Cosmic expansion and growth histories in Galileon scalar-tensor models of dark energy

Abstract

We study models of late-time cosmic acceleration in terms of scalar-tensor theories generalized to include a certain class of non-linear derivative interaction of the scalar field. The non-linear effect suppress the scalar-mediated force at short distances to pass solar-system tests of gravity. It is found that the expansion history until today is almost indistinguishable from that of the $\Lambda$CDM model or some (phantom) dark energy models, but the fate of the universe depends clearly on the model parameter. The growth index of matter density perturbations is computed to show that its past asymptotic value is given by 9/16, while the value today is as small as 0.4.

8 pages, 5 figures; v2: Minor changes, added Fig. 5, matches the published version

References in corpus (24)

• Dynamics of dark energy
• Models of f(R) Cosmic Acceleration that Evade Solar-System Tests
• Disappearing cosmological constant in f(R) gravity
• Covariant Galileon
• Causality, Analyticity and an IR Obstruction to UV Completion
• Generalized Galileons: All scalar models whose curved background extensions maintain second-order field equations and stress tensors
• Modified f(R) gravity unifying R^m inflation with \LambdaCDM epoch
• Galileon Cosmology
• Matter density perturbations and effective gravitational constant in modified gravity models of dark energy
• Self-Accelerating Universe in Galileon Cosmology
• On the growth of linear perturbations
• Constraints on scalar-tensor models of dark energy from observational and local gravity tests
• The dispersion of growth of matter perturbations in f(R) gravity
• Density perturbations in f(R) gravity theories in metric and Palatini formalisms
• No-go theorem for k-essence dark energy
• Gauge-invariant analysis of perturbations in Chaplygin gas unified models of dark matter and dark energy
• Evolution of linear cosmological perturbations and its observational implications in Galileon-type modified gravity
• Higher order gravity theories and their black hole solutions
• Causality and the speed of sound
• Crossing the phantom divide without phantom matter
• Cosmological dynamics of Scalar--Tensor Gravity
• Characterizing the linear growth rate of cosmological density perturbations in an f(R) model
• Growth index with the exact analytic solution of sub-horizon scale linear perturbation for dark energy models with constant equation of state
• Slow-roll Extended Quintessence

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• Disformal transformations on the CMB
• A study on Cubic Galileon Gravity Using N-body Simulations
• Non-minimally coupled quintessence DE model with a cubic galileon term --A Dynamical System Analysis
• Primordial Black Holes Dark Matter and Secondary Gravitational Waves from Warm Higgs-G Inflation
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• First and second order cosmological perturbations in light mass Galileon models
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• Cosmological aspects of cubic Galileon massive gravity