In this review, we investigate the question of backreaction in different approaches to
cosmological perturbation theory, and with a special focus on quantum theoretical aspects …

We review spherical and inhomogeneous analytic solutions of the field equations of Einstein
and of scalar–tensor gravity, including Brans–Dicke theory, non-minimally (possibly …

Dark Energy - IOPscience Skip to content IOP Science home Accessibility Help Search all
IOPscience content Search Article Lookup Select journal (required) Volume number: Issue …

Abstract Structure occurs over a vast range of scales in the Universe. Our large-scale
cosmological models are coarse-grained representations of what exists, which have much …

We study the matter and velocity divergence power spectra in af (R) gravity theory and their
time evolution measured from several large-volume N-body simulations with varying box …

In this paper, instead of invoking Dark Energy, we try and fit various cosmological
observations with a large Gpc scale under-dense region (Void) which is modeled by a …

Using the redshift space distortions of void–galaxy cross-correlation function we analyse the
dynamics of voids embedded in different environments. We compute the void–galaxy cross …

Light from 'point sources' such as supernovae is observed with a beam width of the order of
the sources' size–typically less than 1 au. Such a beam probes matter and curvature …

In the standard cosmological framework, the Hubble diagram is interpreted by assuming that
the light emitted by standard candles propagates in a spatially homogeneous and isotropic …

The possibility of obtaining symbolic expressions for cosmic backreaction is explored
through a case study of so-called 2-region models. By using the publicly available symbolic …