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On the evidence of dynamical dark energy

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arxiv 2411.16046 v1 pith:26CPDEPP submitted 2024-11-25 astro-ph.CO gr-qc

classification astro-ph.COgr-qc
keywords modeldarkdatadesienergydynamicalevidencesslcpl
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abstract

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 $\Lambda$CDM model, we find that the influence of DESI BAO data on the constraint of $w_0$ is small in the SSLCPL model. In comparison to the CPL model, the tension with the $\Lambda$CDM 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.

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Cited by 2 Pith papers

Reviewed papers in the Pith corpus that reference this work. Sorted by Pith novelty score.

  1. Observational and Thermodynamic aspects of one-dimensional Dark Energy EoS parametrization models

    gr-qc 2026-03 conditional novelty 4.0 of 10

    Gong–Zhang Type I/II dark-energy parametrizations remain competitive with ΛCDM under late-time probes, with GZ2 preferred and configuration entropy sensitive to late-time clustering.

  2. Interacting Scalar Fields as Dark Energy and Dark Matter in Einstein scalar Gauss Bonnet Gravity

    gr-qc 2025-07 unverdicted novelty 4.0 of 10

    Interacting scalar fields coupled to Gauss-Bonnet gravity yield viable dark energy and dark matter models that match Pantheon+ and DES supernova data while preferring over LambdaCDM at high redshifts with Roman mocks.

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