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

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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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Autores principales: Herscovich, E., Richarte, M.G.
Formato: Artículo publishedVersion
Publicado: 2010
Materias:
Black holes
Gauss-Bonnet
String cloud model
Acceso en línea:http://hdl.handle.net/20.500.12110/paper_03702693_v689_n4-5_p192_Herscovich
http://repositoriouba.sisbi.uba.ar/gsdl/cgi-bin/library.cgi?a=d&c=artiaex&d=paper_03702693_v689_n4-5_p192_Herscovich_oai
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Repositorio Digital de la Universidad de Buenos Aires (UBA) de Universidad de Buenos Aires
id I28-R145-paper_03702693_v689_n4-5_p192_Herscovich_oai
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spelling I28-R145-paper_03702693_v689_n4-5_p192_Herscovich_oai2020-10-19 Herscovich, E. Richarte, M.G. 2010 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. Fil:Richarte, M.G. Universidad de Buenos Aires. Facultad de Ciencias Exactas y Naturales; Argentina. application/pdf http://hdl.handle.net/20.500.12110/paper_03702693_v689_n4-5_p192_Herscovich info:eu-repo/semantics/openAccess http://creativecommons.org/licenses/by/2.5/ar Phys Lett Sect B Nucl Elem Part High-Energy Phys 2010;689(4-5):192-200 Black holes Gauss-Bonnet String cloud model Black holes in Einstein-Gauss-Bonnet gravity with a string cloud background info:eu-repo/semantics/article info:ar-repo/semantics/artículo info:eu-repo/semantics/publishedVersion http://repositoriouba.sisbi.uba.ar/gsdl/cgi-bin/library.cgi?a=d&c=artiaex&d=paper_03702693_v689_n4-5_p192_Herscovich_oai
institution Universidad de Buenos Aires
institution_str I-28
repository_str R-145
collection Repositorio Digital de la Universidad de Buenos Aires (UBA)
topic Black holes
Gauss-Bonnet
String cloud model
spellingShingle Black holes
Gauss-Bonnet
String cloud model
Herscovich, E.
Richarte, M.G.
Black holes in Einstein-Gauss-Bonnet gravity with a string cloud background
topic_facet 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.
format Artículo
Artículo
publishedVersion
author Herscovich, E.
Richarte, M.G.
author_facet Herscovich, E.
Richarte, M.G.
author_sort Herscovich, E.
title Black holes in Einstein-Gauss-Bonnet gravity with a string cloud background
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
publishDate 2010
url http://hdl.handle.net/20.500.12110/paper_03702693_v689_n4-5_p192_Herscovich
http://repositoriouba.sisbi.uba.ar/gsdl/cgi-bin/library.cgi?a=d&c=artiaex&d=paper_03702693_v689_n4-5_p192_Herscovich_oai
work_keys_str_mv AT herscoviche blackholesineinsteingaussbonnetgravitywithastringcloudbackground
AT richartemg blackholesineinsteingaussbonnetgravitywithastringcloudbackground
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