Spontaneous scalarization of black holes and compact stars from a Gauss-Bonnet coupling

Silva, Hector O.; Sakstein, Jeremy; Gualtieri, Leonardo; Sotiriou, Thomas P.; Berti, Emanuele

Abstract

We identify a class of scalar-tensor theories with coupling between the scalar and the Gauss-Bonnet invariant that exhibit spontaneous scalarization for both black holes and compact stars. In particular, these theories formally admit all of the stationary solutions of general relativity, but these are not dynamically preferred if certain conditions are satisfied. Remarkably, black holes exhibit scalarization if their mass lies within one of many narrow bands. We find evidence that scalarization can occur in neutron stars as well.

Citation

Silva, H. O., Sakstein, J., Gualtieri, L., Sotiriou, T. P., & Berti, E. (2018). Spontaneous scalarization of black holes and compact stars from a Gauss-Bonnet coupling. Physical Review Letters, 120(13), Article 131104. https://doi.org/10.1103/PhysRevLett.120.131104

• Journal Article Type: Article
• Acceptance Date: Feb 7, 2018
• Online Publication Date: Mar 30, 2018
• Publication Date: Mar 30, 2018
• Deposit Date: Apr 12, 2018
• Publicly Available Date: Apr 12, 2018
• Journal: Physical Review Letters
• Print ISSN: 0031-9007
• Electronic ISSN: 1079-7114
• Publisher: American Physical Society
• Peer Reviewed: Peer Reviewed
• Volume: 120
• Issue: 13
• Article Number: 131104
• DOI: https://doi.org/10.1103/PhysRevLett.120.131104
• Keywords: General Relativity and Quantum Cosmology; Cosmology and Nongalactic Astrophysics; High Energy Physics - Theory
• Public URL: https://nottingham-repository.worktribe.com/output/922276
• Publisher URL: https://doi.org/10.1103/PhysRevLett.120.131104
• Contract Date: Apr 12, 2018