Kaniadakis holographic dark energy: observational constraints and global dynamics

TL;DR

This paper tests Kaniadakis holographic dark energy against observational data, constraining its parameters and analyzing the universe's dynamics, finding it consistent with standard cosmology and identifying the transition from deceleration to acceleration.

Contribution

It provides the first observational constraints on Kaniadakis holographic dark energy and explores its global dynamical behavior in the universe's evolution.

Findings

Kaniadakis parameter constrained near zero, matching standard entropy

Matter density parameter slightly smaller than in ΛCDM

Deceleration-acceleration transition redshift around 0.86

Abstract

We investigate Kaniadakis-holographic dark energy by confronting it with observations. We perform a Markov Chain Monte Carlo analysis using cosmic chronometers, supernovae type Ia, and Baryon Acoustic Oscillations data. Concerning the Kaniadakis parameter, we find that it is constrained around zero, namely around the value in which Kaniadakis entropy recovers standard Bekenstein-Hawking one. Additionally, for the present matter density parameter $\Omega_m^{(0)}$, we obtain a value slightly smaller compared to $\Lambda$CDM scenario. Furthermore, we reconstruct the evolution of the Hubble, deceleration and jerk parameters extracting the deceleration-acceleration transition redshift as $z_T = 0.86^{+0.21}_{-0.14}$. Finally, performing a detailed local and global dynamical system analysis, we find that the past attractor of the Universe is the matter-dominated solution, while the late-time stable solution is the dark-energy-dominated one.