Hubble tension and matter inhomogeneities: a theoretical perspective

Understand

We have studied how local density perturbations could reconcile the Hubble tension.

• We reproduced a local void through a perturbed FLRW metric with a potential $\Phi$ which depends on both time and space.
• This method allowed us to obtain a perturbed luminosity distance, which is compared with both local and cosmological data.
• However, when constraining local cosmological parameters with previous results, we found that neither $\Lambda$CDM nor $\Lambda(\omega)$CDM cannot solve the Hubble tension.