Abstract The standard Λ Cold Dark Matter cosmological model provides an amazing
description of a wide range of astrophysical and astronomical data. However, there are a …

We consider a k-essence scalar field model for the late-time cosmic acceleration in which
the sound speed, parametrized as cs is constant. We compute the relevant background and …

We introduce Hi-COLA, a code designed to run fast, approximate N-body simulations of non-
linear structure formation in reduced Horndeski gravity. Given an input Lagrangian, Hi-COLA …

We propose an analytical parametrization of the comoving distance and Hubble parameter
to study the cosmic expansion history beyond the vanilla Λ CDM model. The parametrization …

For the first time, we reconstruct the dark energy equation of the state parameter w from the
combination of background and perturbation observations, specifically combining the …

We perform N-body simulations for f (T) gravity using the ME-Gadget code, in order to
investigate the structure formation process in detail for the first time. Focusing on the power …

We study detectability of the deviation in interacting and non-interacting cubic Galileon
models from the Λ CDM model through the 21-cm power spectrum. We show that the …

In light of the cosmological observations, we investigate dark energy models from the
Horndeski theory of gravity. In particular, we consider cosmological models with the …

This study combines cosmic chronometer (CC) Hubble parameter data with growth rate (f)
observations to constrain the $\Omega_ {\rm m0} $ parameter. Utilizing a consistency …

Cubic Galileon massive gravity is a development of de Rham–Gabadadze-Tolley massive
gravity theory in which the space of the Stueckelberg field is broken. We consider the cubic …