| Full text | |
| Author(s): |
Afshordi, Niayesh
;
Fontanini, Michele
;
Guariento, Daniel C.
Total Authors: 3
|
| Document type: | Journal article |
| Source: | Physical Review D; v. 90, n. 8, p. 10-pg., 2014-10-13. |
| Abstract | |
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) | |
| FAPESP's process: | 10/08267-8 - Thermodynamics and field theory models for dark matter and dark energy |
| Grantee: | Daniel Carrasco Guariento |
| Support Opportunities: | Scholarships in Brazil - Post-Doctoral |
| FAPESP's process: | 13/01854-3 - Black holes in an expanding universe and interaction betweend dark matter and dark energy |
| Grantee: | Daniel Carrasco Guariento |
| Support Opportunities: | Scholarships abroad - Research Internship - Post-doctor |