Abstract The standard Λ Cold Dark Matter (ΛCDM) cosmological model provides a good
description of a wide range of astrophysical and cosmological data. However, there are a …

The simplest ΛCDM model provides a good fit to a large span of cosmological data but
harbors large areas of phenomenology and ignorance. With the improvement of the number …

Singularities in any physical theory are either remarkable indicators of the unknown
underlying fundamental theory, or indicate a change in the description of the physical reality …

We explore whether nonstandard dark sector physics might be required to solve the existing
cosmological tensions. The properties we consider in combination are (a) an interaction …

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 …

The question of whether cosmic microwave background (CMB) temperature and polarization
data from Planck favor a spatially closed universe with curvature parameter Ω K< 0 has been …

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 investigate the observational consequences of a novel class of stable interacting dark
energy (IDE) models, featuring interactions between dark matter (DM) and dark energy (DE) …

We investigate the observational constraints on an interacting vacuum energy scenario with
two different neutrino schemes (with and without a sterile neutrino) using the most recent …

We investigate interacting scenarios that belong to a wider class, since they include a
dynamical dark energy component whose equation of state follows various one-parameter …