Spontaneous scalarization in generalized scalar-tensor theory

Andreou, Nikolas; Franchini, Nicola; Ventagli, Giulia; Sotiriou, Thomas P.

Abstract

Spontaneous scalarization is a mechanism that endows relativistic stars and black holes with a nontrivial configuration only when their spacetime curvature exceeds some threshold. The standard way to trigger spontaneous scalarization is via a tachyonic instability at the linear level, which is eventually quenched due to the effect of nonlinear terms. In this paper, we identify all of the terms in the Horndeski action that contribute to the (effective) mass term in the linearized equations and, hence, can cause or contribute to the tachyonic instability that triggers scalarization.

Citation

Andreou, N., Franchini, N., Ventagli, G., & Sotiriou, T. P. (2019). Spontaneous scalarization in generalized scalar-tensor theory. Physical Review D, 99(12), https://doi.org/10.1103/physrevd.99.124022

• Journal Article Type: Article
• Acceptance Date: May 17, 2019
• Online Publication Date: Jun 13, 2019
• Publication Date: Jun 15, 2019
• Deposit Date: Jun 17, 2019
• Publicly Available Date: Jun 24, 2019
• Journal: Physical Review D
• Print ISSN: 2470-0010
• Electronic ISSN: 2470-0029
• Publisher: American Physical Society
• Peer Reviewed: Peer Reviewed
• Volume: 99
• Issue: 12
• DOI: https://doi.org/10.1103/physrevd.99.124022
• Keywords: Physics and Astronomy (miscellaneous)
• Public URL: https://nottingham-repository.worktribe.com/output/2199547
• Publisher URL: https://journals.aps.org/prd/abstract/10.1103/PhysRevD.99.124022
• Additional Information: Spontaneous scalarization in generalized scalar-tensor theory, Nikolas Andreou, Nicola Franchini, Giulia Ventagli, and Thomas P. Sotiriou, Phys. Rev. D 99, 124022.