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 66 + 12 −24 au. New spectra of the white dwarf show calcium absorption lines suggesting that t...

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Autores: Casewell, Sarah L., Debes, J., Dupuy, T. J., Dufour, P., Bonsor, Amy, Rebassa-Mansergas, Alberto, Murillo-Ojeda, R., French, J. R., Alexander, R. D., Xu, Siyi, Martin, E., Manjavacas, E.
Tipo de recurso: artículo
Estado:Versión publicada
Fecha de publicación:2024
País:España
Institución:Consejo Superior de Investigaciones Científicas (CSIC)
Repositorio:DIGITAL.CSIC. Repositorio Institucional del CSIC
OAI Identifier:oai:digital.csic.es:10261/371315
Acceso en línea:http://hdl.handle.net/10261/371315
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, Sarah L.Debes, J.Dupuy, T. J.Dufour, P.Bonsor, AmyRebassa-Mansergas, AlbertoMurillo-Ojeda, R.French, J. R.Alexander, R. D.Xu, SiyiMartin, E.Manjavacas, E.Brown 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 66 + 12 −24 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.The National Science Foundation (United States), National Research Council (Canada), Agencia Nacional de Investigación y Desarrollo (Chile), Ministerio de Ciencia, Tecnología e Innovación (Argentina), Ministério da Ciência, Tecnologia, Inovações e Comunicações (Brazil), and Korea Astronomy and Space Science Institute (Republic of Korea). The data have been processed using dragons (Data Reduction for Astronomy from Gemini Observatory North/South). This research has also made use of the Spanish Virtual Observatory (https://svo.cab.inta-csic.es) project funded by MCIN/AEI/10.13039/501100011033 through grant PID2020-112949GB-I00. ARM acknowledges support from the AGAUR/Generalitat de Catalunya grant SGR-386/2021 and from the Spanish MINECO grant PID2020-117252GB-I00. RMO was funded by INTA through grant PRE-OBSERVATORIO. JRF acknowledges the support of a University of Leicester College of Science and Engineering Studentship. RDA acknowledges funding from the Science & Technology Facilities Council (STFC) through Consolidated Grant ST/W000857/1. T.~Dupuy acknowledges support from UKRI STFC AGP grant ST/W001209/1. SLC acknowledges support from an STFC Ernest Rutherford Fellowship ST/R003726/1.Peer reviewedOxford University PressNational Science Foundation (US)Agencia Estatal de Investigación (España)Ministerio de Ciencia, Innovación y Universidades (España)National Research Council of CanadaAgencia Nacional de Investigación y Desarrollo (Chile)Ministerio de Ciencia, Tecnología e Innovación Productiva (Argentina)Ministério da Ciência, Tecnologia e Inovação (Brasil)Korea Astronomy and Space Science InstituteAgencia Estatal de Investigación (España)Ministerio de Ciencia, Innovación y Universidades (España)Science and Technology Facilities Council (UK)Generalitat de CatalunyaUniversity of LeicesterConsejo Superior de Investigaciones Científicas [https://ror.org/02gfc7t72]202420242024info:eu-repo/semantics/articlehttp://purl.org/coar/resource_type/c_6501Publisher's versioninfo:eu-repo/semantics/publishedVersionapplication/pdfhttp://hdl.handle.net/10261/371315reponame:DIGITAL.CSIC. Repositorio Institucional del CSICinstname:Consejo Superior de Investigaciones Científicas (CSIC)Inglés#PLACEHOLDER_PARENT_METADATA_VALUE##PLACEHOLDER_PARENT_METADATA_VALUE#info:eu-repo/grantAgreement/AEI/Plan Estatal de Investigación Científica y Técnica y de Innovación 2017-2020/PID2020-117252GB-I00info:eu-repo/grantAgreement/AEI/Plan Estatal de Investigación Científica y Técnica y de Innovación 2017-2020/PID2020-112949GB-I00https://doi.org/10.1093/mnras/stae974Síinfo:eu-repo/semantics/openAccessoai:digital.csic.es:10261/3713152026-05-22T06:33:51Z
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 L.
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 L.
Debes, J.
Dupuy, T. J.
Dufour, P.
Bonsor, Amy
Rebassa-Mansergas, Alberto
Murillo-Ojeda, R.
French, J. R.
Alexander, R. D.
Xu, Siyi
Martin, E.
Manjavacas, E.
author Casewell, Sarah L.
author_facet Casewell, Sarah L.
Debes, J.
Dupuy, T. J.
Dufour, P.
Bonsor, Amy
Rebassa-Mansergas, Alberto
Murillo-Ojeda, R.
French, J. R.
Alexander, R. D.
Xu, Siyi
Martin, E.
Manjavacas, E.
author_role author
author2 Debes, J.
Dupuy, T. J.
Dufour, P.
Bonsor, Amy
Rebassa-Mansergas, Alberto
Murillo-Ojeda, R.
French, J. R.
Alexander, R. D.
Xu, Siyi
Martin, E.
Manjavacas, E.
author2_role author
author
author
author
author
author
author
author
author
author
author
dc.contributor.none.fl_str_mv National Science Foundation (US)
Agencia Estatal de Investigación (España)
Ministerio de Ciencia, Innovación y Universidades (España)
National Research Council of Canada
Agencia Nacional de Investigación y Desarrollo (Chile)
Ministerio de Ciencia, Tecnología e Innovación Productiva (Argentina)
Ministério da Ciência, Tecnologia e Inovação (Brasil)
Korea Astronomy and Space Science Institute
Agencia Estatal de Investigación (España)
Ministerio de Ciencia, Innovación y Universidades (España)
Science and Technology Facilities Council (UK)
Generalitat de Catalunya
University of Leicester
Consejo Superior de Investigaciones Científicas [https://ror.org/02gfc7t72]
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 66 + 12 −24 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
2024
dc.type.none.fl_str_mv info:eu-repo/semantics/article
http://purl.org/coar/resource_type/c_6501
Publisher's version
info:eu-repo/semantics/publishedVersion
format article
status_str publishedVersion
dc.identifier.none.fl_str_mv http://hdl.handle.net/10261/371315
url http://hdl.handle.net/10261/371315
dc.language.none.fl_str_mv Inglés
language_invalid_str_mv Inglés
dc.relation.none.fl_str_mv #PLACEHOLDER_PARENT_METADATA_VALUE#
#PLACEHOLDER_PARENT_METADATA_VALUE#
info:eu-repo/grantAgreement/AEI/Plan Estatal de Investigación Científica y Técnica y de Innovación 2017-2020/PID2020-117252GB-I00
info:eu-repo/grantAgreement/AEI/Plan Estatal de Investigación Científica y Técnica y de Innovación 2017-2020/PID2020-112949GB-I00
https://doi.org/10.1093/mnras/stae974
Sí
dc.rights.none.fl_str_mv info:eu-repo/semantics/openAccess
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:DIGITAL.CSIC. Repositorio Institucional del CSIC
instname:Consejo Superior de Investigaciones Científicas (CSIC)
instname_str Consejo Superior de Investigaciones Científicas (CSIC)
reponame_str DIGITAL.CSIC. Repositorio Institucional del CSIC
collection DIGITAL.CSIC. Repositorio Institucional del CSIC
repository.name.fl_str_mv
repository.mail.fl_str_mv
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