Milky Way satellite census. IV. Constraints on decaying dark matter from observations of Milky Way satellite galaxies

Artículo escrito por un elevado número de autores, solo se referencian el que aparece en primer lugar, el nombre del grupo de colaboración, si le hubiere, y los autores pertenecientes a la UAM

Detalles Bibliográficos
Autores: Mau, S., DES Collaboration, García-Bellido Capdevila, Juan
Tipo de recurso: artículo
Fecha de publicación:2022
País:España
Institución:Universidad Autónoma de Madrid
Repositorio:Biblos-e Archivo. Repositorio Institucional de la UAM
Idioma:inglés
OAI Identifier:oai:repositorio.uam.es:10486/706416
Acceso en línea:http://hdl.handle.net/10486/706416
https://dx.doi.org/10.3847/1538-4357/ac6e65
Access Level:acceso abierto
Palabra clave:Dark Matter
Dwarf Galaxies
Halo
Física
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oai_identifier_str oai:repositorio.uam.es:10486/706416
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repository_id_str
spelling Milky Way satellite census. IV. Constraints on decaying dark matter from observations of Milky Way satellite galaxiesMau, S.DES CollaborationGarcía-Bellido Capdevila, JuanDark MatterDwarf GalaxiesHaloFísicaArtículo escrito por un elevado número de autores, solo se referencian el que aparece en primer lugar, el nombre del grupo de colaboración, si le hubiere, y los autores pertenecientes a la UAMWe use a recent census of the Milky Way (MW) satellite galaxy population to constrain the lifetime of particle dark matter (DM). We consider two-body decaying dark matter (DDM) in which a heavy DM particle decays with lifetime τ comparable to the age of the universe to a lighter DM particle (with mass splitting ϵ) and to a dark radiation species. These decays impart a characteristic "kick velocity,"V kick = ϵc, on the DM daughter particles, significantly depleting the DM content of low-mass subhalos and making them more susceptible to tidal disruption. We fit the suppression of the present-day DDM subhalo mass function (SHMF) as a function of τ and V kick using a suite of high-resolution zoom-in simulations of MW-mass halos, and we validate this model on new DDM simulations of systems specifically chosen to resemble the MW. We implement our DDM SHMF predictions in a forward model that incorporates inhomogeneities in the spatial distribution and detectability of MW satellites and uncertainties in the mapping between galaxies and DM halos, the properties of the MW system, and the disruption of subhalos by the MW disk using an empirical model for the galaxy-halo connection. By comparing to the observed MW satellite population, we conservatively exclude DDM models with τ < 18 Gyr (29 Gyr) for V kick = 20 kms-1 (40 kms-1) at 95% confidence. These constraints are among the most stringent and robust small-scale structure limits on the DM particle lifetime and strongly disfavor DDM models that have been proposed to alleviate the Hubble and S 8 tensionsAmerican Astronomical SocietyDepartamento de Física TeóricaFacultad de Ciencias20222022-06-20research articlehttp://purl.org/coar/resource_type/c_2df8fbb1VoRhttp://purl.org/coar/version/c_970fb48d4fbd8a85info:eu-repo/semantics/articleapplication/pdfhttp://hdl.handle.net/10486/706416https://dx.doi.org/10.3847/1538-4357/ac6e65reponame:Biblos-e Archivo. Repositorio Institucional de la UAMinstname:Universidad Autónoma de MadridInglésengopen accesshttp://purl.org/coar/access_right/c_abf2info:eu-repo/semantics/openAccessoai:repositorio.uam.es:10486/7064162026-06-23T12:46:27Z
dc.title.none.fl_str_mv Milky Way satellite census. IV. Constraints on decaying dark matter from observations of Milky Way satellite galaxies
title Milky Way satellite census. IV. Constraints on decaying dark matter from observations of Milky Way satellite galaxies
spellingShingle Milky Way satellite census. IV. Constraints on decaying dark matter from observations of Milky Way satellite galaxies
Mau, S.
Dark Matter
Dwarf Galaxies
Halo
Física
title_short Milky Way satellite census. IV. Constraints on decaying dark matter from observations of Milky Way satellite galaxies
title_full Milky Way satellite census. IV. Constraints on decaying dark matter from observations of Milky Way satellite galaxies
title_fullStr Milky Way satellite census. IV. Constraints on decaying dark matter from observations of Milky Way satellite galaxies
title_full_unstemmed Milky Way satellite census. IV. Constraints on decaying dark matter from observations of Milky Way satellite galaxies
title_sort Milky Way satellite census. IV. Constraints on decaying dark matter from observations of Milky Way satellite galaxies
dc.creator.none.fl_str_mv Mau, S.
DES Collaboration
García-Bellido Capdevila, Juan
author Mau, S.
author_facet Mau, S.
DES Collaboration
García-Bellido Capdevila, Juan
author_role author
author2 DES Collaboration
García-Bellido Capdevila, Juan
author2_role author
author
dc.contributor.none.fl_str_mv Departamento de Física Teórica
Facultad de Ciencias
dc.subject.none.fl_str_mv Dark Matter
Dwarf Galaxies
Halo
Física
topic Dark Matter
Dwarf Galaxies
Halo
Física
description Artículo escrito por un elevado número de autores, solo se referencian el que aparece en primer lugar, el nombre del grupo de colaboración, si le hubiere, y los autores pertenecientes a la UAM
publishDate 2022
dc.date.none.fl_str_mv 2022
2022-06-20
dc.type.none.fl_str_mv research article
http://purl.org/coar/resource_type/c_2df8fbb1
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 http://hdl.handle.net/10486/706416
https://dx.doi.org/10.3847/1538-4357/ac6e65
url http://hdl.handle.net/10486/706416
https://dx.doi.org/10.3847/1538-4357/ac6e65
dc.language.none.fl_str_mv Inglés
eng
language_invalid_str_mv Inglés
language eng
dc.rights.none.fl_str_mv open access
http://purl.org/coar/access_right/c_abf2
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
eu_rights_str_mv openAccess
dc.format.none.fl_str_mv application/pdf
dc.publisher.none.fl_str_mv American Astronomical Society
publisher.none.fl_str_mv American Astronomical Society
dc.source.none.fl_str_mv reponame:Biblos-e Archivo. Repositorio Institucional de la UAM
instname:Universidad Autónoma de Madrid
instname_str Universidad Autónoma de Madrid
reponame_str Biblos-e Archivo. Repositorio Institucional de la UAM
collection Biblos-e Archivo. Repositorio Institucional de la UAM
repository.name.fl_str_mv
repository.mail.fl_str_mv
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score 15.300724

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