Testing General Relativity from Curvature & Energy contents at Cosmological scale

TL;DR

This paper investigates the cosmological implications of treating geometrical curvature independently from energy contents, using Planck, BAO, and SNIa data to constrain parameters and explore the curvature-dark energy degeneracy.

Contribution

It introduces a novel approach allowing curvature to vary independently, providing new constraints and insights into the curvature-energy relationship in cosmology.

Findings

Constraints on cosmological parameters with independent curvature.

Analysis of curvature-dark energy degeneracy behavior.

Potential explanation for Hubble parameter discrepancy.

Abstract

In this work we examine what are the cosmological implications of allowing the geometrical curvature density to behave independently from the energy density contents. Using the full data extracted by Planck mission from CMB, combined with BAO and SNIa measurements, we derive, in the light of this approach, new constraints on the cosmological parameters. In particular we determine the behavior of the curvature dark energy degeneracy when allowing a varying equation of state for the latter. We also examine whether this approach could bridge the gap recently found between the Hubble parameter value determined from CMB and that from the local universe measurements