paper

Cosmological Constraints on the Phenomenological Interacting Dark Energy Model with Fermi Gamma-Ray Bursts and DESI DR2

arXiv:2511.16032 · doi:10.1016/j.jheap.2025.100534

Abstract

In this work, we constrain the phenomenological interacting dark energy (IDE) model using \emph{Fermi} gamma-ray burst (GRB) dataset and the latest baryon acoustic oscillation (BAO) data from the Dark Energy Spectroscopic Instrument (DESI) Data Release 2 (DR2). Through a joint Bayesian analysis, we perform a cosmological comparative assessment of the CDM, CDM, and CPL models with the phenomenological IDE model. For the phenomenological IDE model in a flat universe with \emph{Fermi} samples and DESI DR2, we obtain: , with the GOLD sample () and , with the FULL sample (), respectively. Our analysis shows that the CDM model without interaction (, ) is consistent with the latest \emph{Fermi} sample and DESI DR2 at confidence level. We find no significant deviations from the standard model using AIC and BIC criterias.

Accepted for publication in Journal of High Energy Astrophysics. 13 pages, 3 figures, 2 tables

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