A cosmological model with logarithmic f(T) gravity and H(z) quadratic expansion
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arXiv
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| Format: | Preprint |
| Publié: |
2025
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| _version_ | 1866912668936306688 |
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| author | Aquino, Adriel O. Silva, Euclides G. |
| author_facet | Aquino, Adriel O. Silva, Euclides G. |
| contents | We study the late-time cosmological expansion of a modified teleparallel gravity model of type logarithmic type. This modified gravitational lagrangian yields a cosmological constant term and also power-law corrections to the teleparallel equivalent of general relativity (TEGR) for small $λ$. By using the cosmological chronometers and the type Ia supernove data from the Pantheon+SH0ES dataset, we fit the parameters of the modified gravitational dynamics assuming $H(z)$ parametrized by a quadratic expansion. The results exhibit an accelerated expansion with parameter $q = - 0.435 \pm 0.028$. In addition, we analyzed the effective energy density, pressure and state parameter $ω$. It turns out that, this modified gravitational theory produces solutions similar to the quintessence and phantom models. |
| format | Preprint |
| id |
arxiv_https___arxiv_org_abs_2510_21466 |
| institution | arXiv |
| publishDate | 2025 |
| record_format | arxiv |
| spellingShingle | A cosmological model with logarithmic f(T) gravity and H(z) quadratic expansion Aquino, Adriel O. Silva, Euclides G. General Relativity and Quantum Cosmology Cosmology and Nongalactic Astrophysics We study the late-time cosmological expansion of a modified teleparallel gravity model of type logarithmic type. This modified gravitational lagrangian yields a cosmological constant term and also power-law corrections to the teleparallel equivalent of general relativity (TEGR) for small $λ$. By using the cosmological chronometers and the type Ia supernove data from the Pantheon+SH0ES dataset, we fit the parameters of the modified gravitational dynamics assuming $H(z)$ parametrized by a quadratic expansion. The results exhibit an accelerated expansion with parameter $q = - 0.435 \pm 0.028$. In addition, we analyzed the effective energy density, pressure and state parameter $ω$. It turns out that, this modified gravitational theory produces solutions similar to the quintessence and phantom models. |
| title | A cosmological model with logarithmic f(T) gravity and H(z) quadratic expansion |
| topic | General Relativity and Quantum Cosmology Cosmology and Nongalactic Astrophysics |
| url | https://arxiv.org/abs/2510.21466 |