An accurate comprehensive approach to substructure: III. Masses and formation times of the host haloes

With this paper, we complete a comprehensive study of substructure in dark matter haloes. In Paper I, we derived the radial distribution and mass function (MF) of accreted subhaloes (scaled to the radius and mass of the host halo) and showed that they are essentially universal. This is not the case,...

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Authors: Salvador Solé, Eduard, Manrique Oliva, Alberto, Canales, David, Botella Lasaga, Ignacio
Format: article
Status:Published version
Publication Date:2022
Country:España
Institution:Universidad de Barcelona
Repository:Dipòsit Digital de la UB
OAI Identifier:oai:diposit.ub.edu:2445/183856
Online Access:https://hdl.handle.net/2445/183856
Access Level:Open access
Keyword:Matèria fosca (Astronomia)
Cosmologia
Gravitació
Dark matter (Astronomy)
Cosmology
Gravitation
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spelling An accurate comprehensive approach to substructure: III. Masses and formation times of the host haloesSalvador Solé, EduardManrique Oliva, AlbertoCanales, DavidBotella Lasaga, IgnacioMatèria fosca (Astronomia)CosmologiaGravitacióDark matter (Astronomy)CosmologyGravitationWith this paper, we complete a comprehensive study of substructure in dark matter haloes. In Paper I, we derived the radial distribution and mass function (MF) of accreted subhaloes (scaled to the radius and mass of the host halo) and showed that they are essentially universal. This is not the case, however, for those of stripped subhaloes, which depend on halo mass and assembly history. In Paper II, we derived these latter properties in the simplest case of purely accreting haloes. Here, we extend the study to ordinary haloes having suffered major mergers. After showing that all the properties of substructure are encoded in the mean truncated-to-original subhalo mass ratio profile, we demonstrate that the dependence of the subhalo MF on halo mass arises from their mass-dependent concentration, while the shape of the subhalo radial distribution depends on the time of the last major merger of the host halo. In this sense, the latter property is a better probe of halo formation time than the former. Unfortunately, this is not the case for the radial distribution of satellites as this profile is essentially disconnected from subhalo stripping and the properties of accreted subhaloes are independent of the halo formation time.Royal Astronomical Society2022info:eu-repo/semantics/articleinfo:eu-repo/semantics/publishedVersionapplication/pdfhttps://hdl.handle.net/2445/183856Articles publicats en revistes (Física Quàntica i Astrofísica)reponame:Dipòsit Digital de la UBinstname:Universidad de BarcelonaInglésReproducció del document publicat a: https://doi.org/10.1093/mnras/stac067Monthly Notices of the Royal Astronomical Society, 2022, vol. 511, num. 1, p. 641-653https://doi.org/10.1093/mnras/stac067(c) Salvador Solé, Eduard et al., 2022info:eu-repo/semantics/openAccessoai:diposit.ub.edu:2445/1838562026-05-27T06:46:51Z
dc.title.none.fl_str_mv An accurate comprehensive approach to substructure: III. Masses and formation times of the host haloes
title An accurate comprehensive approach to substructure: III. Masses and formation times of the host haloes
spellingShingle An accurate comprehensive approach to substructure: III. Masses and formation times of the host haloes
Salvador Solé, Eduard
Matèria fosca (Astronomia)
Cosmologia
Gravitació
Dark matter (Astronomy)
Cosmology
Gravitation
title_short An accurate comprehensive approach to substructure: III. Masses and formation times of the host haloes
title_full An accurate comprehensive approach to substructure: III. Masses and formation times of the host haloes
title_fullStr An accurate comprehensive approach to substructure: III. Masses and formation times of the host haloes
title_full_unstemmed An accurate comprehensive approach to substructure: III. Masses and formation times of the host haloes
title_sort An accurate comprehensive approach to substructure: III. Masses and formation times of the host haloes
dc.creator.none.fl_str_mv Salvador Solé, Eduard
Manrique Oliva, Alberto
Canales, David
Botella Lasaga, Ignacio
author Salvador Solé, Eduard
author_facet Salvador Solé, Eduard
Manrique Oliva, Alberto
Canales, David
Botella Lasaga, Ignacio
author_role author
author2 Manrique Oliva, Alberto
Canales, David
Botella Lasaga, Ignacio
author2_role author
author
author
dc.subject.none.fl_str_mv Matèria fosca (Astronomia)
Cosmologia
Gravitació
Dark matter (Astronomy)
Cosmology
Gravitation
topic Matèria fosca (Astronomia)
Cosmologia
Gravitació
Dark matter (Astronomy)
Cosmology
Gravitation
description With this paper, we complete a comprehensive study of substructure in dark matter haloes. In Paper I, we derived the radial distribution and mass function (MF) of accreted subhaloes (scaled to the radius and mass of the host halo) and showed that they are essentially universal. This is not the case, however, for those of stripped subhaloes, which depend on halo mass and assembly history. In Paper II, we derived these latter properties in the simplest case of purely accreting haloes. Here, we extend the study to ordinary haloes having suffered major mergers. After showing that all the properties of substructure are encoded in the mean truncated-to-original subhalo mass ratio profile, we demonstrate that the dependence of the subhalo MF on halo mass arises from their mass-dependent concentration, while the shape of the subhalo radial distribution depends on the time of the last major merger of the host halo. In this sense, the latter property is a better probe of halo formation time than the former. Unfortunately, this is not the case for the radial distribution of satellites as this profile is essentially disconnected from subhalo stripping and the properties of accreted subhaloes are independent of the halo formation time.
publishDate 2022
dc.date.none.fl_str_mv 2022
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/2445/183856
url https://hdl.handle.net/2445/183856
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/stac067
Monthly Notices of the Royal Astronomical Society, 2022, vol. 511, num. 1, p. 641-653
https://doi.org/10.1093/mnras/stac067
dc.rights.none.fl_str_mv (c) Salvador Solé, Eduard et al., 2022
info:eu-repo/semantics/openAccess
rights_invalid_str_mv (c) Salvador Solé, Eduard et al., 2022
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 (Física Quàntica i Astrofísica)
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 15,300719

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