Late-time cosmological constraints on three holographic dark energy models with DESI DR2 BAO and Type Ia supernovae
arXiv:2607.09732 · doi:10.1140/epjc/s10052-026-16300-z
Abstract
We constrain three holographic-inspired dark energy models, namely holographic dark energy (HDE), agegraphic dark energy (ADE), and Ricci dark energy (RDE), using late-time observations from cosmic chronometers, Type Ia supernovae (SNe Ia), DESI DR2 baryon acoustic oscillations (BAO), and {redshift-space distortion (RSD) growth measurements}. Five data combinations are considered: Pantheon+, DESI DR2+Pantheon+, DESI DR2+DES-Dovekie, DESI DR2+DESY5, and {DESI DR2+DES-Dovekie+RSD}. We perform Bayesian Markov chain Monte Carlo parameter estimation and compare the models with AIC and BIC. In the BAO-included combinations, HDE gives --, --, and , indicating an expansion history close to the de Sitter boundary rather than a robust phantom regime. ADE yields a stable agegraphic parameter --, while RDE gives -- and persistently favors a low matter density, --. {Treating as a free parameter reveals a strong negative correlation between and , and the RSD-included combination provides a growth-level consistency check through without constituting a full perturbative stability analysis.} None of the three models significantly alleviates the Hubble tension. Overall, HDE shows the most balanced phenomenological behavior among the three models, although current late-time data do not decisively prefer it over .
arXiv comment15 pages, 6 figures, submitted to EPJC
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