Observational constraints of f(Q) gravity

By Ruth Lazkoz, Francisco S. N. Lobo, Mar'ia Ortiz-Banos, Vincenzo Salzano. Physical Review D, 2019

177 citations recorded by the source corpus.

In this work, we consider an extension of symmetric teleparallel gravity, namely, f(Q) gravity, where the fundamental block to describe spacetime is the nonmetricity, Q. Within this formulation of gravitation, we perform an observational analysis of several modified f(Q) models using the redshift approach, where the f(Q) Lagrangian is reformulated as an explicit function of the redshift, f(z). Various different polynomial parametrizations of f(z) are proposed, including new terms which would allow for deviations from the Λ Cold Dark Matter model. Given a variety of observational probes, such as the expansion rate data from early type galaxies, type Ia supernovae, quasars, gamma ray bursts, baryon acoustic oscillations data, and cosmic microwave background distance priors, we have checked the validity of these models at the background level in order to verify if this new formalism provides us with plausible alternative models to explain the late time acceleration of the Universe. Indeed, this novel approach provides a different perspective on the formulation of observationally reliable alternative models of gravity.

Subfields: Astronomy and Astrophysics, Nuclear and High Energy Physics, Oceanography

View Paper: https://www.semanticscholar.org/paper/e411d885be466b1953cc3efb6c24b1295dbee03a

How researchers see this paper

The researchers whose trusted networks rank it highest, strongest advocate first. Every researcher gets a different order.

In Astronomy and Astrophysics

In Nuclear and High Energy Physics

In Oceanography

Citations in the corpus

Cosmological solutions and growth index of matter perturbations in f(Q) gravity (2021, methodology): “We remark here that for n = 0, the model reduces to the standard ΛCDM model with the quantity α2 playing the role of the cosmological constant [14, 58].”
Modified Gravity and Cosmology (2021, methodology): “[26], we can have an alternative formulation of the Einstein-Hilbert action, namely”