On the possibility of setting a new constraint to scalar-tensor theories
arXiv:1412.6789 · doi:10.1103/PhysRevD.91.064024
Abstract
Scalar-tensor theories (STTs) are a widely studied alternative to General Relativity (GR) in which gravity is endowed with an additional scalar degree of freedom. Although severely constrained by solar system and pulsar timing experiments, there remains a large set of STTs which are consistent with all present day observations. In this paper, we investigate the possibility of probing a yet unconstrained region of the parameter space of STTs based on the fact that stability properties of highly compact neutron stars in these theories may radically differ from those in GR.
8 pages, 4 figures; matches published version
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- Constraints on conformal ultralight dark matter couplings from the European Pulsar Timing Array
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- Scalar charges and pulsar-timing observables in the presence of nonminimally coupled scalar fields
- Compact Objects in Alternative Gravities
- On the phase transition mechanism of spontaneous scalarization
- Subtleties in constraining gravity theories with mass-radius data
- Instabilities of scalar fields around oscillating stars
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- Neutron stars as extreme gravity probes
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- The ghost of vector fields in compact stars