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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Detalles Bibliográficos
Autores principales:	Herscovich, E., Richarte, M.G.
Formato:	JOUR
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
Aporte de:	Biblioteca Digital - Facultad de Ciencias Exactas y Naturales (UBA) de Universidad de Buenos Aires

id	todo:paper_03702693_v689_n4-5_p192_Herscovich
record_format	dspace
spelling	todo:paper_03702693_v689_n4-5_p192_Herscovich2023-10-03T15:29:04Z Black holes in Einstein-Gauss-Bonnet gravity with a string cloud background Herscovich, E. Richarte, M.G. Black holes Gauss-Bonnet String cloud model 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. JOUR info:eu-repo/semantics/openAccess http://creativecommons.org/licenses/by/2.5/ar http://hdl.handle.net/20.500.12110/paper_03702693_v689_n4-5_p192_Herscovich
institution	Universidad de Buenos Aires
institution_str	I-28
repository_str	R-134
collection	Biblioteca Digital - Facultad de Ciencias Exactas y Naturales (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	JOUR
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
url	http://hdl.handle.net/20.500.12110/paper_03702693_v689_n4-5_p192_Herscovich
work_keys_str_mv	AT herscoviche blackholesineinsteingaussbonnetgravitywithastringcloudbackground AT richartemg blackholesineinsteingaussbonnetgravitywithastringcloudbackground
_version_	1807315275174903808

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

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