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Uncorrelated estimations of $H_0$ redshift evolution from DESI baryon acoustic oscillation observations

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arxiv 2406.02019 v2 pith:GYMSIB7R submitted 2024-06-04 astro-ph.CO

X. D. Jia , J. P. Hu , S. X. Yi , F. Y. Wang (NJU) This is my paper · ORCID
classification astro-ph.CO
keywords differenthubbleconstantdesiredshiftacousticbaosbaryon
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abstract

The Dark Energy Spectroscopic Instrument (DESI) collaboration recently released the first year data of baryon acoustic oscillations (BAOs). Based on the five different tracers, the cosmological constraint shows a hint of deviation from the standard $\Lambda$CDM model. In this letter, we combine the DESI BAOs with other cosmic probes to constrain the evolution of Hubble constant as a function of redshift in the flat $\Lambda$CDM model. The non-parametric method is used to estimate the value of Hubble constant at different redshift bins. The correlation among different bins are removed by diagonalizing the covariance matrix. The joint data sample demonstrate a decreasing trend of Hubble constant with a significance of $6.4 \sigma$, which can naturally resolve the Hubble tension. To avoid statistical effects caused by the binning methods, we tested other three different binning methods and also found a decreasing trend. It may be due to dynamical dark energy or modified gravity.

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Cited by 6 Pith papers

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

  1. BAO miscalibration cannot rescue late-time solutions to the Hubble tension

    astro-ph.CO 2025-10 accept novelty 6.0 of 10

    Even after rescaling BAO data to prefer H0≈73 km/s/Mpc, none of six tested late-time dark-energy models can resolve the Hubble tension once unanchored SNeIa and CMB geometry are included.

  2. Can cosmic voids ease the Hubble tension? Local expansion in $w_0w_a$CDM

    astro-ph.CO 2026-07 conditional novelty 5.0 of 10

    A KBC-like local void lowers the SH0ES–Planck Hubble tension to about 2σ but cannot fully resolve it, and evolving dark energy shifts the required void depth by only ~1%.

  3. The redshift dependence of the inferred $H_0$ in a local void solution to the Hubble tension

    astro-ph.CO 2024-12 conditional novelty 5.0 of 10

    A local-void model with a Planck-compatible background predicts a declining H0(z) that broadly matches the Jia et al. 2023 and 2024 measurements for Gaussian and Exponential void profiles.

  4. Newest measurements of Hubble constant from DESI 2024 BAO observations

    astro-ph.CO 2024-12 conditional novelty 4.0 of 10

    Using DESI BAO distance ratios, Pantheon+ supernovae, and cosmic chronometers, the paper derives H0 = 68.4 (+1.0, -0.8) km/s/Mpc, matching Planck and TRGB and remaining 4.3 sigma from SH0ES.

  5. DESI and SNe: Dynamical Dark Energy, $\Omega_m$ Tension or Systematics?

    astro-ph.CO 2024-12 conditional novelty 4.0 of 10

    Reconstructing Ωm from DESI's w0waCDM fits shows an SNe-driven low-redshift departure from ΛCDM, with a 3.4σ disagreement between a DES supernova subsample and DESI full-shape clustering at the same effective redshift.

  6. Testing $\gamma\delta$CDM Model in the Redshift Bins

    astro-ph.CO 2025-01

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