Onset of spontaneous scalarization in generalized scalar-tensor theories

Ventagli, Giulia; Leh�bel, Antoine; Sotiriou, Thomas P.

Abstract

In gravity theories that exhibit spontaneous scalarization, astrophysical objects are identical to their general relativistic counterpart until they reach a certain threshold in compactness or curvature. Beyond this threshold, they acquire a nontrivial scalar configuration, which also affects their structure. The onset of scalarization is controlled only by terms that contribute to linear perturbation around solutions of general relativity. The complete set of these terms has been identified for generalized scalar-tensor theories. Stepping on this result, we study the onset on scalarization in generalized scalar-tensor theories and determine the relevant thresholds in terms of the contributing coupling constants and the properties of the compact object.

Citation

Ventagli, G., Lehébel, A., & Sotiriou, T. P. (2020). Onset of spontaneous scalarization in generalized scalar-tensor theories. Physical Review D, 102(2), Article 024050. https://doi.org/10.1103/PhysRevD.102.024050

• Journal Article Type: Article
• Acceptance Date: Jun 25, 2020
• Online Publication Date: Jul 16, 2020
• Publication Date: Jul 16, 2020
• Deposit Date: Jul 17, 2020
• Publicly Available Date: Jul 22, 2020
• Journal: Physical Review D
• Print ISSN: 2470-0010
• Electronic ISSN: 2470-0029
• Publisher: American Physical Society
• Peer Reviewed: Peer Reviewed
• Volume: 102
• Issue: 2
• Article Number: 024050
• DOI: https://doi.org/10.1103/PhysRevD.102.024050
• Public URL: https://nottingham-repository.worktribe.com/output/4771414
• Publisher URL: https://journals.aps.org/prd/abstract/10.1103/PhysRevD.102.024050