# Structure Formation in Modified Gravity Scenarios

@article{Brax2012StructureFI, title={Structure Formation in Modified Gravity Scenarios}, author={Philippe Brax and Patrick Valageas}, journal={Physical Review D}, year={2012}, volume={86}, pages={063512} }

We study the growth of structures in modified gravity models where the Poisson equation and the relationship between the two Newtonian potentials are modified by explicit functions of space and time. This parameterisation applies to the $f(R)$ models and more generally to screened modified gravity models. We investigate the linear and weakly nonlinear regimes using the "standard" perturbative approach and a resummation technique, while we use the spherical dynamics to go beyond low-order…

## 27 Citations

### Impact on the power spectrum of Screening in Modified Gravity Scenarios

- Physics
- 2013

We study the effects of screened modified gravity of the $f(R)$, dilaton and symmetron types on structure formation, from the quasi-linear to the non-linear regime, using semi-analytical methods. For…

### Modelling the non-linear bispectrum in modified gravity

- Geology
- 2019

Future large-scale structure surveys will measure three-point correlations with high statistical significance. This will offer significant improvements on our understanding of gravity, provided we…

### Modelling the matter bispectrum at small scales in modified gravity

- GeologyJournal of Cosmology and Astroparticle Physics
- 2020

Future large-scale structure surveys will measure three-point statistics with high statistical significance. This will offer significant improvements on our understanding of gravity, provided we can…

### The evolution of the large-scale structure of the universe: beyond the linear regime

- Physics
- 2013

These lecture notes introduce analytical tools, methods and results describing the growth of cosmological structure beyond the linear regime. The presentation is focused on the single flow regime of…

### Lyman-α power spectrum as a probe of modified gravity

- PhysicsJournal of Cosmology and Astroparticle Physics
- 2019

We investigate the impact of modified-gravity models on the Lyman-α power spectrum. Building a simple analytical modeling, based on a truncated Zeldovich approximation, we estimate the intergalactic…

### Visualization of cosmological density fluctuations with phase space analysis: case study: Brans–Dicke theory

- PhysicsThe European Physical Journal C
- 2019

Cosmological perturbation theory is a powerful tool to understanding the large-scale structure of the Universe. However, the set of field equations describes the general linear perturbations for the…

### Impact of a warm dark matter late-time velocity dispersion on large-scale structures

- Physics
- 2012

We investigate whether the late-time (at $z\leq 100$) velocity dispersion expected in Warm Dark Matter scenarios could have some effect on the cosmic web (i.e., outside of virialized halos). We…

### The Parameterized Post-Friedmann Framework for Theories of Modified Gravity: Concepts, Formalism and Examples.

- Physics
- 2013

A unified framework for theories of modified gravity will be an essential tool for interpreting the forthcoming deluge of cosmological data. We present such a formalism, the Parameterized…

### Matter power spectrum from a Lagrangian-space regularization of perturbation theory

- Physics
- 2013

We present a new approach to computing the matter density power spectrum, from large linear scales to small highly nonlinear scales. Instead of explicitly computing a partial series of high-order…

### First and second order cosmological perturbations in light mass Galileon models

- Physics
- 2017

In this paper, we investigate the first and second order cosmological perturbations in the light mass Galileon (LMG) scenario. LMG action includes the cubic Galileon term along with the standard…

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