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Journal Articles Physical Review D Year : 2016

Revisiting metric perturbations in tensor-vector-scalar theory

Abstract

I revisit cosmological perturbations in Bekenstein’s tensor-vector-scalar theory (TeVeS). Considering only scalar modes in the conformal Newtonian gauge, the extra degrees of freedom are expressed in a way suitable for studying modifications at the level of the metric potentials. Assuming a universe in the matter-dominated phase, I discuss the mechanism responsible for boosting structure growth and confirm the vector field as its key ingredient. Using a semianalytic approach, I further characterize the evolution of density perturbations and the potentials on sub- and superhorizon scales.

Dates and versions

hal-01331647 , version 1 (14-06-2016)

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Cite

Martin Feix. Revisiting metric perturbations in tensor-vector-scalar theory. Physical Review D, 2016, 93 (10), pp.104039. ⟨10.1103/PhysRevD.93.104039⟩. ⟨hal-01331647⟩
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