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| DOI | 10.1103/PHYSREVD.92.104050 | ||||
| Año | 2015 | ||||
| Tipo | artículo de investigación |
Citas Totales
Autores Afiliación Chile
Instituciones Chile
% Participación
Internacional
Autores
Afiliación Extranjera
Instituciones
Extranjeras
We study a scalar-tensor version of Lovelock theory with a nontrivial higher-order Galileon term involving the coupling of the Lovelock two tensor with derivatives of the scalar Galileon field. For a static and spherically symmetric spacetime, we extend the Boulware-Deser solution to the presence of a Galileon field. The hairy solution has a regular scalar field on the black hole event horizon and presents certain selftuning properties for the bulk cosmological constant and the Gauss-Bonnet coupling. The combined time and radial dependence of the Galileon field permits its horizon regularity. Furthermore in order to investigate the effects of linear time dependence we find spherically symmetric solutions in four and five spacetime dimensions. They are shown to have singular horizons. Afar from the Schwarzschild radius and for weak higher-dimensional couplings the solutions are perturbatively close to GR representing exteriors of GR-like star solutions for scalar tensor theories.
| Ord. | Autor | Género | Institución - País |
|---|---|---|---|
| 1 | Charmousis, Christos | Hombre |
Univ Paris 11 - Francia
Laboratoire de Physique Theorique d'Orsay - Francia |
| 2 | Tsoukalas, Minas | Hombre |
Centro de Estudios Científicos - Chile
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| Fuente |
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| Chilean Government through the Centers of Excellence Base Financing Program of CONICYT |
| research program, Programme national de cosmologie et Galaxies of the CNRS/INSU, France |
| Agradecimiento |
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| We would like to thank Mokhtar Hassaine for early collaboration on the subject and for useful discussions. We would also like to thank Elias Kiritsis and Vishagan Sivanesan for discussions. We are also grateful to Georgios Pastras for the use of his computer for various calculations. The authors thank the National Technical University of Athens for hospitality during the last stages of this work and M. T. thanks the Laboratoire de Physique Theorique (LPT), Universite Paris-Sud in Orsay. C. C. thanks The Centro de Estudios Cientificos for hospitality in the initial stages of this work. The authors also acknowledge financial support from the research program, Programme national de cosmologie et Galaxies of the CNRS/INSU, France. The Centro de Estudios Cientificos (CECs) is funded by the Chilean Government through the Centers of Excellence Base Financing Program of Conicyt. |