Hubble Parameter and Baryon Acoustic Oscillation Measurement Constraints on the Hubble Constant, the Deviation from the Spatially Flat ΛCDM Model, the Deceleration–Acceleration Transition Redshift,…
By Hai-Bo Yu, Bharat Ratra, Fa-yin Wang. 2017
288 citations recorded by the source corpus.
We compile a complete collection of reliable Hubble parameter H(z) data to redshift z ≤ 2.36 and use them with the Gaussian Process method to determine continuous H(z) functions for various data subsets. From these continuous H(z)'s, summarizing across the data subsets considered, we find H0 ∼ 67 ± 4 km s−1 Mpc−1, more consistent with the recent lower values determined using a variety of techniques. In most data subsets, we see a cosmological deceleration–acceleration transition at 2σ significance, with the data subsets transition redshifts varying over at 1σ significance. We find that the flat-ΛCDM model is consistent with the H(z) data to a z of 1.5 to 2.0, depending on data subset considered, with 2σ deviations from flat-ΛCDM above this redshift range. Using the continuous H(z) with baryon acoustic oscillation distance-redshift observations, we constrain the current spatial curvature density parameter to be , consistent with a flat universe, but the large error bar does not rule out small values of spatial curvature that are now under debate.
Subfields: Astronomy and Astrophysics
View Paper: https://www.semanticscholar.org/paper/369a75df3cbb61a7cd446170f6124d4141a5c8d1
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In Astronomy and Astrophysics
Citations in the corpus
- Hubble Tension: The Evidence of New Physics (2023, methodology): “Also employing the H(z) data [499] and the GP method, Hu and Wang [507] reported a late-time transition of H0, i.”
- Cosmology Intertwined II: The Hubble Constant Tension (2020, unknown): “[27] H.”