| Texto completo | |
| Autor(es): |
Afshordi, Niayesh
;
Fontanini, Michele
;
Guariento, Daniel C.
Número total de Autores: 3
|
| Tipo de documento: | Artigo Científico |
| Fonte: | Physical Review D; v. 90, n. 8, p. 10-pg., 2014-10-13. |
| Resumo | |
We show that the generalized McVittie spacetime, which represents a black hole with time-dependent mass in an expanding universe, is an exact solution of a subclass of the Horndeski family of actions. The heat-flow term responsible for the energy transfer between the black hole and the cosmological background is generated by the higher-order kinetic gravity braiding term, which generalizes the cuscuton action that yields McVittie with constant mass as a solution. Finally, we show that this generalization can be understood in terms of a duality realized by a disformal transformation, connecting the cuscuton field theory to an extension of the Horndeski action which does not propagate any scalar degrees of freedom. Our finding opens a novel window into studies of nontrivial interactions between dark energy/modified gravity theories and astrophysical black holes. (AU) | |
| Processo FAPESP: | 10/08267-8 - Termodinâmica e modelos de teoria de campos em matéria e energia escuras |
| Beneficiário: | Daniel Carrasco Guariento |
| Modalidade de apoio: | Bolsas no Brasil - Pós-Doutorado |
| Processo FAPESP: | 13/01854-3 - Buracos negros no universo em expansão e a interação entre matéria e energia escuras |
| Beneficiário: | Daniel Carrasco Guariento |
| Modalidade de apoio: | Bolsas no Exterior - Estágio de Pesquisa - Pós-Doutorado |