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 …

The Λ CDM model provides a good fit to most astronomical observations but harbors large
areas of phenomenology and ignorance. With the improvements in the precision and …

The KBC void is a local underdensity with the observed relative density contrast δ≡ 1−
ρ/ρ0= 0.46±0.06 between 40 and 300 Mpc around the Local Group. If mass is conserved in …

A new component added to the standard model of cosmology that behaves like a
cosmological constant at early times and then dilutes away as radiation or faster can resolve …

The cosmic distance ladder is the succession of techniques by which it is possible to
determine distances to astronomical objects. Here, we present a new method to build the …

Most cosmological data analysis today relies on the Friedmann-Lemaître-Robertson-Walker
(FLRW) metric, providing the basis of the current standard cosmological model. Within this …

We perform large-scale cosmological simulations that solve Einstein's equations directly via
numerical relativity. Starting with initial conditions sampled from the cosmic microwave …

We assess the dominant low-redshift anisotropic signatures in the distance-redshift relation
and redshift drift signals. We adopt general-relativistic irrotational dust models allowing for …

Recently it has been noted by Di Valentino, Melchiorri and Silk (2019) that the enhanced
lensing signal relative to that expected in the spatially flat ΛCDM model poses a possible …