Can $f(Q)$ gravity challenge $\Lambda$CDM?

Abstract

We study observational constraints on the non-metricity $f(Q)$-gravity which reproduces an exact $\Lambda$CDM background expansion history while modifying the evolution of linear perturbations. To this purpose we use Cosmic Microwave Background (CMB) radiation, baryonic acoustic oscillations (BAO), redshift-space distortions (RSD), supernovae type Ia (SNIa), galaxy clustering (GC) and weak gravitational lensing (WL) measurements. We set stringent constraints on the parameter of the model controlling the modifications to the gravitational interaction at linear perturbation level. We find the model to be statistically preferred by data over the $\Lambda$CDM according to the ${\chi }^2$ and deviance information criterion statistics for the combination with CMB, BAO, RSD and SNIa. This is mostly associated to a better fit to the low-$\ell$ tail of CMB temperature anisotropies.

5 pages, 1 figure, 2 tables, accepted for publication in PRD

References in corpus (11)

• The Clustering of the SDSS DR7 Main Galaxy Sample I: A 4 per cent Distance Measure at z=0.15
• The Large Scale Structure of f(R) Gravity
• Testing gravity with CAMB and CosmoMC
• Testing $F(Q)$ gravity with redshift space distortions
• Signatures of $f(Q)$-gravity in cosmology
• Bouncing Cosmology in f(Q) Symmetric Teleparallel Gravity
• N-body Simulations for f(R) Gravity using a Self-adaptive Particle-Mesh Code
• Observational constraints on cosmological solutions of $f(Q)$ theories
• Post-Newtonian limit of generalized symmetric teleparallel gravity
• MGCAMB with massive neutrinos and dynamical dark energy
• Comparison between different methods of model selection in cosmology

Cited by in corpus (1)

• Metric-Affine Myrzakulov Gravity Theories