The interaction between dark matter and dark energy (DE) can be incorporated into field
theory models of DE that have proved successful in alleviating the coincidence problem. We …

Despite its continued observational successes, there is a persistent (and growing) interest in
extending cosmology beyond the standard model, Λ CDM. This is motivated by a range of …

We present a detailed overview of the cosmological surveys that we aim to carry out with
Phase 1 of the Square Kilometre Array (SKA1) and the science that they will enable. We …

We present a framework for forecasting cosmological constraints from future neutral
hydrogen intensity map** experiments at low to intermediate redshifts. In the process, we …

For the last 100 years, General Relativity (GR) has taken over the gravitational theory mantle
held by Newtonian Gravity for the previous 200 years. This article reviews the status of GR in …

Gravitational radiation offers a unique possibility to study the large-scale structure of the
Universe, gravitational wave sources and propagation in a completely novel way. Given that …

The detection of the accelerated expansion of the Universe has been one of the major
breakthroughs in modern cosmology. Several cosmological probes (Cosmic Microwave …

Context. Observations of the redshifted 21-cm line of neutral hydrogen (HI) are a new and
powerful window of observation that offers us the possibility to map the spatial distribution of …