
Hollands, Mark
Parsons, Steven G.
Althaus, Leandro Gabriel
Pelisoli, Ingrid
Irawati, Puji
Raddi, Roberto
Camisassa, María Eugenia
Torres, Santiago
author Rebassa Mansergas, Alberto
author_facet Rebassa Mansergas, Alberto
Hollands, Mark
Parsons, Steven G.
Althaus, Leandro Gabriel
Pelisoli, Ingrid
Irawati, Puji
Raddi, Roberto
Camisassa, María Eugenia
Torres, Santiago
author_role author
author2 Hollands, Mark
Parsons, Steven G.
Althaus, Leandro Gabriel
Pelisoli, Ingrid
Irawati, Puji
Raddi, Roberto
Camisassa, María Eugenia
Torres, Santiago
author2_role author
author
author
author
author
author
author
author
dc.subject.none.fl_str_mv stars
evolution
pulsations
topic stars
evolution
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 Context. Ultra-short-period compact binaries are important sources of gravitational waves. The class of short-period compact binaries includes, for example, the progenitors of type Ia supernovae and the progenitors of merger episodes that may lead to massive and magnetic single white dwarfs. J0526+5934 is one such example: it is an unresolved compact binary star with an orbital period of 20.5 min.Aims: The visible component of J0526+5934 was recently claimed to be a hot sub-dwarf star with a CO white dwarf companion. Our aim is to provide strong observational and theoretical evidence that the primary star is instead an extremely low-mass white dwarf, although the hot sub-dwarf nature cannot be completely ruled out.Methods: We analysed optical spectra together with time-series photometry of the visible component of J0526+5934 to constrain its orbital and stellar parameters. We also employed evolutionary sequences for low-mass white dwarfs to derive independent values of the primary mass.Results: From the analysis of our observational data, we find a stellar mass for the primary star in J0526+5934 of 0.26 ± 0.05 M⊙, which perfectly matches the 0.237 ± 0.035 M⊙ independent measurement we derive from the theoretical evolutionary models. This value is considerably lower than the theoretically expected and generally observed mass range for hot sub-dwarf stars, but falls well within the mass limit values of extremely low-mass white dwarfs.Conclusions: We conclude J0526+5934 is the sixth ultra-short-period detached double white dwarf currently known.
Fil: Rebassa Mansergas, Alberto. Universidad Politécnica de Catalunya; España
Fil: Hollands, Mark. University of Sheffield;
Fil: Parsons, Steven G.. University of Sheffield;
Fil: Althaus, Leandro Gabriel. 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: Pelisoli, Ingrid. University of Warwick; Reino Unido
Fil: Irawati, Puji. National Astronomical Research Institute Of Thailand; Tailandia
Fil: Raddi, Roberto. Universidad Politécnica de Catalunya; España
Fil: Camisassa, María Eugenia. Universidad Politécnica de Catalunya; España. 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: Torres, Santiago. Universidad Politécnica de Catalunya; España
description Context. Ultra-short-period compact binaries are important sources of gravitational waves. The class of short-period compact binaries includes, for example, the progenitors of type Ia supernovae and the progenitors of merger episodes that may lead to massive and magnetic single white dwarfs. J0526+5934 is one such example: it is an unresolved compact binary star with an orbital period of 20.5 min.Aims: The visible component of J0526+5934 was recently claimed to be a hot sub-dwarf star with a CO white dwarf companion. Our aim is to provide strong observational and theoretical evidence that the primary star is instead an extremely low-mass white dwarf, although the hot sub-dwarf nature cannot be completely ruled out.Methods: We analysed optical spectra together with time-series photometry of the visible component of J0526+5934 to constrain its orbital and stellar parameters. We also employed evolutionary sequences for low-mass white dwarfs to derive independent values of the primary mass.Results: From the analysis of our observational data, we find a stellar mass for the primary star in J0526+5934 of 0.26 ± 0.05 M⊙, which perfectly matches the 0.237 ± 0.035 M⊙ independent measurement we derive from the theoretical evolutionary models. This value is considerably lower than the theoretically expected and generally observed mass range for hot sub-dwarf stars, but falls well within the mass limit values of extremely low-mass white dwarfs.Conclusions: We conclude J0526+5934 is the sixth ultra-short-period detached double white dwarf currently known.
publishDate 2024
dc.date.none.fl_str_mv 2024-06
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/11336/256905
Rebassa Mansergas, Alberto; Hollands, Mark; Parsons, Steven G.; Althaus, Leandro Gabriel; Pelisoli, Ingrid; et al.; J0526+5934: A peculiar ultra-short-period double white dwarf; EDP Sciences; Astronomy and Astrophysics; 686; 6-2024; 1-10; A221
0004-6361
CONICET Digital
CONICET
url http://hdl.handle.net/11336/256905
identifier_str_mv Rebassa Mansergas, Alberto; Hollands, Mark; Parsons, Steven G.; Althaus, Leandro Gabriel; Pelisoli, Ingrid; et al.; J0526+5934: A peculiar ultra-short-period double white dwarf; EDP Sciences; Astronomy and Astrophysics; 686; 6-2024; 1-10; A221
0004-6361
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://www.aanda.org/10.1051/0004-6361/202449519
info:eu-repo/semantics/altIdentifier/doi/10.1051/0004-6361/202449519
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
dc.publisher.none.fl_str_mv EDP Sciences
publisher.none.fl_str_mv EDP Sciences
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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