2016/08/31 by Rafael C. Nunes, Alexander Bonilla, Supriya Pan +1
Physics and Astronomy · #Astrophysics #Black Holes and Theoretical Physics #Computer science #Constant (computer programming) #Cosmological constant #Cosmology #Cosmology and Gravitation Theories #Dark energy #Galaxies: Formation, Evolution, Phenomena #Hubble's law #Lambda #Order (exchange) #Physics #Quantum mechanics #Theoretical physics #astro-ph.CO #gr-qc #hep-th
paper · pdf · doi:10.1140/epjc/s10052-017-4798-5
published as Eur.Phys.J. C77 (2017) 230 · 9 pages, 6 figures, 3 Tables, version published in Eur.Phys.J. C
openalex created_date 2016/08/23 · openalex publication_date 2017/04/01 · arxiv created 2017/04/17 · arxiv updated 2017/04/18 · openalex updated_date 2026/08/05
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 Λ CDM cosmology through a sole parameter. Our analysis reveals that this parameter can be slightly different from its Λ CDM value, however, the best-fit value is very close to the Λ CDM one. Hence, f(T) gravity is consistent with observations, nevertheless, as every modified gravity, it may exhibit only small deviations from Λ CDM cosmology, a feature that must be taken into account in any f(T) model-building.