A parameterized equation of state for dark energy and Hubble Tension

TL;DR

This paper introduces a new parameterized dark energy equation of state tested against multiple cosmological observations, showing promising results in addressing the Hubble tension.

Contribution

It presents a novel parameterized model for dark energy's equation of state and demonstrates its consistency with observational data, offering a potential solution to the Hubble tension.

Findings

Best-fit Hubble constant H_0=73.96 km/s/Mpc

Model aligns well with observational data

Provides a promising approach to Hubble tension

Abstract

We propose a parameterized equation of state for dark energy and perform observational tests with the Hubble parameter measurements, the Pantheon supernova sample, baryon acoustic oscillations, and DESI DR2 data. We obtain the best-fit values for the parameters as: $H_0=73.96\pm 0.16$, $\Omega_{\rm m}=0.2434\pm 0.0079$, and $\alpha=-0.00049\pm 0.00092$, demonstrating that the model exhibits a high degree of consistency with astronomical observations and provides a promising parameterized method for addressing the Hubble tension.