Modified Gravity and Cosmology

  title={Modified Gravity and Cosmology},
  author={Timothy Clifton and Pedro G. Ferreira and Antonio Padilla and Constantinos Skordis},
  journal={Physics Reports},
Abstract In this review we present a thoroughly comprehensive survey of recent work on modified theories of gravity and their cosmological consequences. Amongst other things, we cover General Relativity, scalar–tensor, Einstein–aether, and Bimetric theories, as well as TeVeS, f ( R ) , general higher-order theories, Hořava–Lifschitz gravity, Galileons, Ghost Condensates, and models of extra dimensions including Kaluza–Klein, Randall–Sundrum, DGP, and higher co-dimension braneworlds. We also… Expand
Aspects of modified gravity
To date, General Relativity provides the best description of the gravitational interaction. It can accurately describe the motion of the planets within the solar system. However, on large scalesExpand
Phenomenological tests of modified gravity
The main goal of this thesis is to test the viability of some modified theories of gravity suitable to describe gravitational phenomena at cosmological and astronomical scales. In the first part ofExpand
Cosmological tests of modified gravity.
  • K. Koyama
  • Physics, Medicine
  • Reports on progress in physics. Physical Society
  • 2016
An overview of recent developments in modified gravity theories including f(R) gravity, braneworld gravity, Horndeski theory and massive/bigravity theory is given and how to test modifications of gravity on cosmological scales is discussed. Expand
Parameterized post-Newtonian cosmology
Einstein's theory of gravity has been extensively tested on solar system scales, and for isolated astrophysical systems, using the perturbative framework known as the parameterized post-NewtonianExpand
Beyond the concordance cosmology
For almost a hundred years now, Einstein’s General Relativity theory has played a pivotal role in our understanding of the Universe. The recent realization of the accelerated cosmic expansion,Expand
Testing general relativity in cosmology
The review aims at providing an overall picture of the subject and an entry point to students and researchers interested in joining the field and a quick reference to recent results and constraints on testing gravity at cosmological scales. Expand
Disformal Theories of Gravity: From the Solar System to Cosmology
This paper is concerned with theories of gravity that contain a scalar coupled both conformally and disformally to matter through the metric. By systematically deriving the non-relativistic limit, itExpand
Measuring Gravity at Cosmological Scales
This review is a pedagogical introduction to models of gravity and how they are constrained through cosmological observations. We focus on the Horndeski scalar-tensor theory and on the quantitiesExpand
Cosmological and astrophysical applications of modified theories of gravity.
In this work, we study cosmological and astrophysical applications of the recently proposed generalized hybrid metric-Palatini gravity theory, which combines features of both the metric and theExpand
Fab Four: When John and George Play Gravitation and Cosmology
Scalar-tensor theories of gravitation have recently regained a great interest after the discovery of the Chameleon mechanism and of the Galileon models. The former allows, in principle, to reconcileExpand


Consistent cosmological modifications to the Einstein equations
General relativity is a phenomenologically successful theory that rests on firm foundations, but has not been tested on cosmological scales. The deep mystery of dark energy (and possibly even theExpand
TOPICAL REVIEW: The tensor-vector-scalar theory and its cosmology
Over the last few decades, astronomers and cosmologists have accumulated vast amounts of data clearly demonstrating that our current theories of fundamental particles and of gravity are inadequate toExpand
Modified-source gravity and cosmological structure formation
One way to account for the acceleration of the universe is to modify general relativity, rather than introducing dark energy. Typically, such modifications introduce new degrees of freedom. It isExpand
Softly Massive Gravity
Large-distance modification of gravity may be the mechanism for solving the cosmological constant problem. A simple model of the large-distance modification — four-dimensional (4D) gravity with theExpand
Linear growth rate of structure in parametrized post-Friedmannian universes
A possible solution to the dark energy problem is that Einstein's theory of general relativity is modified. A suite of models have been proposed that, in general, are unable to predict the correctExpand
f(R) actions, cosmic acceleration and local tests of gravity
We study spherically symmetric solutions in f(R) theories and its compatibility with local tests of gravity. We start by clarifying the range of validity of the weak field expansion and show that,Expand
Dark energy cosmology from higher-order, string-inspired gravity, and its reconstruction
In this paper we investigate the cosmological effects of modified gravity with string curvature corrections added to the Einstein-Hilbert action in the presence of a dynamically evolving scalar fieldExpand
Seesaw modification of gravity
We discuss a model in which the fundamental scale of gravity is restricted to 10^{-3} eV. An observable modification of gravity occurs simultaneously at the Hubble distance and at around 0.1 mm.Expand
Parameterizing scalar-tensor theories for cosmological probes
We study the evolution of density perturbations for a class of f(R) models which closely mimic ΛCDM background cosmology. Using the quasi-static approximation, and the fact that these models areExpand
Cosmology in nonrelativistic general covariant theory of gravity
Horava and Melby-Thompson recently proposed a new version of the Horava-Lifshitz theory of gravity, in which the spin-0 graviton is eliminated by introducing a Newtonian prepotential {phi} and aExpand