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2006•AIP conference proceedingsRequires access

Stellar Dynamics in Scalar-Tensor Gravity

Kostas D. Kokkotas

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Abstract

We study perturbations of relativistic stars in scalar‐tensor theory of gravity and examine the effects of the scalar field on the corresponding oscillation spectrum. 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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What this paper is about

We study perturbations of relativistic stars in scalar‐tensor theory of gravity and examine the effects of the scalar field on the corresponding oscillation spectrum. 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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Available abstract

We study perturbations of relativistic stars in scalar‐tensor theory of gravity and examine the effects of the scalar field on the corresponding oscillation spectrum. 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.

Key concepts: Physics, Scalar field, Scalar theories of gravitation, Scalar (mathematics), Gravitational wave, Scalar–tensor theory, Oscillation (cell signaling), Gravitation

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