Late time interacting cosmologies and the Hubble constant tension

Understand

In this manuscript we reassess the potential of interacting dark matter-dark energy models in solving the Hubble constant tension.

• These models have been proposed but also questioned as possible solutions to the $H_0$ problem.
• Here we examine several interacting scenarios against cosmological observations, focusing on the important role played by the calibration of Supernovae data.
• In order to reassess the ability of interacting dark matter-dark energy scenarios in easing the Hubble constant tension, we systematically confront their theoretical predictions using a prior on the Supernovae Ia absolute magnitude $M_B$, which has been argued to be more robust and certainly less controversial than using a prior on the Hubble constant $H_0$.