Constraining the shape of dark matter haloes using only starlight

Autores
Sánchez Almeida, Jorge; Trujillo, Ignacio; Montes, Mireia; Plastino, Ángel Ricardo
Año de publicación
2025
Idioma
inglés
Tipo de recurso
artículo
Estado
versión publicada
Descripción
We present a new technique to constrain the gravitational potential of a galaxy from the observed stellar mass surface density alone under a number of assumptions. It uses the classical Eddington inversion method to compute the phase-space distribution function (DF) needed for stars to reside in a given gravitational potential. In essence, each potential defines a set of density profiles, and it is the expansion of the observed profile in this database that provides the DF. If the required DF becomes negative, then the potential is inconsistent with the observed stars and can be discarded. It is particularly well suited for analyzing low-mass low surface brightness galaxies, where photometric but not spectroscopic data can be obtained. The recently discovered low surface brightness galaxy Nube was used to showcase its application. For Nube´s observed stellar core to be reproduced with a non-negative DF, cuspy NFW (Navarro, Frenk, and White) potentials are highly disfavored compared with potentials that have cores (Schuster-Plummer or ho230). The methodassumes the stellar system to have spherical symmetry and isotropic velocity distribution; however, we discuss simple extensions that relax the need for isotropy and may help to drop the spherical symmetry assumption.
Fil: Sánchez Almeida, Jorge. Universidad de La Laguna; España
Fil: Trujillo, Ignacio. Universidad de La Laguna; España
Fil: Montes, Mireia. No especifíca;
Fil: Plastino, Ángel Ricardo. Consejo Nacional de Investigaciones Científicas y Técnicas; Argentina. Universidad Nacional del Noroeste de la Provincia de Buenos Aires; Argentina
Materia
Dwarf Galaxies
Galactic Halos
Galaxy Nube
Dark Matter
Nivel de accesibilidad
acceso abierto
Condiciones de uso
https://creativecommons.org/licenses/by-nc-sa/2.5/ar/
Repositorio
CONICET Digital (CONICET)
Institución
Consejo Nacional de Investigaciones Científicas y Técnicas
OAI Identificador
oai:ri.conicet.gov.ar:11336/263849
Acceder
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oai_identifier_str oai:ri.conicet.gov.ar:11336/263849
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network_name_str CONICET Digital (CONICET)
spelling Constraining the shape of dark matter haloes using only starlightSánchez Almeida, JorgeTrujillo, IgnacioMontes, MireiaPlastino, Ángel RicardoDwarf GalaxiesGalactic HalosGalaxy NubeDark Matterhttps://purl.org/becyt/ford/1.3https://purl.org/becyt/ford/1https://purl.org/becyt/ford/1.3https://purl.org/becyt/ford/1We present a new technique to constrain the gravitational potential of a galaxy from the observed stellar mass surface density alone under a number of assumptions. It uses the classical Eddington inversion method to compute the phase-space distribution function (DF) needed for stars to reside in a given gravitational potential. In essence, each potential defines a set of density profiles, and it is the expansion of the observed profile in this database that provides the DF. If the required DF becomes negative, then the potential is inconsistent with the observed stars and can be discarded. It is particularly well suited for analyzing low-mass low surface brightness galaxies, where photometric but not spectroscopic data can be obtained. The recently discovered low surface brightness galaxy Nube was used to showcase its application. For Nube´s observed stellar core to be reproduced with a non-negative DF, cuspy NFW (Navarro, Frenk, and White) potentials are highly disfavored compared with potentials that have cores (Schuster-Plummer or ho230). The methodassumes the stellar system to have spherical symmetry and isotropic velocity distribution; however, we discuss simple extensions that relax the need for isotropy and may help to drop the spherical symmetry assumption.Fil: Sánchez Almeida, Jorge. Universidad de La Laguna; EspañaFil: Trujillo, Ignacio. Universidad de La Laguna; EspañaFil: Montes, Mireia. No especifíca;Fil: Plastino, Ángel Ricardo. Consejo Nacional de Investigaciones Científicas y Técnicas; Argentina. Universidad Nacional del Noroeste de la Provincia de Buenos Aires; ArgentinaEDP Sciences2025-02info:eu-repo/semantics/articleinfo:eu-repo/semantics/publishedVersionhttp://purl.org/coar/resource_type/c_6501info:ar-repo/semantics/articuloapplication/pdfapplication/pdfhttp://hdl.handle.net/11336/263849Sánchez Almeida, Jorge; Trujillo, Ignacio; Montes, Mireia; Plastino, Ángel Ricardo; Constraining the shape of dark matter haloes using only starlight; EDP Sciences; Astronomy and Astrophysics; 694; 2-2025; 1-150004-6361CONICET DigitalCONICETenginfo:eu-repo/semantics/altIdentifier/url/https://www.aanda.org/10.1051/0004-6361/202452364info:eu-repo/semantics/altIdentifier/doi/10.1051/0004-6361/202452364info:eu-repo/semantics/openAccesshttps://creativecommons.org/licenses/by-nc-sa/2.5/ar/reponame:CONICET Digital (CONICET)instname:Consejo Nacional de Investigaciones Científicas y Técnicas2025-09-03T09:44:17Zoai:ri.conicet.gov.ar:11336/263849instacron:CONICETInstitucionalhttp://ri.conicet.gov.ar/Organismo científico-tecnológicoNo correspondehttp://ri.conicet.gov.ar/oai/requestdasensio@conicet.gov.ar; lcarlino@conicet.gov.arArgentinaNo correspondeNo correspondeNo correspondeopendoar:34982025-09-03 09:44:18.285CONICET Digital (CONICET) - Consejo Nacional de Investigaciones Científicas y Técnicasfalse
dc.title.none.fl_str_mv Constraining the shape of dark matter haloes using only starlight
title Constraining the shape of dark matter haloes using only starlight
spellingShingle Constraining the shape of dark matter haloes using only starlight
Sánchez Almeida, Jorge
Dwarf Galaxies
Galactic Halos
Galaxy Nube
Dark Matter
title_short Constraining the shape of dark matter haloes using only starlight
title_full Constraining the shape of dark matter haloes using only starlight
title_fullStr Constraining the shape of dark matter haloes using only starlight
title_full_unstemmed Constraining the shape of dark matter haloes using only starlight
title_sort Constraining the shape of dark matter haloes using only starlight
dc.creator.none.fl_str_mv Sánchez Almeida, Jorge
Trujillo, Ignacio
Montes, Mireia
Plastino, Ángel Ricardo
author Sánchez Almeida, Jorge
author_facet Sánchez Almeida, Jorge
Trujillo, Ignacio
Montes, Mireia
Plastino, Ángel Ricardo
author_role author
author2 Trujillo, Ignacio
Montes, Mireia
Plastino, Ángel Ricardo
author2_role author
author
author
dc.subject.none.fl_str_mv Dwarf Galaxies
Galactic Halos
Galaxy Nube
Dark Matter
topic Dwarf Galaxies
Galactic Halos
Galaxy Nube
Dark Matter
purl_subject.fl_str_mv https://purl.org/becyt/ford/1.3
https://purl.org/becyt/ford/1
https://purl.org/becyt/ford/1.3
https://purl.org/becyt/ford/1
dc.description.none.fl_txt_mv We present a new technique to constrain the gravitational potential of a galaxy from the observed stellar mass surface density alone under a number of assumptions. It uses the classical Eddington inversion method to compute the phase-space distribution function (DF) needed for stars to reside in a given gravitational potential. In essence, each potential defines a set of density profiles, and it is the expansion of the observed profile in this database that provides the DF. If the required DF becomes negative, then the potential is inconsistent with the observed stars and can be discarded. It is particularly well suited for analyzing low-mass low surface brightness galaxies, where photometric but not spectroscopic data can be obtained. The recently discovered low surface brightness galaxy Nube was used to showcase its application. For Nube´s observed stellar core to be reproduced with a non-negative DF, cuspy NFW (Navarro, Frenk, and White) potentials are highly disfavored compared with potentials that have cores (Schuster-Plummer or ho230). The methodassumes the stellar system to have spherical symmetry and isotropic velocity distribution; however, we discuss simple extensions that relax the need for isotropy and may help to drop the spherical symmetry assumption.
Fil: Sánchez Almeida, Jorge. Universidad de La Laguna; España
Fil: Trujillo, Ignacio. Universidad de La Laguna; España
Fil: Montes, Mireia. No especifíca;
Fil: Plastino, Ángel Ricardo. Consejo Nacional de Investigaciones Científicas y Técnicas; Argentina. Universidad Nacional del Noroeste de la Provincia de Buenos Aires; Argentina
description We present a new technique to constrain the gravitational potential of a galaxy from the observed stellar mass surface density alone under a number of assumptions. It uses the classical Eddington inversion method to compute the phase-space distribution function (DF) needed for stars to reside in a given gravitational potential. In essence, each potential defines a set of density profiles, and it is the expansion of the observed profile in this database that provides the DF. If the required DF becomes negative, then the potential is inconsistent with the observed stars and can be discarded. It is particularly well suited for analyzing low-mass low surface brightness galaxies, where photometric but not spectroscopic data can be obtained. The recently discovered low surface brightness galaxy Nube was used to showcase its application. For Nube´s observed stellar core to be reproduced with a non-negative DF, cuspy NFW (Navarro, Frenk, and White) potentials are highly disfavored compared with potentials that have cores (Schuster-Plummer or ho230). The methodassumes the stellar system to have spherical symmetry and isotropic velocity distribution; however, we discuss simple extensions that relax the need for isotropy and may help to drop the spherical symmetry assumption.
publishDate 2025
dc.date.none.fl_str_mv 2025-02
dc.type.none.fl_str_mv info:eu-repo/semantics/article
info:eu-repo/semantics/publishedVersion
http://purl.org/coar/resource_type/c_6501
info:ar-repo/semantics/articulo
format article
status_str publishedVersion
dc.identifier.none.fl_str_mv http://hdl.handle.net/11336/263849
Sánchez Almeida, Jorge; Trujillo, Ignacio; Montes, Mireia; Plastino, Ángel Ricardo; Constraining the shape of dark matter haloes using only starlight; EDP Sciences; Astronomy and Astrophysics; 694; 2-2025; 1-15
0004-6361
CONICET Digital
CONICET
url http://hdl.handle.net/11336/263849
identifier_str_mv Sánchez Almeida, Jorge; Trujillo, Ignacio; Montes, Mireia; Plastino, Ángel Ricardo; Constraining the shape of dark matter haloes using only starlight; EDP Sciences; Astronomy and Astrophysics; 694; 2-2025; 1-15
0004-6361
CONICET Digital
CONICET
dc.language.none.fl_str_mv eng
language eng
dc.relation.none.fl_str_mv info:eu-repo/semantics/altIdentifier/url/https://www.aanda.org/10.1051/0004-6361/202452364
info:eu-repo/semantics/altIdentifier/doi/10.1051/0004-6361/202452364
dc.rights.none.fl_str_mv info:eu-repo/semantics/openAccess
https://creativecommons.org/licenses/by-nc-sa/2.5/ar/
eu_rights_str_mv openAccess
rights_invalid_str_mv https://creativecommons.org/licenses/by-nc-sa/2.5/ar/
dc.format.none.fl_str_mv application/pdf
application/pdf
dc.publisher.none.fl_str_mv EDP Sciences
publisher.none.fl_str_mv EDP Sciences
dc.source.none.fl_str_mv reponame:CONICET Digital (CONICET)
instname:Consejo Nacional de Investigaciones Científicas y Técnicas
reponame_str CONICET Digital (CONICET)
collection CONICET Digital (CONICET)
instname_str Consejo Nacional de Investigaciones Científicas y Técnicas
repository.name.fl_str_mv CONICET Digital (CONICET) - Consejo Nacional de Investigaciones Científicas y Técnicas
repository.mail.fl_str_mv dasensio@conicet.gov.ar; lcarlino@conicet.gov.ar
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score 13.13397

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