Observational constraints on f(T) gravity from varying fundamental constants
| Autor: | Rafael C. Nunes, Alexander Bonilla, Supriya Pan, Emmanuel N. Saridakis |
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| Jazyk: | angličtina |
| Rok vydání: | 2017 |
| Předmět: | |
| Zdroj: | European Physical Journal C: Particles and Fields, Vol 77, Iss 4, Pp 1-9 (2017) |
| Druh dokumentu: | article |
| ISSN: | 1434-6044 1434-6052 |
| DOI: | 10.1140/epjc/s10052-017-4798-5 |
| Popis: | Abstract 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 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 $$\Lambda $$ Λ CDM cosmology through a sole parameter. Our analysis reveals that this parameter can be slightly different from its $$\Lambda $$ Λ CDM value, however, the best-fit value is very close to the $$\Lambda $$ Λ CDM one. Hence, f(T) gravity is consistent with observations, nevertheless, as every modified gravity, it may exhibit only small deviations from $$\Lambda $$ Λ CDM cosmology, a feature that must be taken into account in any f(T) model-building. |
| Databáze: | Directory of Open Access Journals |
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