A number of challenges to the standard Λ CDM model have been emerging during the past
few years as the accuracy of cosmological observations improves. In this review we discuss …

Abstract The Nobel Prize winning confirmation in 1998 of the accelerated expansion of our
Universe put into sharp focus the need of a consistent theoretical model to explain the origin …

The Hubble tension has now grown to a level of significance which can no longer be
ignored and calls for a solution which, despite a huge number of attempts, has so far eluded …

We examine interactions between dark matter and dark energy in light of the latest
cosmological observations, focusing on a specific model with coupling proportional to the …

We explore the role of redshift-space galaxy clustering data in constraining nongravitational
interactions between dark energy (DE) and dark matter (DM), for which state-of-the-art limits …

We review the paradigm of holographic dark energy (HDE), which arises from a theoretical
attempt of applying the holographic principle (HP) to the dark energy (DE) problem. Making …

The recent determination of the local value of the Hubble constant by Riess et al., 2016
(hereafter R16) is now 3.3 sigma higher than the value derived from the most recent CMB …

Abstract Euclid is a European Space Agency medium-class mission selected for launch in
2020 within the cosmic vision 2015–2025 program. The main goal of Euclid is to understand …

We analyse the BOSS DR12 multipoles of the galaxy power spectrum jointly with
measurements of the BAO scale for three different models of dark energy. We use recent …

Despite the fact that a rigid ${\rm {\Lambda}} $-term is a fundamental building block of the
concordance ΛCDM model, we show that a large class of cosmological scenarios with …