PHL 5038AB: is the brown dwarf causing pollution of its white dwarf host star?

We present new results on PHL 5038AB, a widely separated binary system composed of a white dwarf and a brown dwarf, refining the white and brown dwarf parameters and determining the binary separation to be au. New spectra of the white dwarf show calcium absorption lines suggesting that the hydrogen-...

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Detalles Bibliográficos
Autores: Casewell, Sarah, Debes, John J., Dupuy, Trent J., Dufour, Pierre, Bonsor, Amy, Rebassa Mansergas, Alberto|||0000-0002-6153-7173, Murillo Ojeda, Raquel
Tipo de recurso: artículo
Fecha de publicación:2024
País:España
Institución:Universitat Politècnica de Catalunya (UPC)
Repositorio:UPCommons. Portal del coneixement obert de la UPC
Idioma:inglés
OAI Identifier:oai:upcommons.upc.edu:2117/426922
Acceso en línea:https://hdl.handle.net/2117/426922
https://dx.doi.org/10.1093/mnras/stae974
Access Level:acceso abierto
Palabra clave:Brown dwarfs
stars: Low-mass
White dwarfs
Infrared: stars
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spelling PHL 5038AB: is the brown dwarf causing pollution of its white dwarf host star?Casewell, SarahDebes, John J.Dupuy, Trent J.Dufour, PierreBonsor, AmyRebassa Mansergas, Alberto|||0000-0002-6153-7173Murillo Ojeda, RaquelBrown dwarfsstars: Low-massWhite dwarfsInfrared: starsWe present new results on PHL 5038AB, a widely separated binary system composed of a white dwarf and a brown dwarf, refining the white and brown dwarf parameters and determining the binary separation to be au. New spectra of the white dwarf show calcium absorption lines suggesting that the hydrogen-rich atmosphere is weakly polluted, inferring the presence of planetesimals in the system, which we determine are in an S-type orbit around the white dwarf in orbits closer than 17–32 au. We do not detect any infrared excess that would indicate the presence of a disc, suggesting that all dust present either has been totally accreted or is optically thin. In this system, we suggest that the metal pollution in the white dwarf atmosphere can be directly attributed to the presence of the brown dwarf companion disrupting the orbits of planetesimals within the system.ARM acknowledges support from the AGAUR/Generalitat de Catalunya grant SGR-386/2021 and from the Spanish MINECO grant PID2020-117252GB-I00Peer ReviewedOxford University Press20242024-04-2520252025-03-24journal articlehttp://purl.org/coar/resource_type/c_6501VoRhttp://purl.org/coar/version/c_970fb48d4fbd8a85info:eu-repo/semantics/articleapplication/pdfhttps://hdl.handle.net/2117/426922https://dx.doi.org/10.1093/mnras/stae974reponame:UPCommons. Portal del coneixement obert de la UPCinstname:Universitat Politècnica de Catalunya (UPC)InglésengAgencia Estatal de Investigación http://doi.org/10.13039/501100011033 Plan Estatal de Investigación Científica y Técnica y de Innovación 2017-2020 PID2020-117252GB-I00 ENANAS BLANCAS, ESTRELLAS DE NEUTRONES Y AGUJEROS NEGROS - FISICA DE LAS ESTRELLAS COMPACTASopen accesshttp://purl.org/coar/access_right/c_abf2Attribution 4.0 Internationalhttp://creativecommons.org/licenses/by/4.0/info:eu-repo/semantics/openAccessoai:upcommons.upc.edu:2117/4269222026-05-27T15:37:01Z
dc.title.none.fl_str_mv PHL 5038AB: is the brown dwarf causing pollution of its white dwarf host star?
title PHL 5038AB: is the brown dwarf causing pollution of its white dwarf host star?
spellingShingle PHL 5038AB: is the brown dwarf causing pollution of its white dwarf host star?
Casewell, Sarah
Brown dwarfs
stars: Low-mass
White dwarfs
Infrared: stars
title_short PHL 5038AB: is the brown dwarf causing pollution of its white dwarf host star?
title_full PHL 5038AB: is the brown dwarf causing pollution of its white dwarf host star?
title_fullStr PHL 5038AB: is the brown dwarf causing pollution of its white dwarf host star?
title_full_unstemmed PHL 5038AB: is the brown dwarf causing pollution of its white dwarf host star?
title_sort PHL 5038AB: is the brown dwarf causing pollution of its white dwarf host star?
dc.creator.none.fl_str_mv Casewell, Sarah
Debes, John J.
Dupuy, Trent J.
Dufour, Pierre
Bonsor, Amy
Rebassa Mansergas, Alberto|||0000-0002-6153-7173
Murillo Ojeda, Raquel
author Casewell, Sarah
author_facet Casewell, Sarah
Debes, John J.
Dupuy, Trent J.
Dufour, Pierre
Bonsor, Amy
Rebassa Mansergas, Alberto|||0000-0002-6153-7173
Murillo Ojeda, Raquel
author_role author
author2 Debes, John J.
Dupuy, Trent J.
Dufour, Pierre
Bonsor, Amy
Rebassa Mansergas, Alberto|||0000-0002-6153-7173
Murillo Ojeda, Raquel
author2_role author
author
author
author
author
author
dc.subject.none.fl_str_mv Brown dwarfs
stars: Low-mass
White dwarfs
Infrared: stars
topic Brown dwarfs
stars: Low-mass
White dwarfs
Infrared: stars
description We present new results on PHL 5038AB, a widely separated binary system composed of a white dwarf and a brown dwarf, refining the white and brown dwarf parameters and determining the binary separation to be au. New spectra of the white dwarf show calcium absorption lines suggesting that the hydrogen-rich atmosphere is weakly polluted, inferring the presence of planetesimals in the system, which we determine are in an S-type orbit around the white dwarf in orbits closer than 17–32 au. We do not detect any infrared excess that would indicate the presence of a disc, suggesting that all dust present either has been totally accreted or is optically thin. In this system, we suggest that the metal pollution in the white dwarf atmosphere can be directly attributed to the presence of the brown dwarf companion disrupting the orbits of planetesimals within the system.
publishDate 2024
dc.date.none.fl_str_mv 2024
2024-04-25
2025
2025-03-24
dc.type.none.fl_str_mv journal article
http://purl.org/coar/resource_type/c_6501
VoR
http://purl.org/coar/version/c_970fb48d4fbd8a85
dc.type.openaire.fl_str_mv info:eu-repo/semantics/article
format article
dc.identifier.none.fl_str_mv https://hdl.handle.net/2117/426922
https://dx.doi.org/10.1093/mnras/stae974
url https://hdl.handle.net/2117/426922
https://dx.doi.org/10.1093/mnras/stae974
dc.language.none.fl_str_mv Inglés
eng
language_invalid_str_mv Inglés
language eng
dc.relation.none.fl_str_mv Agencia Estatal de Investigación http://doi.org/10.13039/501100011033 Plan Estatal de Investigación Científica y Técnica y de Innovación 2017-2020 PID2020-117252GB-I00 ENANAS BLANCAS, ESTRELLAS DE NEUTRONES Y AGUJEROS NEGROS - FISICA DE LAS ESTRELLAS COMPACTAS
dc.rights.none.fl_str_mv open access
http://purl.org/coar/access_right/c_abf2
Attribution 4.0 International
http://creativecommons.org/licenses/by/4.0/
dc.rights.openaire.fl_str_mv info:eu-repo/semantics/openAccess
rights_invalid_str_mv open access
http://purl.org/coar/access_right/c_abf2
Attribution 4.0 International
http://creativecommons.org/licenses/by/4.0/
eu_rights_str_mv openAccess
dc.format.none.fl_str_mv application/pdf
dc.publisher.none.fl_str_mv Oxford University Press
publisher.none.fl_str_mv Oxford University Press
dc.source.none.fl_str_mv reponame:UPCommons. Portal del coneixement obert de la UPC
instname:Universitat Politècnica de Catalunya (UPC)
instname_str Universitat Politècnica de Catalunya (UPC)
reponame_str UPCommons. Portal del coneixement obert de la UPC
collection UPCommons. Portal del coneixement obert de la UPC
repository.name.fl_str_mv
repository.mail.fl_str_mv
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score 15,812429

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