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| Hlavní autoři: | , , , |
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| Médium: | Preprint |
| Vydáno: |
2024
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| Témata: | |
| On-line přístup: | https://arxiv.org/abs/2403.13708 |
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| _version_ | 1866910376056061952 |
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| author | Aguilar, Aram Escamilla-Rivera, Celia Said, Jackson Levi Mifsud, Jurgen |
| author_facet | Aguilar, Aram Escamilla-Rivera, Celia Said, Jackson Levi Mifsud, Jurgen |
| contents | There have been several works that have studied scalar cosmological perturbations in $f(T)$ teleparallel gravity theories to understand early cosmic times dynamics. In this direction, the perturbations presented have been performed by considering $f(T)$ extensions as an effective fluid-like scheme, where the equation-of-state contains extra terms due to the torsion. In this work, we discuss introducing a non-fluid-like approach as a direct consequence of $f(T)$ extensions, particularly for $f(T)$ power law model scenarios. This approach will be compared using CMB constraints data from Planck 2018 and SDSS catalogs, showing a change in about 17% in $C_{l}$ at $l< 10^{1}$ from the ones reported in the literature as a fluid-like approach, which will bring significant changes in the analysis on cosmological tensions at early cosmic times. |
| format | Preprint |
| id |
arxiv_https___arxiv_org_abs_2403_13708 |
| institution | arXiv |
| publishDate | 2024 |
| record_format | arxiv |
| spellingShingle | Non-fluid like Boltzmann code architecture for early times f(T) cosmologies Aguilar, Aram Escamilla-Rivera, Celia Said, Jackson Levi Mifsud, Jurgen General Relativity and Quantum Cosmology Cosmology and Nongalactic Astrophysics There have been several works that have studied scalar cosmological perturbations in $f(T)$ teleparallel gravity theories to understand early cosmic times dynamics. In this direction, the perturbations presented have been performed by considering $f(T)$ extensions as an effective fluid-like scheme, where the equation-of-state contains extra terms due to the torsion. In this work, we discuss introducing a non-fluid-like approach as a direct consequence of $f(T)$ extensions, particularly for $f(T)$ power law model scenarios. This approach will be compared using CMB constraints data from Planck 2018 and SDSS catalogs, showing a change in about 17% in $C_{l}$ at $l< 10^{1}$ from the ones reported in the literature as a fluid-like approach, which will bring significant changes in the analysis on cosmological tensions at early cosmic times. |
| title | Non-fluid like Boltzmann code architecture for early times f(T) cosmologies |
| topic | General Relativity and Quantum Cosmology Cosmology and Nongalactic Astrophysics |
| url | https://arxiv.org/abs/2403.13708 |