Zobrazeno 1 - 10
of 67
pro vyhledávání: '"Dumitru Astefanesei"'
Autor:
Andres Anabalon, Dumitru Astefanesei, Adolfo Cisterna, Fernando Izaurieta, Julio Oliva, Constanza Quijada, Cristian Quinzacara
Publikováno v:
Physics Letters B, Vol 857, Iss , Pp 139000- (2024)
We present new, exact, rotating and accelerating solutions within the framework of five-dimensional Einstein-Gauss-Bonnet theory at the Chern-Simons point. The rotating solutions describe black holes characterized by a single rotation parameter, a ma
Externí odkaz:
https://doaj.org/article/cb07676d0e0f42ad8af4ebcc5c12b4cb
Einstein-scalar field solutions in AdS spacetime: clouds, boundary conditions, and scalar multipoles
Publikováno v:
Journal of High Energy Physics, Vol 2023, Iss 3, Pp 1-37 (2023)
Abstract We consider an Einstein-scalar field model which is a consistent truncation of N $$ \mathcal{N} $$ = 8 D = 4 gauged supergravity, the scalar field possessing a potential which is unbounded from below and a tachyonic mass above the Breitenloh
Externí odkaz:
https://doaj.org/article/313c1344188d4548a1640bd685884b80
Publikováno v:
Journal of High Energy Physics, Vol 2021, Iss 11, Pp 1-14 (2021)
Abstract In this paper we prove that the four-dimensional hyperbolic supersymmetric black holes can be unstable in the canonical ensemble. To this end, we work with an infinite class of N $$ \mathcal{N} $$ = 2 supergravity theories interpolating betw
Externí odkaz:
https://doaj.org/article/33e543651d504aa2b7f7a3c07d306681
Publikováno v:
Journal of High Energy Physics, Vol 2021, Iss 4, Pp 1-37 (2021)
Abstract In this article we study a family of four-dimensional, N $$ \mathcal{N} $$ = 2 supergravity theories that interpolates between all the single dilaton truncations of the SO(8) gauged N $$ \mathcal{N} $$ = 8 supergravity. In this infinitely ma
Externí odkaz:
https://doaj.org/article/afc0121b530c4c7db7f9993464e49fb7
Publikováno v:
Journal of High Energy Physics, Vol 2020, Iss 9, Pp 1-20 (2020)
Abstract In the simplest scalar-tensor theories, wherein the scalar field is non-minimally coupled to the Ricci scalar, spontaneous scalarization of electrovacuum black holes (BHs) does not occur. This ceases to be true in higher dimensional spacetim
Externí odkaz:
https://doaj.org/article/be8061debbc945dfa157859b5b563c16
Autor:
Dumitru Astefanesei, Jose Luis Blázquez-Salcedo, Carlos Herdeiro, Eugen Radu, Nicolas Sanchis-Gual
Publikováno v:
Journal of High Energy Physics, Vol 2020, Iss 7, Pp 1-29 (2020)
Abstract We consider Einstein-Maxwell-dilaton gravity with the non-minimal exponential coupling between the dilaton and the Maxwell field emerging from low energy heterotic string theory. The dilaton is endowed with a potential that originates from a
Externí odkaz:
https://doaj.org/article/f2a1c8392a0447e7a760c6a3d7895354
Publikováno v:
Journal of High Energy Physics, Vol 2020, Iss 7, Pp 1-22 (2020)
Abstract We investigate the phase diagram of a general class of 4-dimensional exact regular hairy planar black holes. For some particular values of the parameters in the moduli potential, these solutions can be embedded in ω-deformed N $$ \mathcal{N
Externí odkaz:
https://doaj.org/article/8988e4a982cb4e669881f6ed66dd9598
Publikováno v:
Journal of High Energy Physics, Vol 2019, Iss 11, Pp 1-33 (2019)
Abstract We study the thermodynamics of an exact hairy black hole solution in Anti- deSitter (AdS) spacetime. We use the counterterm method supplemented with boundary terms for the scalar field to obtain the thermodynamic quantities and stress tensor
Externí odkaz:
https://doaj.org/article/9a4524b0413e41359ed19b319ccb9989
Publikováno v:
Journal of High Energy Physics, Vol 2019, Iss 3, Pp 1-43 (2019)
Abstract We present a detailed analysis of the thermodynamics of exact asymptotically flat hairy black holes in Einstein-Maxwell-dilaton theory. We compute the regularized action, quasilocal stress tensor, and conserved charges by using a ‘countert
Externí odkaz:
https://doaj.org/article/ea1839f23e594375ae7dd227fb2795d8
Publikováno v:
Physics Letters B, Vol 782, Iss , Pp 47-54 (2018)
We present a variational formulation of Einstein–Maxwell-dilaton theory in flat spacetime, when the asymptotic value of the scalar field is not fixed. We obtain the boundary terms that make the variational principle well posed and then compute the
Externí odkaz:
https://doaj.org/article/17c985c8ab07479fbb78453c7f2f7968