The principle of maximum entropy explains the cores observed in the mass distribution of dwarf galaxies

Autores
Sánchez Almeida, Jorge; Trujillo, Ignacio; Plastino, Ángel Ricardo
Año de publicación
2020
Idioma
inglés
Tipo de recurso
artículo
Estado
versión publicada
Descripción
Cold dark matter (CDM) simulations predict a central cusp in the mass distribution of galaxies. This prediction is in stark contrast with observations of dwarf galaxies that show a central plateau or "core"in their density distribution. The proposed solutions to this core-cusp problem can be classified into two types. One invokes feedback mechanisms produced by the baryonic component of the galaxies and the other assumes that the properties of the dark matter particle depart from the CDM hypothesis. Here we propose an alternative yet complementary explanation. We argue that cores are unavoidable in the self-gravitating systems of maximum entropy that result from non-extensive statistical mechanics. Their structure follows from the Tsallis entropy, which is attributed to systems with long-range interactions. Strikingly, the mass density profiles predicted by such thermodynamic equilibrium match the observed cores without any adjustment or tuning. Thus, the principle of maximum Tsallis entropy explains the presence of cores in dwarf galaxies.
Fil: Sánchez Almeida, Jorge. Instituto Astrofisico de Canarias; España. Universidad de La Laguna; España
Fil: Trujillo, Ignacio. Instituto Astrofisico de Canarias; España. Universidad de La Laguna; España
Fil: Plastino, Ángel Ricardo. Universidad Nacional del Noroeste de la Provincia de Buenos Aires. Centro de Bioinvestigaciones (Sede Pergamino); Argentina. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro de Investigaciones y Transferencia del Noroeste de la Provincia de Buenos Aires. Universidad Nacional del Noroeste de la Provincia de Buenos Aires. Centro de Investigaciones y Transferencia del Noroeste de la Provincia de Buenos Aires; Argentina
Materia
DARK MATTER
GALAXIES: DWARF
GALAXIES: FUNDAMENTAL PARAMETERS
GALAXIES: STRUCTURE
GRAVITATION
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:11336/153608
Acceder
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network_name_str CONICET Digital (CONICET)
spelling The principle of maximum entropy explains the cores observed in the mass distribution of dwarf galaxiesSánchez Almeida, JorgeTrujillo, IgnacioPlastino, Ángel RicardoDARK MATTERGALAXIES: DWARFGALAXIES: FUNDAMENTAL PARAMETERSGALAXIES: STRUCTUREGRAVITATIONhttps://purl.org/becyt/ford/1.3https://purl.org/becyt/ford/1Cold dark matter (CDM) simulations predict a central cusp in the mass distribution of galaxies. This prediction is in stark contrast with observations of dwarf galaxies that show a central plateau or "core"in their density distribution. The proposed solutions to this core-cusp problem can be classified into two types. One invokes feedback mechanisms produced by the baryonic component of the galaxies and the other assumes that the properties of the dark matter particle depart from the CDM hypothesis. Here we propose an alternative yet complementary explanation. We argue that cores are unavoidable in the self-gravitating systems of maximum entropy that result from non-extensive statistical mechanics. Their structure follows from the Tsallis entropy, which is attributed to systems with long-range interactions. Strikingly, the mass density profiles predicted by such thermodynamic equilibrium match the observed cores without any adjustment or tuning. Thus, the principle of maximum Tsallis entropy explains the presence of cores in dwarf galaxies.Fil: Sánchez Almeida, Jorge. Instituto Astrofisico de Canarias; España. Universidad de La Laguna; EspañaFil: Trujillo, Ignacio. Instituto Astrofisico de Canarias; España. Universidad de La Laguna; EspañaFil: Plastino, Ángel Ricardo. Universidad Nacional del Noroeste de la Provincia de Buenos Aires. Centro de Bioinvestigaciones (Sede Pergamino); Argentina. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro de Investigaciones y Transferencia del Noroeste de la Provincia de Buenos Aires. Universidad Nacional del Noroeste de la Provincia de Buenos Aires. Centro de Investigaciones y Transferencia del Noroeste de la Provincia de Buenos Aires; ArgentinaEDP Sciences2020-10info:eu-repo/semantics/articleinfo:eu-repo/semantics/publishedVersionhttp://purl.org/coar/resource_type/c_6501info:ar-repo/semantics/articuloapplication/pdfapplication/pdfhttp://hdl.handle.net/11336/153608Sánchez Almeida, Jorge; Trujillo, Ignacio; Plastino, Ángel Ricardo; The principle of maximum entropy explains the cores observed in the mass distribution of dwarf galaxies; EDP Sciences; Astronomy and Astrophysics; 642; 10-2020; 1-30004-63611432-0746CONICET DigitalCONICETenginfo:eu-repo/semantics/altIdentifier/url/https://www.aanda.org/articles/aa/full_html/2020/10/aa39190-20/aa39190-20.htmlinfo:eu-repo/semantics/altIdentifier/doi/10.1051/0004-6361/202039190info:eu-repo/semantics/altIdentifier/url/https://arxiv.org/abs/2009.08994#:~:text=Strikingly%2C%20the%20mass%20density%20profiles,of%20cores%20in%20dwarf%20galaxies.info:eu-repo/semantics/openAccesshttps://creativecommons.org/licenses/by-nc-sa/2.5/ar/reponame:CONICET Digital (CONICET)instname:Consejo Nacional de Investigaciones Científicas y Técnicas2025-09-03T09:44:03Zoai:ri.conicet.gov.ar:11336/153608instacron: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 09:44:04.098CONICET Digital (CONICET) - Consejo Nacional de Investigaciones Científicas y Técnicasfalse
dc.title.none.fl_str_mv The principle of maximum entropy explains the cores observed in the mass distribution of dwarf galaxies
title The principle of maximum entropy explains the cores observed in the mass distribution of dwarf galaxies
spellingShingle The principle of maximum entropy explains the cores observed in the mass distribution of dwarf galaxies
Sánchez Almeida, Jorge
DARK MATTER
GALAXIES: DWARF
GALAXIES: FUNDAMENTAL PARAMETERS
GALAXIES: STRUCTURE
GRAVITATION
title_short The principle of maximum entropy explains the cores observed in the mass distribution of dwarf galaxies
title_full The principle of maximum entropy explains the cores observed in the mass distribution of dwarf galaxies
title_fullStr The principle of maximum entropy explains the cores observed in the mass distribution of dwarf galaxies
title_full_unstemmed The principle of maximum entropy explains the cores observed in the mass distribution of dwarf galaxies
title_sort The principle of maximum entropy explains the cores observed in the mass distribution of dwarf galaxies
dc.creator.none.fl_str_mv Sánchez Almeida, Jorge
Trujillo, Ignacio
Plastino, Ángel Ricardo
author Sánchez Almeida, Jorge
author_facet Sánchez Almeida, Jorge
Trujillo, Ignacio
Plastino, Ángel Ricardo
author_role author
author2 Trujillo, Ignacio
Plastino, Ángel Ricardo
author2_role author
author
dc.subject.none.fl_str_mv DARK MATTER
GALAXIES: DWARF
GALAXIES: FUNDAMENTAL PARAMETERS
GALAXIES: STRUCTURE
GRAVITATION
topic DARK MATTER
GALAXIES: DWARF
GALAXIES: FUNDAMENTAL PARAMETERS
GALAXIES: STRUCTURE
GRAVITATION
purl_subject.fl_str_mv https://purl.org/becyt/ford/1.3
https://purl.org/becyt/ford/1
dc.description.none.fl_txt_mv Cold dark matter (CDM) simulations predict a central cusp in the mass distribution of galaxies. This prediction is in stark contrast with observations of dwarf galaxies that show a central plateau or "core"in their density distribution. The proposed solutions to this core-cusp problem can be classified into two types. One invokes feedback mechanisms produced by the baryonic component of the galaxies and the other assumes that the properties of the dark matter particle depart from the CDM hypothesis. Here we propose an alternative yet complementary explanation. We argue that cores are unavoidable in the self-gravitating systems of maximum entropy that result from non-extensive statistical mechanics. Their structure follows from the Tsallis entropy, which is attributed to systems with long-range interactions. Strikingly, the mass density profiles predicted by such thermodynamic equilibrium match the observed cores without any adjustment or tuning. Thus, the principle of maximum Tsallis entropy explains the presence of cores in dwarf galaxies.
Fil: Sánchez Almeida, Jorge. Instituto Astrofisico de Canarias; España. Universidad de La Laguna; España
Fil: Trujillo, Ignacio. Instituto Astrofisico de Canarias; España. Universidad de La Laguna; España
Fil: Plastino, Ángel Ricardo. Universidad Nacional del Noroeste de la Provincia de Buenos Aires. Centro de Bioinvestigaciones (Sede Pergamino); Argentina. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro de Investigaciones y Transferencia del Noroeste de la Provincia de Buenos Aires. Universidad Nacional del Noroeste de la Provincia de Buenos Aires. Centro de Investigaciones y Transferencia del Noroeste de la Provincia de Buenos Aires; Argentina
description Cold dark matter (CDM) simulations predict a central cusp in the mass distribution of galaxies. This prediction is in stark contrast with observations of dwarf galaxies that show a central plateau or "core"in their density distribution. The proposed solutions to this core-cusp problem can be classified into two types. One invokes feedback mechanisms produced by the baryonic component of the galaxies and the other assumes that the properties of the dark matter particle depart from the CDM hypothesis. Here we propose an alternative yet complementary explanation. We argue that cores are unavoidable in the self-gravitating systems of maximum entropy that result from non-extensive statistical mechanics. Their structure follows from the Tsallis entropy, which is attributed to systems with long-range interactions. Strikingly, the mass density profiles predicted by such thermodynamic equilibrium match the observed cores without any adjustment or tuning. Thus, the principle of maximum Tsallis entropy explains the presence of cores in dwarf galaxies.
publishDate 2020
dc.date.none.fl_str_mv 2020-10
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/11336/153608
Sánchez Almeida, Jorge; Trujillo, Ignacio; Plastino, Ángel Ricardo; The principle of maximum entropy explains the cores observed in the mass distribution of dwarf galaxies; EDP Sciences; Astronomy and Astrophysics; 642; 10-2020; 1-3
0004-6361
1432-0746
CONICET Digital
CONICET
url http://hdl.handle.net/11336/153608
identifier_str_mv Sánchez Almeida, Jorge; Trujillo, Ignacio; Plastino, Ángel Ricardo; The principle of maximum entropy explains the cores observed in the mass distribution of dwarf galaxies; EDP Sciences; Astronomy and Astrophysics; 642; 10-2020; 1-3
0004-6361
1432-0746
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/articles/aa/full_html/2020/10/aa39190-20/aa39190-20.html
info:eu-repo/semantics/altIdentifier/doi/10.1051/0004-6361/202039190
info:eu-repo/semantics/altIdentifier/url/https://arxiv.org/abs/2009.08994#:~:text=Strikingly%2C%20the%20mass%20density%20profiles,of%20cores%20in%20dwarf%20galaxies.
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
_version_ 1842268642684698624
score 13.13397

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