A model of interacting holographic dark energy at the Ricci's scale

Understand

We study a holographic cosmological model in which the infrared cutoff is set by the Ricci's length and dark matter and dark energy do not evolve on their own but interact non-gravitationally with each other.

• This greatly alleviates the cosmic coincidence problem because the ratio between both components does not vanish at any time.
• We constrain the model with observational data from supernovae, cosmic background radiation, baryon acoustic oscillations, gas mass fraction in galaxy clusters, the history of the Hubble function, and the growth function.