Black holes in Einstein-Gauss-Bonnet gravity with a string cloud background

We obtain a black hole solution in the Einstein-Gauss-Bonnet theory for the string cloud model in a five-dimensional spacetime. We analyze the event horizons and naked singularities. Later, we compute the Hawking temperature TH, the specific heat C, the entropy S, and the Helmholtz free energy F of...

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Bibliographic Details
Authors: Herscovich, E., Richarte, M.G.
Format: article
Status:Published version
Publication Date:2010
Country:Argentina
Institution:Universidad Nacional de Buenos Aires. Facultad de Ciencias Exactas y Naturales
Repository:Biblioteca Digital (UBA-FCEN)
Language:English
OAI Identifier:paperaa:paper_03702693_v689_n4-5_p192_Herscovich
Online Access:http://hdl.handle.net/20.500.12110/paper_03702693_v689_n4-5_p192_Herscovich
Access Level:Open access
Keyword:Black holes
Gauss-Bonnet
String cloud model
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repository_id_str
spelling Black holes in Einstein-Gauss-Bonnet gravity with a string cloud backgroundHerscovich, E.Richarte, M.G.Black holesGauss-BonnetString cloud modelWe obtain a black hole solution in the Einstein-Gauss-Bonnet theory for the string cloud model in a five-dimensional spacetime. We analyze the event horizons and naked singularities. Later, we compute the Hawking temperature TH, the specific heat C, the entropy S, and the Helmholtz free energy F of the black hole. The entropy was computed using the Wald formulation. In addition, the quantum correction to the Wald's entropy is considered for the string cloud source. We mainly explore the thermodynamical global and local stability of the system with vanishing or non-vanishing cosmological constant. The global thermodynamic phase structure indicates that the Hawking-Page transition is achieved for this model. Further, we observe that there exist stable black holes with small radii and that these regions are enlarged when choosing small values of the string cloud density and of the Gauss-Bonnet parameter. Besides, the rate of evaporation for these black holes are studied, determining whether the evaporation time is finite or not. Then, we concentrate on the dynamical stability of the system, studying the effective potential for s-waves propagating on the string cloud background. © 2010 Elsevier B.V. All rights reserved.Fil:Richarte, M.G. Universidad de Buenos Aires. Facultad de Ciencias Exactas y Naturales; Argentina.2010info:eu-repo/semantics/articleinfo:eu-repo/semantics/publishedVersionhttp://purl.org/coar/resource_type/c_6501info:ar-repo/semantics/articuloapplication/pdfhttp://hdl.handle.net/20.500.12110/paper_03702693_v689_n4-5_p192_HerscovichPhys Lett Sect B Nucl Elem Part High-Energy Phys 2010;689(4-5):192-200reponame:Biblioteca Digital (UBA-FCEN)instname:Universidad Nacional de Buenos Aires. Facultad de Ciencias Exactas y Naturalesinstacron:UBA-FCENenginfo:eu-repo/semantics/openAccesshttp://creativecommons.org/licenses/by/2.5/ar2024-05-10T10:42:31Zpaperaa:paper_03702693_v689_n4-5_p192_HerscovichInstitucionalhttps://digital.bl.fcen.uba.ar/Universidad públicaNo correspondehttps://digital.bl.fcen.uba.ar/cgi-bin/oaiserver.cgiana@bl.fcen.uba.arArgentinaNo correspondeNo correspondeNo correspondeopendoar:18962024-05-10 10:42:32.154Biblioteca Digital (UBA-FCEN) - Universidad Nacional de Buenos Aires. Facultad de Ciencias Exactas y Naturalesfalse
dc.title.none.fl_str_mv Black holes in Einstein-Gauss-Bonnet gravity with a string cloud background
title Black holes in Einstein-Gauss-Bonnet gravity with a string cloud background
spellingShingle Black holes in Einstein-Gauss-Bonnet gravity with a string cloud background
Herscovich, E.
Black holes
Gauss-Bonnet
String cloud model
title_short Black holes in Einstein-Gauss-Bonnet gravity with a string cloud background
title_full Black holes in Einstein-Gauss-Bonnet gravity with a string cloud background
title_fullStr Black holes in Einstein-Gauss-Bonnet gravity with a string cloud background
title_full_unstemmed Black holes in Einstein-Gauss-Bonnet gravity with a string cloud background
title_sort Black holes in Einstein-Gauss-Bonnet gravity with a string cloud background
dc.creator.none.fl_str_mv Herscovich, E.
Richarte, M.G.
author Herscovich, E.
author_facet Herscovich, E.
Richarte, M.G.
author_role author
author2 Richarte, M.G.
author2_role author
dc.subject.none.fl_str_mv Black holes
Gauss-Bonnet
String cloud model
topic Black holes
Gauss-Bonnet
String cloud model
description We obtain a black hole solution in the Einstein-Gauss-Bonnet theory for the string cloud model in a five-dimensional spacetime. We analyze the event horizons and naked singularities. Later, we compute the Hawking temperature TH, the specific heat C, the entropy S, and the Helmholtz free energy F of the black hole. The entropy was computed using the Wald formulation. In addition, the quantum correction to the Wald's entropy is considered for the string cloud source. We mainly explore the thermodynamical global and local stability of the system with vanishing or non-vanishing cosmological constant. The global thermodynamic phase structure indicates that the Hawking-Page transition is achieved for this model. Further, we observe that there exist stable black holes with small radii and that these regions are enlarged when choosing small values of the string cloud density and of the Gauss-Bonnet parameter. Besides, the rate of evaporation for these black holes are studied, determining whether the evaporation time is finite or not. Then, we concentrate on the dynamical stability of the system, studying the effective potential for s-waves propagating on the string cloud background. © 2010 Elsevier B.V. All rights reserved.
publishDate 2010
dc.date.none.fl_str_mv 2010
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/20.500.12110/paper_03702693_v689_n4-5_p192_Herscovich
url http://hdl.handle.net/20.500.12110/paper_03702693_v689_n4-5_p192_Herscovich
dc.language.none.fl_str_mv eng
language eng
dc.rights.none.fl_str_mv info:eu-repo/semantics/openAccess
http://creativecommons.org/licenses/by/2.5/ar
eu_rights_str_mv openAccess
rights_invalid_str_mv http://creativecommons.org/licenses/by/2.5/ar
dc.format.none.fl_str_mv application/pdf
dc.source.none.fl_str_mv Phys Lett Sect B Nucl Elem Part High-Energy Phys 2010;689(4-5):192-200
reponame:Biblioteca Digital (UBA-FCEN)
instname:Universidad Nacional de Buenos Aires. Facultad de Ciencias Exactas y Naturales
instacron:UBA-FCEN
instname_str Universidad Nacional de Buenos Aires. Facultad de Ciencias Exactas y Naturales
instacron_str UBA-FCEN
institution UBA-FCEN
reponame_str Biblioteca Digital (UBA-FCEN)
collection Biblioteca Digital (UBA-FCEN)
repository.name.fl_str_mv Biblioteca Digital (UBA-FCEN) - Universidad Nacional de Buenos Aires. Facultad de Ciencias Exactas y Naturales
repository.mail.fl_str_mv ana@bl.fcen.uba.ar
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