Testing general relativity in cosmology

M Ishak - Living Reviews in Relativity, 2019 - Springer
We review recent developments and results in testing general relativity (GR) at cosmological
scales. The subject has witnessed rapid growth during the last two decades with the aim of …

Testing screened modified gravity

P Brax, S Casas, H Desmond, B Elder - Universe, 2021 - mdpi.com
Long range scalar fields with a coupling to matter appear to violate known bounds on
gravitation in the solar system and the laboratory. This is evaded thanks to screening …

Towards testing the theory of gravity with DESI: summary statistics, model predictions and future simulation requirements

S Alam, C Arnold, A Aviles, R Bean… - … of Cosmology and …, 2021 - iopscience.iop.org
Shortly after its discovery, General Relativity (GR) was applied to predict the behavior of our
Universe on the largest scales, and later became the foundation of modern cosmology. Its …

Using voids to unscreen modified gravity

B Falck, K Koyama, GB Zhao… - Monthly Notices of the …, 2018 - academic.oup.com
The Vainshtein mechanism, present in many models of gravity, is very effective at screening
dark matter haloes such that the fifth force is negligible and general relativity is recovered …

An accurate perturbative approach to redshift space clustering of biased tracers in modified gravity

G Valogiannis, R Bean, A Aviles - Journal of Cosmology and …, 2020 - iopscience.iop.org
We extend the scale-dependent Gaussian Streaming Model (GSM) to produce analytical
predictions for the anisotropic redshift-space correlation function for biased tracers in …

Improved analytical modeling of the nonlinear power spectrum in modified gravity cosmologies

S Gupta, WA Hellwing, M Bilicki - Physical Review D, 2023 - APS
Reliable analytical modeling of the nonlinear power spectrum (PS) of matter perturbations is
among the chief prerequisites for cosmological analyses from the largest sky surveys. This is …

Universality of the halo mass function in modified gravity cosmologies

S Gupta, WA Hellwing, M Bilicki, JE García-Farieta - Physical Review D, 2022 - APS
We study the halo mass function (HMF) in modified gravity (MG) models using a set of large
N-body simulations—the elephant suite. We consider two popular beyond-general-relativity …

A perturbative approach to the redshift space correlation function: beyond the Standard Model

B Bose, K Koyama - Journal of Cosmology and Astroparticle …, 2017 - iopscience.iop.org
We extend our previous redshift space power spectrum code to the redshift space
correlation function. Here we focus on the Gaussian Streaming Model (GSM). Again, the …

The matter density PDF for modified gravity and dark energy with Large Deviations Theory

M Cataneo, C Uhlemann, C Arnold… - Monthly Notices of …, 2022 - academic.oup.com
We present an analytical description of the probability distribution function (PDF) of the
smoothed 3D matter density field for modified gravity and dark energy. Our approach, based …

Evolution of skewness and kurtosis of cosmic density fields

J Einasto, A Klypin, G Hütsi, LJ Liivamägi… - Astronomy & …, 2021 - aanda.org
Aims. We investigate the evolution of the one-point probability distribution function (PDF) of
the dark matter density field and the evolution of its moments for fluctuations that are …