Stellar Oscillations in Scalar-Tensor Theory of Gravity

Details Stellar Oscillations in Scalar-Tensor Theory of Gravity Stellar Oscillations in Scalar-Tensor Theory of Gravity

2005-06-10

arxiv.org/abs/gr-qc/0506060v2

Phys.Rev. D71 (2005) 124038

Astronomy and Astrophysics

Astrophysics

General Relativity and Quantum Cosmology

16 pages, 4 figures

Scientific paper

10.1103/PhysRevD.71.124038

We derive the perturbation equations for relativistic stars in scalar-tensor theories of gravity and study the corresponding oscillation spectrum. We show that the frequency of the emitted gravitational waves is shifted proportionally to the scalar field strength. Scalar waves which might be produced from such oscillations can be a unique probe for the theory, but their detectability is questionable if the radiated energy is small. However we show that there is no need for a direct observation of scalar waves: the shift in the gravitational wave spectrum could unambiguously signal the presence of a scalar field.

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