Is there a dynamical tendency in H0 with late time measurements?
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arXiv
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| Autori principali: | , |
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| Natura: | Preprint |
| Pubblicazione: |
2024
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| _version_ | 1866912275969867776 |
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| author | Lopez-Hernandez, Mauricio De-Santiago, Josue |
| author_facet | Lopez-Hernandez, Mauricio De-Santiago, Josue |
| contents | The discrepancy between the Hubble constant $H_0$ values derived from early-time and late-time measurements, reaching up to $4σ$, 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 $1.5σ$ and $2.3σ$, 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. |
| format | Preprint |
| id |
arxiv_https___arxiv_org_abs_2411_00095 |
| institution | arXiv |
| publishDate | 2024 |
| record_format | arxiv |
| spellingShingle | Is there a dynamical tendency in H0 with late time measurements? Lopez-Hernandez, Mauricio De-Santiago, Josue Cosmology and Nongalactic Astrophysics General Relativity and Quantum Cosmology The discrepancy between the Hubble constant $H_0$ values derived from early-time and late-time measurements, reaching up to $4σ$, 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 $1.5σ$ and $2.3σ$, 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. |
| title | Is there a dynamical tendency in H0 with late time measurements? |
| topic | Cosmology and Nongalactic Astrophysics General Relativity and Quantum Cosmology |
| url | https://arxiv.org/abs/2411.00095 |