Chameleon fields may modify gravity on cluster scales while recovering general relativity
locally. This article reviews signatures of chameleon modifications in the nonlinear …

We study the implications of Planck data for models of dark energy (DE) and modified gravity
(MG) beyond the standard cosmological constant scenario. We start with cases where the …

The current standard cosmological model is constructed within the framework of general
relativity with a cosmological constant Λ, which is often associated with dark energy, and …

We present the current accounting of systematic effect uncertainties for the Low Frequency
Instrument (LFI) that are relevant to the 2015 release of the Planck cosmological results …

We implement the effective field theory (EFT) approach to dark energy and modified gravity
in the public Einstein-Boltzmann solver camb. The resulting code, which we dub eftcamb, is …

We forecast the main cosmological parameter constraints achievable with the CORE space
mission which is dedicated to mapping the polarisation of the Cosmic Microwave …

We propose a novel method to test the gravitational interactions in the outskirts of galaxy
clusters. When gravity is modified, this is typically accompanied by the introduction of an …

We forecast the main cosmological parameter constraints achievable with the CORE space
mission which is dedicated to mapping the polarisation of the Cosmic Microwave …

The recent measurements of cosmic microwave background (CMB) temperature and
polarization anisotropies made by the Planck satellite have provided impressive …

In order to explain cosmic acceleration without invoking``dark''physics, we consider f (R)
modified gravity models, which replace the standard Einstein-Hilbert action in General …