Structure formation in f(T) gravity and a solution for H0 tension

By Rafael C. Nunes. 2018

174 citations recorded by the source corpus.

We investigate the evolution of scalar perturbations in f(T) teleparallel gravity and its effects on the cosmic microwave background (CMB) anisotropy. The f(T) gravity generalizes the teleparallel gravity which is formulated on the Weitzenböck spacetime, characterized by the vanishing curvature tensor (absolute parallelism) and the non-vanishing torsion tensor. For the first time, we derive the observational constraints on the modified teleparallel gravity using the CMB temperature power spectrum from Planck's estimation, in addition to data from baryonic acoustic oscillations (BAO) and local Hubble constant measurements. We find that a small deviation of the f(T) gravity model from the ΛCDM cosmology is slightly favored. Besides that, the f(T) gravity model does not show tension on the Hubble constant that prevails in the ΛCDM cosmology. It is clear that f(T) gravity is also consistent with the CMB observations, and undoubtedly it can serve as a viable candidate amongst other modified gravity theories.

Subfields: Astronomy and Astrophysics, Atomic and Molecular Physics, and Optics, Statistical and Nonlinear Physics

View Paper: https://www.semanticscholar.org/paper/d1ad8f4b254c420b7b0ca9ba71bc5c442a274ba4

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Citations in the corpus

Cosmology Intertwined II: The Hubble Constant Tension (2020, unknown): “[68] R.”
On the Hubble Constant Tension in the SNe Ia Pantheon Sample (2021, methodology): “A probable scenario entails the use of teleparallel equivalent general relativity (Nunes et al. 2016; Nunes 2018; Benetti et al. 2021), where the torsion tensor assumes a key role, while another possible explanation relies on modified theories of gravity, thus requiring the use of a function of the…”
Cosmological perturbations in modified teleparallel gravity models (2018, methodology): “ombining (8) and (11) we can see that the Poisson equation, which is well known is GR, holds also exactly for linear perturbations in f(T) gravity: △ψ= 4πGa2ρδ.ˆ (18) It has been had noted previously [34, 22] that the equation is valid for Newtonian gauge perturbations at the small scale limit, whic”
Interacting dark energy in the early 2020s: A promising solution to the H0 and cosmic shear tensions (2019, unknown): “[10–109].”
Implications of an extended dark energy cosmology with massive neutrinos for cosmological tensions (2018, background): “f(R) gravity [67], tele-parallel” f(T ) gravity [68] or Galileon gravity [69, 70]) or nonlocal gravity ([71]).”