We have analysed the Pantheon+ sample using a new likelihood model that replaces the
single Type Ia supernovae (SnIa) absolute magnitude parameter M used in the standard …

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 …

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 …

Recent advancements have shown tensions between observations and our current
understanding of the Universe. Such observations may include the H 0 tension and massive …

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 …

Recent puzzling observations, such as the H 0 tension, large-scale anisotropies, and
massive disk galaxies at high redshifts, have been challenging the standard cosmological …

The unprecedented imaging power of JWST provides new abilities to observe the shapes of
objects in the early Universe in a way that has not been possible before. Recently, JWST …

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 …

The cosmological principle asserts that on sufficiently large scales the Universe is
homogeneous and isotropic on spatial slices. To deviate from this principle requires a …