Exploring late-time cosmic acceleration: A study of a linear $f(T)$ cosmological model using observational data
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arXiv
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| Auteurs principaux: | , , , , |
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| Format: | Preprint |
| Publié: |
2024
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| _version_ | 1866910444130664448 |
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| author | Zhadyranova, A. Koussour, M. Bekkhozhayev, S. Zhumabekova, V. Rayimbaev, J. |
| author_facet | Zhadyranova, A. Koussour, M. Bekkhozhayev, S. Zhumabekova, V. Rayimbaev, J. |
| contents | Understanding the evolution of dark energy poses a significant challenge in modern cosmology, as it is responsible for the universe's accelerated expansion. In this study, we focus on a specific $f(T)$ cosmological model and analyze its behavior using observational data, including 31 data points from the CC dataset, 1048 points from the Pantheon SNe Ia samples, and 6 points from the BAO dataset. By considering a linear $f(T)$ model with an additional constant term, we derive the expression for the Hubble parameter as a function of cosmic redshift for non-relativistic pressureless matter. We obtain the best-fit values for the Hubble constant, $H_0$, and the model parameters $α$ and $β$, indicating a stable model capable of explaining late-time cosmic acceleration without invoking a dark energy component. This is achieved through modifying field equations to account for the observed accelerated expansion of the universe. |
| format | Preprint |
| id |
arxiv_https___arxiv_org_abs_2405_07357 |
| institution | arXiv |
| publishDate | 2024 |
| record_format | arxiv |
| spellingShingle | Exploring late-time cosmic acceleration: A study of a linear $f(T)$ cosmological model using observational data Zhadyranova, A. Koussour, M. Bekkhozhayev, S. Zhumabekova, V. Rayimbaev, J. Cosmology and Nongalactic Astrophysics Understanding the evolution of dark energy poses a significant challenge in modern cosmology, as it is responsible for the universe's accelerated expansion. In this study, we focus on a specific $f(T)$ cosmological model and analyze its behavior using observational data, including 31 data points from the CC dataset, 1048 points from the Pantheon SNe Ia samples, and 6 points from the BAO dataset. By considering a linear $f(T)$ model with an additional constant term, we derive the expression for the Hubble parameter as a function of cosmic redshift for non-relativistic pressureless matter. We obtain the best-fit values for the Hubble constant, $H_0$, and the model parameters $α$ and $β$, indicating a stable model capable of explaining late-time cosmic acceleration without invoking a dark energy component. This is achieved through modifying field equations to account for the observed accelerated expansion of the universe. |
| title | Exploring late-time cosmic acceleration: A study of a linear $f(T)$ cosmological model using observational data |
| topic | Cosmology and Nongalactic Astrophysics |
| url | https://arxiv.org/abs/2405.07357 |