The cosmological principle (CP)—the notion that the Universe is spatially isotropic and
homogeneous on large scales—underlies a century of progress in cosmology. It is …

The assumption of isotropy–that the Universe looks the same in all directions on large
scales–is fundamental to the standard cosmological model. It is therefore critical to …

We propose an effective model to describe the bias induced on cosmological observables
by Laniakea, the gravitational supercluster hosting the Milky Way, which was defined using …

We decompose Pantheon+ Type Ia supernovae (SN) in hemispheres on the sky finding
angular variations up to 4 km/s/Mpc, corresponding to a statistical significance up to 1.9 σ, in …

The cosmological principle is fundamental to the standard cosmological model. It assumes
that the Universe is homogeneous and isotropic on very large scales. As the basic …

In this paper we determine the dipole in the distance redshift relation from the Pantheon+
data. We find that, while its amplitude roughly agrees with the dipole found in the cosmic …

We use the hemisphere comparison method to test the isotropy of the SnIa absolute
magnitudes of the Pantheon+ and SH0ES samples in various redshift/distance bins. We …

We explore the possibility of characterizing the expansion rate on local cosmic scales
$(z\lesssim 0.1) $, where the cosmological principle is violated, in a model-independent …

In this work we present the first results from a new ray-tracing tool to calculate cosmological
distances in the context of fully nonlinear general relativity. We use this tool to study the …

We analyze the possibility of global anisotropy of the Universe. We consider an altered
Friedmann Lemaitre Robertson Walker metric in which there are different scale factors along …