Multimass modelling of milky way globular clusters – II. Present-day black hole populations

Populations of stellar-mass black holes (BHs) in globular clusters (GCs) influence their dynamical evolution and have importantimplications on one of the main formation channels for gravitational wave sources. Inferring the size of these populationsremains difficult, however. In this work, multimass...

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Autores: Dickson, Nolan, Smith, Peter J., Hénault-Brunet, V., Gieles, Mark, Baumgardt, Holger
Formato: artículo
Estado:Versión publicada
Fecha de publicación:2024
País:España
Recursos:Universidad de Barcelona
Repositorio:Dipòsit Digital de la UB
OAI Identifier:oai:diposit.ub.edu:2445/221114
Acesso em linha:https://hdl.handle.net/2445/221114
Access Level:acceso abierto
Palavra-chave:Cúmuls d'estels
Galàxies
Forats negres (Astronomia)
Clusters of stars
Galaxies
Black holes (Astronomy)
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spelling Multimass modelling of milky way globular clusters – II. Present-day black hole populationsDickson, NolanSmith, Peter J.Hénault-Brunet, V.Gieles, MarkBaumgardt, HolgerCúmuls d'estelsGalàxiesForats negres (Astronomia)Clusters of starsGalaxiesBlack holes (Astronomy)Populations of stellar-mass black holes (BHs) in globular clusters (GCs) influence their dynamical evolution and have importantimplications on one of the main formation channels for gravitational wave sources. Inferring the size of these populationsremains difficult, however. In this work, multimass models of 34 Milky Way GCs, first presented in Dickson et al., are used toexplore the present-day BH populations. Direct constraints on both the total and visible mass components provided by severalobservables allow these models to accurately determine the distribution of the dark mass (including BHs) within clusters, aswe demonstrate in a proof-of-concept fitting of the models to mock observations extracted from Monte Carlo cluster models.New constraints on the BH population retained to the present-day in each cluster are inferred from our models. We find thatBH mass fractions ranging from 0 to 1 per cent of the total mass are typically required to explain the observations, except forω Cen, for which we infer a mass fraction above 5 per cent, in agreement with previous works. Relationships between the darkremnant populations and other cluster parameters are examined, demonstrating a clear anticorrelation between the amount ofBHs and mass segregation between visible stars, as well as a correlation between remnant mass fractions and the dynamical ageof clusters. Our inferred BH populations are in good agreement overall with other recent studies using different methodologies,but with notable discrepancies for individual clusters.Royal Astronomical Society2024info:eu-repo/semantics/articleinfo:eu-repo/semantics/publishedVersionapplication/pdfhttps://hdl.handle.net/2445/221114Articles publicats en revistes (Institut de Ciències del Cosmos (ICCUB))reponame:Dipòsit Digital de la UBinstname:Universidad de BarcelonaInglésReproducció del document publicat a: https://doi.org/10.1093/mnras/stae470Monthly Notices of the Royal Astronomical Society, 2024, vol. 529, num.1, p. 331-347https://doi.org/10.1093/mnras/stae470cc-by (c) Dickson, Nolan et al., 2024http://creativecommons.org/licenses/by/3.0/es/info:eu-repo/semantics/openAccessoai:diposit.ub.edu:2445/2211142026-05-27T06:46:51Z
dc.title.none.fl_str_mv Multimass modelling of milky way globular clusters – II. Present-day black hole populations
title Multimass modelling of milky way globular clusters – II. Present-day black hole populations
spellingShingle Multimass modelling of milky way globular clusters – II. Present-day black hole populations
Dickson, Nolan
Cúmuls d'estels
Galàxies
Forats negres (Astronomia)
Clusters of stars
Galaxies
Black holes (Astronomy)
title_short Multimass modelling of milky way globular clusters – II. Present-day black hole populations
title_full Multimass modelling of milky way globular clusters – II. Present-day black hole populations
title_fullStr Multimass modelling of milky way globular clusters – II. Present-day black hole populations
title_full_unstemmed Multimass modelling of milky way globular clusters – II. Present-day black hole populations
title_sort Multimass modelling of milky way globular clusters – II. Present-day black hole populations
dc.creator.none.fl_str_mv Dickson, Nolan
Smith, Peter J.
Hénault-Brunet, V.
Gieles, Mark
Baumgardt, Holger
author Dickson, Nolan
author_facet Dickson, Nolan
Smith, Peter J.
Hénault-Brunet, V.
Gieles, Mark
Baumgardt, Holger
author_role author
author2 Smith, Peter J.
Hénault-Brunet, V.
Gieles, Mark
Baumgardt, Holger
author2_role author
author
author
author
dc.subject.none.fl_str_mv Cúmuls d'estels
Galàxies
Forats negres (Astronomia)
Clusters of stars
Galaxies
Black holes (Astronomy)
topic Cúmuls d'estels
Galàxies
Forats negres (Astronomia)
Clusters of stars
Galaxies
Black holes (Astronomy)
description Populations of stellar-mass black holes (BHs) in globular clusters (GCs) influence their dynamical evolution and have importantimplications on one of the main formation channels for gravitational wave sources. Inferring the size of these populationsremains difficult, however. In this work, multimass models of 34 Milky Way GCs, first presented in Dickson et al., are used toexplore the present-day BH populations. Direct constraints on both the total and visible mass components provided by severalobservables allow these models to accurately determine the distribution of the dark mass (including BHs) within clusters, aswe demonstrate in a proof-of-concept fitting of the models to mock observations extracted from Monte Carlo cluster models.New constraints on the BH population retained to the present-day in each cluster are inferred from our models. We find thatBH mass fractions ranging from 0 to 1 per cent of the total mass are typically required to explain the observations, except forω Cen, for which we infer a mass fraction above 5 per cent, in agreement with previous works. Relationships between the darkremnant populations and other cluster parameters are examined, demonstrating a clear anticorrelation between the amount ofBHs and mass segregation between visible stars, as well as a correlation between remnant mass fractions and the dynamical ageof clusters. Our inferred BH populations are in good agreement overall with other recent studies using different methodologies,but with notable discrepancies for individual clusters.
publishDate 2024
dc.date.none.fl_str_mv 2024
dc.type.none.fl_str_mv info:eu-repo/semantics/article
info:eu-repo/semantics/publishedVersion
format article
status_str publishedVersion
dc.identifier.none.fl_str_mv https://hdl.handle.net/2445/221114
url https://hdl.handle.net/2445/221114
dc.language.none.fl_str_mv Inglés
language_invalid_str_mv Inglés
dc.relation.none.fl_str_mv Reproducció del document publicat a: https://doi.org/10.1093/mnras/stae470
Monthly Notices of the Royal Astronomical Society, 2024, vol. 529, num.1, p. 331-347
https://doi.org/10.1093/mnras/stae470
dc.rights.none.fl_str_mv cc-by (c) Dickson, Nolan et al., 2024
http://creativecommons.org/licenses/by/3.0/es/
info:eu-repo/semantics/openAccess
rights_invalid_str_mv cc-by (c) Dickson, Nolan et al., 2024
http://creativecommons.org/licenses/by/3.0/es/
eu_rights_str_mv openAccess
dc.format.none.fl_str_mv application/pdf
dc.publisher.none.fl_str_mv Royal Astronomical Society
publisher.none.fl_str_mv Royal Astronomical Society
dc.source.none.fl_str_mv Articles publicats en revistes (Institut de Ciències del Cosmos (ICCUB))
reponame:Dipòsit Digital de la UB
instname:Universidad de Barcelona
instname_str Universidad de Barcelona
reponame_str Dipòsit Digital de la UB
collection Dipòsit Digital de la UB
repository.name.fl_str_mv
repository.mail.fl_str_mv
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score 15,81155

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