Reconstructing the interaction between the dark matter and holographic dark energy

TL;DR

This paper reconstructs the interaction rate between dark matter and holographic dark energy using observational data, revealing that negative interactions are permitted and that common models often fail to describe the reconstructed interaction accurately.

Contribution

It introduces a novel reconstruction method for dark matter-dark energy interaction based on parameterized equations of state and observational constraints.

Findings

Negative interactions are allowed by observational data.

Standard phenomenological models often do not fit the reconstructed interaction.

Alternative interaction models are discussed.

Abstract

We reconstruct the interaction rate between the dark matter and the holographic dark energy with the parameterized equation of states and the future event horizon as the infrared cut-off length. It is shown that the observational constraints from the 192 SNIa and BAO measurement permit the negative interaction in the wide region. Moreover, the usual phenomenological descriptions can not describe the reconstructed interaction well for many cases. The other possible interaction is also discussed.