An ultra-massive white dwarf with a mixed hydrogen–carbon atmosphere as a likely merger remnant

Autores
Hollands, M. A.; Tremblay, P. E.; Gänsicke, B. T.; Camisassa, María Eugenia; Koester, D.; Aungwerojwit, A.; Chote, P.; Corsico, Alejandro Hugo; Dhillon, V. S.; Gentile Fusillo, N. P.; Hoskin, M. J.; Izquierdo, P.; Marsh, T. R.; Steeghs, D.
Año de publicación
2020
Idioma
inglés
Tipo de recurso
artículo
Estado
versión publicada
Descripción
White dwarfs are dense, cooling stellar embers consisting mostly of carbon and oxygen, or oxygen and neon (with a few per cent carbon) at higher initial stellar masses. These stellar cores are enveloped by a shell of helium, which in turn, is usually surrounded by a layer of hydrogen, generally prohibiting direct observation of the interior composition. However, carbon is observed at the surface of a sizeable fraction of white dwarfs, sometimes with traces of oxygen, and is thought to be dredged up from the core by a deep helium convection zone. In these objects, only traces of hydrogen are found, as large masses of hydrogen are predicted to inhibit hydrogen-helium convective mixing within the envelope. We report the identification of WD J055134.612+413531.09, an ultra-massive (1.14 solar masses (M☉)) white dwarf with a unique carbon-hydrogen mixed atmosphere (atomic ratio C/H = 0.15). Our analysis of the envelope and interior indicates that the total hydrogen and helium mass fractions must be several orders of magnitude lower than predictions of single-star evolution: less than 10-9.5 and 10-7.0, respectively. Due to the fast kinematics (129 ± 5 km s-1 relative to the local standard of rest), large mass and peculiar envelope composition, we argue that WD J0551+4135 is consistent with formation from the merger of two white dwarfs in a tight binary system.
Fil: Hollands, M. A.. University of Warwick; Reino Unido
Fil: Tremblay, P. E.. University of Warwick; Reino Unido
Fil: Gänsicke, B. T.. University of Warwick; Reino Unido
Fil: Camisassa, María Eugenia. 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: Koester, D.. Christian Albrechts Universitat Zu Kiel.; Alemania
Fil: Aungwerojwit, A.. Naresuan University; Tailandia
Fil: Chote, P.. University of Warwick; Reino Unido
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: Dhillon, V. S.. University Of Sheffield; Reino Unido
Fil: Gentile Fusillo, N. P.. University of Warwick; Reino Unido
Fil: Hoskin, M. J.. University of Warwick; Reino Unido
Fil: Izquierdo, P.. Universidad de La Laguna; España
Fil: Marsh, T. R.. University of Warwick; Reino Unido
Fil: Steeghs, D.. University of Warwick; Reino Unido
Materia
Astrophysics
Solar and Stellar Astrophysics
Nivel de accesibilidad
acceso abierto
Condiciones de uso
https://creativecommons.org/licenses/by-nc-sa/2.5/ar/
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CONICET Digital (CONICET)
Institución
Consejo Nacional de Investigaciones Científicas y Técnicas
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oai:ri.conicet.gov.ar:11336/145761
Acceder
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oai_identifier_str oai:ri.conicet.gov.ar:11336/145761
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network_name_str CONICET Digital (CONICET)
spelling An ultra-massive white dwarf with a mixed hydrogen–carbon atmosphere as a likely merger remnantHollands, M. A.Tremblay, P. E.Gänsicke, B. T.Camisassa, María EugeniaKoester, D.Aungwerojwit, A.Chote, P.Corsico, Alejandro HugoDhillon, V. S.Gentile Fusillo, N. P.Hoskin, M. J.Izquierdo, P.Marsh, T. R.Steeghs, D.AstrophysicsSolar and Stellar Astrophysicshttps://purl.org/becyt/ford/1.3https://purl.org/becyt/ford/1White dwarfs are dense, cooling stellar embers consisting mostly of carbon and oxygen, or oxygen and neon (with a few per cent carbon) at higher initial stellar masses. These stellar cores are enveloped by a shell of helium, which in turn, is usually surrounded by a layer of hydrogen, generally prohibiting direct observation of the interior composition. However, carbon is observed at the surface of a sizeable fraction of white dwarfs, sometimes with traces of oxygen, and is thought to be dredged up from the core by a deep helium convection zone. In these objects, only traces of hydrogen are found, as large masses of hydrogen are predicted to inhibit hydrogen-helium convective mixing within the envelope. We report the identification of WD J055134.612+413531.09, an ultra-massive (1.14 solar masses (M☉)) white dwarf with a unique carbon-hydrogen mixed atmosphere (atomic ratio C/H = 0.15). Our analysis of the envelope and interior indicates that the total hydrogen and helium mass fractions must be several orders of magnitude lower than predictions of single-star evolution: less than 10-9.5 and 10-7.0, respectively. Due to the fast kinematics (129 ± 5 km s-1 relative to the local standard of rest), large mass and peculiar envelope composition, we argue that WD J0551+4135 is consistent with formation from the merger of two white dwarfs in a tight binary system.Fil: Hollands, M. A.. University of Warwick; Reino UnidoFil: Tremblay, P. E.. University of Warwick; Reino UnidoFil: Gänsicke, B. T.. University of Warwick; Reino UnidoFil: Camisassa, María Eugenia. 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: Koester, D.. Christian Albrechts Universitat Zu Kiel.; AlemaniaFil: Aungwerojwit, A.. Naresuan University; TailandiaFil: Chote, P.. University of Warwick; Reino UnidoFil: 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: Dhillon, V. S.. University Of Sheffield; Reino UnidoFil: Gentile Fusillo, N. P.. University of Warwick; Reino UnidoFil: Hoskin, M. J.. University of Warwick; Reino UnidoFil: Izquierdo, P.. Universidad de La Laguna; EspañaFil: Marsh, T. R.. University of Warwick; Reino UnidoFil: Steeghs, D.. University of Warwick; Reino UnidoNature Publishing Group2020-03info: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/11336/145761Hollands, M. A.; Tremblay, P. E.; Gänsicke, B. T.; Camisassa, María Eugenia; Koester, D.; et al.; An ultra-massive white dwarf with a mixed hydrogen–carbon atmosphere as a likely merger remnant; Nature Publishing Group; Nature Astronomy; 4; 3-2020; 663–6692397-3366CONICET DigitalCONICETenginfo:eu-repo/semantics/altIdentifier/url/http://www.nature.com/articles/s41550-020-1028-0info:eu-repo/semantics/altIdentifier/doi/10.1038/s41550-020-1028-0info:eu-repo/semantics/altIdentifier/url/https://arxiv.org/abs/2003.00028#:~:text=28%20Feb%202020%5D-,An%20ultra%2Dmassive%20white%20dwarf%20with%20a%20mixed%20hydrogen%2Dcarbon,as%20a%20likely%20merger%20remnant&text=White%20dwarfs%20are%20dense%2C%20cooling,at%20higher%20initial%20stellar%20masses.info:eu-repo/semantics/openAccesshttps://creativecommons.org/licenses/by-nc-sa/2.5/ar/reponame:CONICET Digital (CONICET)instname:Consejo Nacional de Investigaciones Científicas y Técnicas2025-10-15T15:06:17Zoai:ri.conicet.gov.ar:11336/145761instacron: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:34982025-10-15 15:06:17.889CONICET Digital (CONICET) - Consejo Nacional de Investigaciones Científicas y Técnicasfalse
dc.title.none.fl_str_mv An ultra-massive white dwarf with a mixed hydrogen–carbon atmosphere as a likely merger remnant
title An ultra-massive white dwarf with a mixed hydrogen–carbon atmosphere as a likely merger remnant
spellingShingle An ultra-massive white dwarf with a mixed hydrogen–carbon atmosphere as a likely merger remnant
Hollands, M. A.
Astrophysics
Solar and Stellar Astrophysics
title_short An ultra-massive white dwarf with a mixed hydrogen–carbon atmosphere as a likely merger remnant
title_full An ultra-massive white dwarf with a mixed hydrogen–carbon atmosphere as a likely merger remnant
title_fullStr An ultra-massive white dwarf with a mixed hydrogen–carbon atmosphere as a likely merger remnant
title_full_unstemmed An ultra-massive white dwarf with a mixed hydrogen–carbon atmosphere as a likely merger remnant
title_sort An ultra-massive white dwarf with a mixed hydrogen–carbon atmosphere as a likely merger remnant
dc.creator.none.fl_str_mv Hollands, M. A.
Tremblay, P. E.
Gänsicke, B. T.
Camisassa, María Eugenia
Koester, D.
Aungwerojwit, A.
Chote, P.
Corsico, Alejandro Hugo
Dhillon, V. S.
Gentile Fusillo, N. P.
Hoskin, M. J.
Izquierdo, P.
Marsh, T. R.
Steeghs, D.
author Hollands, M. A.
author_facet Hollands, M. A.
Tremblay, P. E.
Gänsicke, B. T.
Camisassa, María Eugenia
Koester, D.
Aungwerojwit, A.
Chote, P.
Corsico, Alejandro Hugo
Dhillon, V. S.
Gentile Fusillo, N. P.
Hoskin, M. J.
Izquierdo, P.
Marsh, T. R.
Steeghs, D.
author_role author
author2 Tremblay, P. E.
Gänsicke, B. T.
Camisassa, María Eugenia
Koester, D.
Aungwerojwit, A.
Chote, P.
Corsico, Alejandro Hugo
Dhillon, V. S.
Gentile Fusillo, N. P.
Hoskin, M. J.
Izquierdo, P.
Marsh, T. R.
Steeghs, D.
author2_role author
author
author
author
author
author
author
author
author
author
author
author
author
dc.subject.none.fl_str_mv Astrophysics
Solar and Stellar Astrophysics
topic Astrophysics
Solar and Stellar Astrophysics
purl_subject.fl_str_mv https://purl.org/becyt/ford/1.3
https://purl.org/becyt/ford/1
dc.description.none.fl_txt_mv White dwarfs are dense, cooling stellar embers consisting mostly of carbon and oxygen, or oxygen and neon (with a few per cent carbon) at higher initial stellar masses. These stellar cores are enveloped by a shell of helium, which in turn, is usually surrounded by a layer of hydrogen, generally prohibiting direct observation of the interior composition. However, carbon is observed at the surface of a sizeable fraction of white dwarfs, sometimes with traces of oxygen, and is thought to be dredged up from the core by a deep helium convection zone. In these objects, only traces of hydrogen are found, as large masses of hydrogen are predicted to inhibit hydrogen-helium convective mixing within the envelope. We report the identification of WD J055134.612+413531.09, an ultra-massive (1.14 solar masses (M☉)) white dwarf with a unique carbon-hydrogen mixed atmosphere (atomic ratio C/H = 0.15). Our analysis of the envelope and interior indicates that the total hydrogen and helium mass fractions must be several orders of magnitude lower than predictions of single-star evolution: less than 10-9.5 and 10-7.0, respectively. Due to the fast kinematics (129 ± 5 km s-1 relative to the local standard of rest), large mass and peculiar envelope composition, we argue that WD J0551+4135 is consistent with formation from the merger of two white dwarfs in a tight binary system.
Fil: Hollands, M. A.. University of Warwick; Reino Unido
Fil: Tremblay, P. E.. University of Warwick; Reino Unido
Fil: Gänsicke, B. T.. University of Warwick; Reino Unido
Fil: Camisassa, María Eugenia. 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: Koester, D.. Christian Albrechts Universitat Zu Kiel.; Alemania
Fil: Aungwerojwit, A.. Naresuan University; Tailandia
Fil: Chote, P.. University of Warwick; Reino Unido
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: Dhillon, V. S.. University Of Sheffield; Reino Unido
Fil: Gentile Fusillo, N. P.. University of Warwick; Reino Unido
Fil: Hoskin, M. J.. University of Warwick; Reino Unido
Fil: Izquierdo, P.. Universidad de La Laguna; España
Fil: Marsh, T. R.. University of Warwick; Reino Unido
Fil: Steeghs, D.. University of Warwick; Reino Unido
description White dwarfs are dense, cooling stellar embers consisting mostly of carbon and oxygen, or oxygen and neon (with a few per cent carbon) at higher initial stellar masses. These stellar cores are enveloped by a shell of helium, which in turn, is usually surrounded by a layer of hydrogen, generally prohibiting direct observation of the interior composition. However, carbon is observed at the surface of a sizeable fraction of white dwarfs, sometimes with traces of oxygen, and is thought to be dredged up from the core by a deep helium convection zone. In these objects, only traces of hydrogen are found, as large masses of hydrogen are predicted to inhibit hydrogen-helium convective mixing within the envelope. We report the identification of WD J055134.612+413531.09, an ultra-massive (1.14 solar masses (M☉)) white dwarf with a unique carbon-hydrogen mixed atmosphere (atomic ratio C/H = 0.15). Our analysis of the envelope and interior indicates that the total hydrogen and helium mass fractions must be several orders of magnitude lower than predictions of single-star evolution: less than 10-9.5 and 10-7.0, respectively. Due to the fast kinematics (129 ± 5 km s-1 relative to the local standard of rest), large mass and peculiar envelope composition, we argue that WD J0551+4135 is consistent with formation from the merger of two white dwarfs in a tight binary system.
publishDate 2020
dc.date.none.fl_str_mv 2020-03
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/11336/145761
Hollands, M. A.; Tremblay, P. E.; Gänsicke, B. T.; Camisassa, María Eugenia; Koester, D.; et al.; An ultra-massive white dwarf with a mixed hydrogen–carbon atmosphere as a likely merger remnant; Nature Publishing Group; Nature Astronomy; 4; 3-2020; 663–669
2397-3366
CONICET Digital
CONICET
url http://hdl.handle.net/11336/145761
identifier_str_mv Hollands, M. A.; Tremblay, P. E.; Gänsicke, B. T.; Camisassa, María Eugenia; Koester, D.; et al.; An ultra-massive white dwarf with a mixed hydrogen–carbon atmosphere as a likely merger remnant; Nature Publishing Group; Nature Astronomy; 4; 3-2020; 663–669
2397-3366
CONICET Digital
CONICET
dc.language.none.fl_str_mv eng
language eng
dc.relation.none.fl_str_mv info:eu-repo/semantics/altIdentifier/url/http://www.nature.com/articles/s41550-020-1028-0
info:eu-repo/semantics/altIdentifier/doi/10.1038/s41550-020-1028-0
info:eu-repo/semantics/altIdentifier/url/https://arxiv.org/abs/2003.00028#:~:text=28%20Feb%202020%5D-,An%20ultra%2Dmassive%20white%20dwarf%20with%20a%20mixed%20hydrogen%2Dcarbon,as%20a%20likely%20merger%20remnant&text=White%20dwarfs%20are%20dense%2C%20cooling,at%20higher%20initial%20stellar%20masses.
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 Nature Publishing Group
publisher.none.fl_str_mv Nature Publishing Group
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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