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On the Evidence of Dynamical Dark Energy
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Journal Article
On the Evidence of Dynamical Dark Energy
2025
Overview
To elucidate the robustness of the baryon acoustic oscillation (BAO) data measured by the dark energy spectroscopic instrument (DESI) in capturing the dynamical behavior of dark energy, we assess the model dependence of the evidence for dynamical dark energy inferred from the DESI BAO data. While the DESI BAO data slightly tightens the constraints on model parameters and increases the tension between the Chevallier–Polarski–Linder (CPL) model and the ΛCDM model, we find that the influence of DESI BAO data on the constraint of w0 is small in the SSLCPL model. In comparison to the CPL model, the tension with the ΛCDM model is reduced for the SSLCPL model, suggesting that the evidence for dynamical dark energy from DESI BAO data is dependent on cosmological models. The inclusion of spatial curvature has little impact on the results in the SSLCPL model.
Publisher
MDPI AG
Subject
