On the nature of hydrostatic equilibrium in galaxy clusters

Autores
Biffi, Verónica; Borgani, Stefano; Murante, Giuseppe; Rasia, Elena; Planelles, Susana; Granato, Gian Luigi; Ragone Figueroa, Cinthia Judith; Beck, Alexander; Gaspari, Massimo; Dolag, Klaus
Año de publicación
2016
Idioma
inglés
Tipo de recurso
artículo
Estado
versión publicada
Descripción
In this paper we investigate the level of hydrostatic equilibrium (HE) in the intra-cluster medium of simu-lated galaxy clusters, extracted from state-of-the-art cosmological hydrodynamical simulations performed withthe Smoothed-Particle-Hydrodynamic code GADGET-3. These simulations include several physical processes,among which stellar and AGN feedback, and have been performed with an improved version of the code thatallows for a better description of hydrodynamical instabilities and gas mixing processes. Evaluating the radialbalance between the gravitational and hydrodynamical forces, via the gas accelerations generated, we effectivelyexamine the level of HE in every object of the sample, its dependence on the radial distance from the center and onthe classification of the cluster in terms of either cool-coreness or dynamical state. We find an average deviation of10?20% out to the virial radius, with no evident distinction between cool-core and non-cool-core clusters. Instead,we observe a clear separation between regular and disturbed systems, with a more significant deviation from HEfor the disturbed objects. The investigation of the bias between the hydrostatic estimate and the total gravitatingmass indicates that, on average, this traces very well the deviation from HE, even though individual cases showa more complex picture. Typically, in the radial ranges where mass bias and deviation from HE are substantiallydifferent, the gas is characterized by a significant amount of random motions ( 30 per cent), relative to thermalones. As a general result, the HE-deviation and mass bias, at given interesting distance from the cluster center, arenot very sensitive to the temperature inhomogeneities in the gas.
Fil: Biffi, Verónica. Università degli Studi di Trieste; Italia. Osservatorio Astronomico di Trieste; Italia
Fil: Borgani, Stefano. Università degli Studi di Trieste; Italia. Osservatorio Astronomico di Trieste; Italia
Fil: Murante, Giuseppe. Osservatorio Astronomico di Trieste; Italia
Fil: Rasia, Elena. Osservatorio Astronomico di Trieste; Italia. University of Michigan; Estados Unidos
Fil: Planelles, Susana. Osservatorio Astronomico di Trieste; Italia. Universidad de Valencia; España
Fil: Granato, Gian Luigi. Istituto Nazionale di Astrofisica; Italia. Osservatorio Astronomico di Trieste; Italia
Fil: Ragone Figueroa, Cinthia Judith. Universidad Nacional de Córdoba. Observatorio Astronómico de Córdoba; Argentina. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Córdoba. Instituto de Astronomía Teórica y Experimental. Universidad Nacional de Córdoba. Observatorio Astronómico de Córdoba. Instituto de Astronomía Teórica y Experimental; Argentina
Fil: Beck, Alexander. University Observatory Munich; Alemania. Universitat Genzentrum Der Ludwing-Maximilians; Alemania
Fil: Gaspari, Massimo. University of Princeton; Estados Unidos
Fil: Dolag, Klaus. University Observatory Munich; Alemania. Universitat Genzentrum Der Ludwing-Maximilians; Alemania
Materia
GALAXIES: CLUSTERS: GENERAL
GALAXIES: CLUSTERS: INTRACLUSTER MEDIUM
METHODS: NUMERICAL
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:11336/182785
Acceder
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oai_identifier_str oai:ri.conicet.gov.ar:11336/182785
network_acronym_str CONICETDig
repository_id_str 3498
network_name_str CONICET Digital (CONICET)
spelling On the nature of hydrostatic equilibrium in galaxy clustersBiffi, VerónicaBorgani, StefanoMurante, GiuseppeRasia, ElenaPlanelles, SusanaGranato, Gian LuigiRagone Figueroa, Cinthia JudithBeck, AlexanderGaspari, MassimoDolag, KlausGALAXIES: CLUSTERS: GENERALGALAXIES: CLUSTERS: INTRACLUSTER MEDIUMMETHODS: NUMERICALhttps://purl.org/becyt/ford/1.3https://purl.org/becyt/ford/1In this paper we investigate the level of hydrostatic equilibrium (HE) in the intra-cluster medium of simu-lated galaxy clusters, extracted from state-of-the-art cosmological hydrodynamical simulations performed withthe Smoothed-Particle-Hydrodynamic code GADGET-3. These simulations include several physical processes,among which stellar and AGN feedback, and have been performed with an improved version of the code thatallows for a better description of hydrodynamical instabilities and gas mixing processes. Evaluating the radialbalance between the gravitational and hydrodynamical forces, via the gas accelerations generated, we effectivelyexamine the level of HE in every object of the sample, its dependence on the radial distance from the center and onthe classification of the cluster in terms of either cool-coreness or dynamical state. We find an average deviation of10?20% out to the virial radius, with no evident distinction between cool-core and non-cool-core clusters. Instead,we observe a clear separation between regular and disturbed systems, with a more significant deviation from HEfor the disturbed objects. The investigation of the bias between the hydrostatic estimate and the total gravitatingmass indicates that, on average, this traces very well the deviation from HE, even though individual cases showa more complex picture. Typically, in the radial ranges where mass bias and deviation from HE are substantiallydifferent, the gas is characterized by a significant amount of random motions ( 30 per cent), relative to thermalones. As a general result, the HE-deviation and mass bias, at given interesting distance from the cluster center, arenot very sensitive to the temperature inhomogeneities in the gas.Fil: Biffi, Verónica. Università degli Studi di Trieste; Italia. Osservatorio Astronomico di Trieste; ItaliaFil: Borgani, Stefano. Università degli Studi di Trieste; Italia. Osservatorio Astronomico di Trieste; ItaliaFil: Murante, Giuseppe. Osservatorio Astronomico di Trieste; ItaliaFil: Rasia, Elena. Osservatorio Astronomico di Trieste; Italia. University of Michigan; Estados UnidosFil: Planelles, Susana. Osservatorio Astronomico di Trieste; Italia. Universidad de Valencia; EspañaFil: Granato, Gian Luigi. Istituto Nazionale di Astrofisica; Italia. Osservatorio Astronomico di Trieste; ItaliaFil: Ragone Figueroa, Cinthia Judith. Universidad Nacional de Córdoba. Observatorio Astronómico de Córdoba; Argentina. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Córdoba. Instituto de Astronomía Teórica y Experimental. Universidad Nacional de Córdoba. Observatorio Astronómico de Córdoba. Instituto de Astronomía Teórica y Experimental; ArgentinaFil: Beck, Alexander. University Observatory Munich; Alemania. Universitat Genzentrum Der Ludwing-Maximilians; AlemaniaFil: Gaspari, Massimo. University of Princeton; Estados UnidosFil: Dolag, Klaus. University Observatory Munich; Alemania. Universitat Genzentrum Der Ludwing-Maximilians; AlemaniaIOP Publishing2016-08info:eu-repo/semantics/articleinfo:eu-repo/semantics/publishedVersionhttp://purl.org/coar/resource_type/c_6501info:ar-repo/semantics/articuloapplication/pdfapplication/pdfhttp://hdl.handle.net/11336/182785Biffi, Verónica; Borgani, Stefano; Murante, Giuseppe; Rasia, Elena; Planelles, Susana; et al.; On the nature of hydrostatic equilibrium in galaxy clusters; IOP Publishing; Astrophysical Journal; 827; 2; 8-2016; 1-140004-637X1538-4357CONICET DigitalCONICETenginfo:eu-repo/semantics/altIdentifier/url/http://arxiv.org/abs/1606.02293info:eu-repo/semantics/altIdentifier/doi/10.3847/0004-637X/827/2/112info:eu-repo/semantics/altIdentifier/url/https://iopscience.iop.org/article/10.3847/0004-637X/827/2/112info:eu-repo/semantics/openAccesshttps://creativecommons.org/licenses/by-nc-sa/2.5/ar/reponame:CONICET Digital (CONICET)instname:Consejo Nacional de Investigaciones Científicas y Técnicas2025-10-15T15:44:01Zoai:ri.conicet.gov.ar:11336/182785instacron: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:34982025-10-15 15:44:01.389CONICET Digital (CONICET) - Consejo Nacional de Investigaciones Científicas y Técnicasfalse
dc.title.none.fl_str_mv On the nature of hydrostatic equilibrium in galaxy clusters
title On the nature of hydrostatic equilibrium in galaxy clusters
spellingShingle On the nature of hydrostatic equilibrium in galaxy clusters
Biffi, Verónica
GALAXIES: CLUSTERS: GENERAL
GALAXIES: CLUSTERS: INTRACLUSTER MEDIUM
METHODS: NUMERICAL
title_short On the nature of hydrostatic equilibrium in galaxy clusters
title_full On the nature of hydrostatic equilibrium in galaxy clusters
title_fullStr On the nature of hydrostatic equilibrium in galaxy clusters
title_full_unstemmed On the nature of hydrostatic equilibrium in galaxy clusters
title_sort On the nature of hydrostatic equilibrium in galaxy clusters
dc.creator.none.fl_str_mv Biffi, Verónica
Borgani, Stefano
Murante, Giuseppe
Rasia, Elena
Planelles, Susana
Granato, Gian Luigi
Ragone Figueroa, Cinthia Judith
Beck, Alexander
Gaspari, Massimo
Dolag, Klaus
author Biffi, Verónica
author_facet Biffi, Verónica
Borgani, Stefano
Murante, Giuseppe
Rasia, Elena
Planelles, Susana
Granato, Gian Luigi
Ragone Figueroa, Cinthia Judith
Beck, Alexander
Gaspari, Massimo
Dolag, Klaus
author_role author
author2 Borgani, Stefano
Murante, Giuseppe
Rasia, Elena
Planelles, Susana
Granato, Gian Luigi
Ragone Figueroa, Cinthia Judith
Beck, Alexander
Gaspari, Massimo
Dolag, Klaus
author2_role author
author
author
author
author
author
author
author
author
dc.subject.none.fl_str_mv GALAXIES: CLUSTERS: GENERAL
GALAXIES: CLUSTERS: INTRACLUSTER MEDIUM
METHODS: NUMERICAL
topic GALAXIES: CLUSTERS: GENERAL
GALAXIES: CLUSTERS: INTRACLUSTER MEDIUM
METHODS: NUMERICAL
purl_subject.fl_str_mv https://purl.org/becyt/ford/1.3
https://purl.org/becyt/ford/1
dc.description.none.fl_txt_mv In this paper we investigate the level of hydrostatic equilibrium (HE) in the intra-cluster medium of simu-lated galaxy clusters, extracted from state-of-the-art cosmological hydrodynamical simulations performed withthe Smoothed-Particle-Hydrodynamic code GADGET-3. These simulations include several physical processes,among which stellar and AGN feedback, and have been performed with an improved version of the code thatallows for a better description of hydrodynamical instabilities and gas mixing processes. Evaluating the radialbalance between the gravitational and hydrodynamical forces, via the gas accelerations generated, we effectivelyexamine the level of HE in every object of the sample, its dependence on the radial distance from the center and onthe classification of the cluster in terms of either cool-coreness or dynamical state. We find an average deviation of10?20% out to the virial radius, with no evident distinction between cool-core and non-cool-core clusters. Instead,we observe a clear separation between regular and disturbed systems, with a more significant deviation from HEfor the disturbed objects. The investigation of the bias between the hydrostatic estimate and the total gravitatingmass indicates that, on average, this traces very well the deviation from HE, even though individual cases showa more complex picture. Typically, in the radial ranges where mass bias and deviation from HE are substantiallydifferent, the gas is characterized by a significant amount of random motions ( 30 per cent), relative to thermalones. As a general result, the HE-deviation and mass bias, at given interesting distance from the cluster center, arenot very sensitive to the temperature inhomogeneities in the gas.
Fil: Biffi, Verónica. Università degli Studi di Trieste; Italia. Osservatorio Astronomico di Trieste; Italia
Fil: Borgani, Stefano. Università degli Studi di Trieste; Italia. Osservatorio Astronomico di Trieste; Italia
Fil: Murante, Giuseppe. Osservatorio Astronomico di Trieste; Italia
Fil: Rasia, Elena. Osservatorio Astronomico di Trieste; Italia. University of Michigan; Estados Unidos
Fil: Planelles, Susana. Osservatorio Astronomico di Trieste; Italia. Universidad de Valencia; España
Fil: Granato, Gian Luigi. Istituto Nazionale di Astrofisica; Italia. Osservatorio Astronomico di Trieste; Italia
Fil: Ragone Figueroa, Cinthia Judith. Universidad Nacional de Córdoba. Observatorio Astronómico de Córdoba; Argentina. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Córdoba. Instituto de Astronomía Teórica y Experimental. Universidad Nacional de Córdoba. Observatorio Astronómico de Córdoba. Instituto de Astronomía Teórica y Experimental; Argentina
Fil: Beck, Alexander. University Observatory Munich; Alemania. Universitat Genzentrum Der Ludwing-Maximilians; Alemania
Fil: Gaspari, Massimo. University of Princeton; Estados Unidos
Fil: Dolag, Klaus. University Observatory Munich; Alemania. Universitat Genzentrum Der Ludwing-Maximilians; Alemania
description In this paper we investigate the level of hydrostatic equilibrium (HE) in the intra-cluster medium of simu-lated galaxy clusters, extracted from state-of-the-art cosmological hydrodynamical simulations performed withthe Smoothed-Particle-Hydrodynamic code GADGET-3. These simulations include several physical processes,among which stellar and AGN feedback, and have been performed with an improved version of the code thatallows for a better description of hydrodynamical instabilities and gas mixing processes. Evaluating the radialbalance between the gravitational and hydrodynamical forces, via the gas accelerations generated, we effectivelyexamine the level of HE in every object of the sample, its dependence on the radial distance from the center and onthe classification of the cluster in terms of either cool-coreness or dynamical state. We find an average deviation of10?20% out to the virial radius, with no evident distinction between cool-core and non-cool-core clusters. Instead,we observe a clear separation between regular and disturbed systems, with a more significant deviation from HEfor the disturbed objects. The investigation of the bias between the hydrostatic estimate and the total gravitatingmass indicates that, on average, this traces very well the deviation from HE, even though individual cases showa more complex picture. Typically, in the radial ranges where mass bias and deviation from HE are substantiallydifferent, the gas is characterized by a significant amount of random motions ( 30 per cent), relative to thermalones. As a general result, the HE-deviation and mass bias, at given interesting distance from the cluster center, arenot very sensitive to the temperature inhomogeneities in the gas.
publishDate 2016
dc.date.none.fl_str_mv 2016-08
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/11336/182785
Biffi, Verónica; Borgani, Stefano; Murante, Giuseppe; Rasia, Elena; Planelles, Susana; et al.; On the nature of hydrostatic equilibrium in galaxy clusters; IOP Publishing; Astrophysical Journal; 827; 2; 8-2016; 1-14
0004-637X
1538-4357
CONICET Digital
CONICET
url http://hdl.handle.net/11336/182785
identifier_str_mv Biffi, Verónica; Borgani, Stefano; Murante, Giuseppe; Rasia, Elena; Planelles, Susana; et al.; On the nature of hydrostatic equilibrium in galaxy clusters; IOP Publishing; Astrophysical Journal; 827; 2; 8-2016; 1-14
0004-637X
1538-4357
CONICET Digital
CONICET
dc.language.none.fl_str_mv eng
language eng
dc.relation.none.fl_str_mv info:eu-repo/semantics/altIdentifier/url/http://arxiv.org/abs/1606.02293
info:eu-repo/semantics/altIdentifier/doi/10.3847/0004-637X/827/2/112
info:eu-repo/semantics/altIdentifier/url/https://iopscience.iop.org/article/10.3847/0004-637X/827/2/112
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 IOP Publishing
publisher.none.fl_str_mv IOP Publishing
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 13.22299

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