Updated constraints from the PLANCK experiment on modified gravity

TL;DR

This paper re-evaluates constraints on modified gravity models using recent Planck CMB data, combined with Hubble and baryon acoustic oscillation measurements, to understand their impact on cosmic structure growth.

Contribution

It provides updated upper limits on the length-scale parameter B0 in f(R) gravity models using the latest cosmological data sets.

Findings

Stronger constraints on B0 from Planck data.

Combined data tighten bounds on modified gravity parameters.

Implications for the viability of f(R) models in cosmology.

Abstract

A modification of the action of the general relativity produces a different pattern for the growth of the cosmic structures below a certain length-scale leaving an imprint on the cosmic microwave background (CMB) anisotropies. We re-examine the upper limits on the length-scale parameter B0 of f (R) models using the recent data from the Planck satellite experiment. We also investigate the combined constraints obtained when including the Hubble Space Telescope H0 measurement and the baryon acoustic oscillations measurements from the SDSS, WiggleZ and BOSS surveys.