Black holes in self-tuning cubic Horndeski cosmology

Emond, William T.; Leh�bel, Antoine; Saffin, Paul M.

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), Article 084008. 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