Observational Constraints on $f(T)$ gravity from varying fundamental constants
| Autor: | Supriya Pan, Alexander Bonilla, Rafael C. Nunes, Emmanuel N. Saridakis |
|---|---|
| Jazyk: | angličtina |
| Rok vydání: | 2016 |
| Předmět: |
High Energy Physics - Theory
Gravity (chemistry) Cosmology and Nongalactic Astrophysics (astro-ph.CO) Physics and Astronomy (miscellaneous) Value (computer science) FOS: Physical sciences lcsh:Astrophysics Tetrad Field General Relativity and Quantum Cosmology (gr-qc) Astrophysics::Cosmology and Extragalactic Astrophysics Lambda 01 natural sciences Cosmology General Relativity and Quantum Cosmology symbols.namesake Baryonic Acoustic Oscillation lcsh:QB460-466 0103 physical sciences lcsh:Nuclear and particle physics. Atomic energy. Radioactivity 010303 astronomy & astrophysics Engineering (miscellaneous) Fundamental Constant Torsion Scalar Mathematical physics Physics 010308 nuclear & particles physics Order (ring theory) Supernova High Energy Physics - Theory (hep-th) Einstein Frame symbols lcsh:QC770-798 Constant (mathematics) Hubble's law Astrophysics - Cosmology and Nongalactic Astrophysics |
| Zdroj: | European Physical Journal C: Particles and Fields, Vol 77, Iss 4, Pp 1-9 (2017) European Physical Journal C |
| Popis: | We use observations related to the variation of fundamental constants, in order to impose constraints on the viable and most used $f(T)$ gravity models. In particular, for the fine-structure constant we use direct measurements obtained by different spectrographic methods, while for the effective Newton's constant we use a model-dependent reconstruction, using direct observational Hubble parameter data, in order to investigate its temporal evolution. We consider two $f(T)$ models and we quantify their deviation from $\Lambda$CDM cosmology through a sole parameter. Our analysis reveals that this parameter can be slightly different from its $\Lambda$CDM value, however the best-fit value is very close to the $\Lambda$CDM one. Hence, $f(T)$ gravity is consistent with observations, nevertheless, as every modified gravity, it may exhibit only small deviations from $\Lambda$CDM cosmology, a feature that must be taken into account in any $f(T)$ model-building. Comment: 9 pages, 6 figures, 3 Tables, version published in Eur.Phys.J. C |
| Databáze: | OpenAIRE |
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