Non-parametric reconstruction of the fine structure constant with galaxy clusters
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arXiv
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| Hauptverfasser: | , , , , |
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| Format: | Preprint |
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2024
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| _version_ | 1866929564212527104 |
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| author | Ferreira, Marcelo Holanda, Rodrigo F. L. Gonzalez, Javier E. Colaço, L. R. Nunes, Rafael C. |
| author_facet | Ferreira, Marcelo Holanda, Rodrigo F. L. Gonzalez, Javier E. Colaço, L. R. Nunes, Rafael C. |
| contents | Testing possible variations in fundamental constants of nature is a crucial endeavor in observational cosmology. This paper investigates potential cosmological variations in the fine structure constant ($α$) through a non-parametric approach, using galaxy cluster observations as the primary cosmological probe. We employ two methodologies based on galaxy cluster gas mass fraction measurements derived from X-ray and Sunyaev-Zeldovich observations, along with luminosity distances from type Ia supernovae. We also explore how different values of the Hubble constant ($H_0$) impact the variation of $α$ across cosmic history. When using the Planck satellite's $H_0$ observations, a constant $α$ is ruled out at approximately the 3$σ$ confidence level for $z \lesssim 0.5$. Conversely, employing local estimates of $H_0$ restores agreement with a constant $α$. |
| format | Preprint |
| id |
arxiv_https___arxiv_org_abs_2410_21542 |
| institution | arXiv |
| publishDate | 2024 |
| record_format | arxiv |
| spellingShingle | Non-parametric reconstruction of the fine structure constant with galaxy clusters Ferreira, Marcelo Holanda, Rodrigo F. L. Gonzalez, Javier E. Colaço, L. R. Nunes, Rafael C. Cosmology and Nongalactic Astrophysics Testing possible variations in fundamental constants of nature is a crucial endeavor in observational cosmology. This paper investigates potential cosmological variations in the fine structure constant ($α$) through a non-parametric approach, using galaxy cluster observations as the primary cosmological probe. We employ two methodologies based on galaxy cluster gas mass fraction measurements derived from X-ray and Sunyaev-Zeldovich observations, along with luminosity distances from type Ia supernovae. We also explore how different values of the Hubble constant ($H_0$) impact the variation of $α$ across cosmic history. When using the Planck satellite's $H_0$ observations, a constant $α$ is ruled out at approximately the 3$σ$ confidence level for $z \lesssim 0.5$. Conversely, employing local estimates of $H_0$ restores agreement with a constant $α$. |
| title | Non-parametric reconstruction of the fine structure constant with galaxy clusters |
| topic | Cosmology and Nongalactic Astrophysics |
| url | https://arxiv.org/abs/2410.21542 |