Is there a dynamical tendency in H0 with late time measurements?
Abstract
The discrepancy between the Hubble constant $H_0$ values derived from early-time and late-time measurements, reaching up to $4\sigma$, represents the most serious challenge in modern cosmology and astrophysics. In this work, we investigate if a similar tension exists between only late time measurements at different redshifts. We use the latest public datasets including Cosmic Chronometers, Megamasers, SNe Ia and DESI-BAO, that span from redshift $z \sim 0$ up to $z\sim 2.3$. By dividing the data into redshift bins, we derive $H_0$ values from each bin separately. Our analysis reveals a phenomenological dynamic evolution in $H_0$ across different redshift ranges, with a significance from $1.5\sigma$ and $2.3\sigma$, depending on the parameterization. Consistency of the model demands observational constancy of $H_0$ since it is an integration constant within the Friedmann-Lemaître-Robertson-Walker (FLRW) metric. Thus, these findings suggest that the observed Hubble tension might not only exist between early and late-time measurements but also among late-time data themselves, providing new insights into the nature of the Hubble tension.
- Publication:
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arXiv e-prints
- Pub Date:
- October 2024
- DOI:
- arXiv:
- arXiv:2411.00095
- Bibcode:
- 2024arXiv241100095L
- Keywords:
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- Astrophysics - Cosmology and Nongalactic Astrophysics;
- General Relativity and Quantum Cosmology
- E-Print:
- 16 pages, 4 figures