Advanced search
Start date
Betweenand
(Reference retrieved automatically from Web of Science through information on FAPESP grant and its corresponding number as mentioned in the publication by the authors.)

Horndeski theory meets the McVittie solution: A scalar field theory for accretion onto cosmological black holes

Full text
Author(s):
Afshordi, Niayesh [1, 2] ; Fontanini, Michele [3] ; Guariento, Daniel C. [1, 3]
Total Authors: 3
Affiliation:
[1] Perimeter Inst Theoret Phys, Waterloo, ON N2L 2Y5 - Canada
[2] Univ Waterloo, Dept Phys & Astron, Waterloo, ON N2L 3G1 - Canada
[3] Univ Sao Paulo, Inst Fis, BR-05315970 Sao Paulo - Brazil
Total Affiliations: 3
Document type: Journal article
Source: Physical Review D; v. 90, n. 8 OCT 13 2014.
Web of Science Citations: 14
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 type: Scholarships in Brazil - Post-Doctorate
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 type: Scholarships abroad - Research Internship - Post-doctor