The description of gravitational waves in geometric scalar gravity

Abstract

It is investigated the gravitational waves phenomena in the geometric scalar theory of gravity (GSG), a class of theories such that gravity is described by a single scalar field. The associated physical metric describing the spacetime is constructed from a disformal transformation of Minkowski geometry. In this theory, a weak field approximation gives rise to a description similar to that one obtained in general relativity, with the gravitational waves propagating at the same speed as the light, although they have a characteristic longitudinal polarization mode, besides others modes that are observer dependent. We also analyze the energy carried by the gravitational waves as well as how their emission affects the orbital period of a binary system. Observational data coming from Hulse and Taylor binary pulsar is then used to constraint the theory parameter.

arXiv commentRevised version accepted for publication in EPJC; confrontation with pulsar observational data added; abstract slightly changed. arXiv admin note: substantial text overlap with arXiv:1607.01037

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Cited by in corpus (2)

• Testing gravity with gauge-invariant polarization states of gravitational waves: Theory and pulsar timing sensitivity
• On variations of $G$ in the geometric scalar theory of gravity