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Black holes in self-tuning cubic Horndeski cosmology

Emond, William T.; Lehébel, Antoine; Saffin, Paul M.

Authors

William T. Emond

Antoine Lehébel



Abstract

Observations of neutron star mergers in the late Universe have given significant restrictions to the class of viable scalar-tensor theories. In this paper we construct black holes within the “self-tuning” class of this restricted set, whereby the bare cosmological constant is absorbed by the dynamics of the scalar, giving a lower effective cosmological constant. We use analytic expansions at the singularity, black hole and cosmological horizon, and asymptotic region, coupled with numerical solutions, to find well-behaved black holes that asymptote to the self-tuned de Sitter geometry. The geometry differs from standard general relativity black holes near the horizon, and the scalar field velocity provides a hair for the black holes.

Citation

Emond, W. T., Lehébel, A., & Saffin, P. M. (2020). Black holes in self-tuning cubic Horndeski cosmology. Physical Review D, 101(8), https://doi.org/10.1103/physrevd.101.084008

Journal Article Type Article
Acceptance Date Mar 12, 2020
Online Publication Date Apr 3, 2020
Publication Date Apr 3, 2020
Deposit Date Apr 8, 2020
Publicly Available Date May 29, 2020
Journal Physical Review D
Print ISSN 2470-0010
Electronic ISSN 2470-0029
Publisher American Physical Society
Peer Reviewed Peer Reviewed
Volume 101
Issue 8
Article Number 084008
DOI https://doi.org/10.1103/physrevd.101.084008
Keywords Physics and Astronomy (miscellaneous)
Public URL https://nottingham-repository.worktribe.com/output/4271841
Publisher URL https://journals.aps.org/prd/abstract/10.1103/PhysRevD.101.084008

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