Scalar charges and pulsar-timing observables in the presence of nonminimally coupled scalar fields
Abstract
Pulsar-timing has become a celebrated tool for probing modifications to general relativity in the strong-field surroundings of neutron stars. Here we investigate whether scalar-tensor theories that incorporate a nonminimally coupled scalar degree of freedom may pass pulsar-timing tests, by computing the scalar charges entering such observables. In particular we show that for positive values of the nonminimal coupling ξ , pulsar-timing constraints may be evaded even in the presence of spontaneous scalarization.
- Publication:
-
Physical Review D
- Pub Date:
- June 2019
- DOI:
- 10.1103/PhysRevD.99.124003
- arXiv:
- arXiv:1903.11638
- Bibcode:
- 2019PhRvD..99l4003M
- Keywords:
-
- General Relativity and Quantum Cosmology
- E-Print:
- 12 pages, 6 figures