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(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

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Afshordi, Niayesh [1, 2] ; Fontanini, Michele [3] ; Guariento, Daniel C. [1, 3]
Total Authors: 3
[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

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