Observational constraints on holographic tachyonic dark energy in interaction with dark matter

TL;DR

This paper investigates a holographic tachyonic dark energy model interacting with dark matter, comparing its predictions with observational data, and finds the coupling constant is compatible with zero, indicating a deviation from a cosmological constant.

Contribution

It introduces a holographic tachyonic dark energy model with interaction with dark matter and compares it with multiple observational datasets.

Findings

Coupling constant compatible with zero

Dark energy differs from a cosmological constant

Model fits observational data reasonably well

Abstract

We discuss an interacting tachyonic dark energy model in the context of the holographic principle. The potential of the holographic tachyon field in interaction with dark matter is constructed. The model results are compared with CMB shift parameter, baryonic acoustic oscilations, lookback time and the Constitution supernovae sample. The coupling constant of the model is compatible with zero, but dark energy is not given by a cosmological constant.