Cosmological constraints on the generalized holographic dark energy

TL;DR

This paper uses observational data and MCMC methods to constrain the generalized holographic dark energy model, finding it can cross the phantom divide and providing the most stringent parameter bounds to date.

Contribution

It presents the first comprehensive observational constraints on the generalized holographic dark energy model using multiple cosmological datasets.

Findings

The equation of state can cross w = -1.

Most stringent constraints on GH model parameters.

Supports the viability of GH dark energy with phantom crossing.

Abstract

We use the Markov ChainMonte Carlo method to investigate global constraints on the generalized holographic (GH) dark energy with flat and non-flat universe from the current observed data: the Union2 dataset of type supernovae Ia (SNIa), high-redshift Gamma-Ray Bursts (GRBs), the observational Hubble data (OHD), the cluster X-ray gas mass fraction, the baryon acoustic oscillation (BAO), and the cosmic microwave background (CMB) data. The most stringent constraints on the GH model parameter are obtained. In addition, it is found that the equation of state for this generalized holographic dark energy can cross over the phantom boundary wde =-1.