http://arxiv.org/abs/2211.17194
The cosmographic technique is a powerful model-independent tool for distinguishing between competing cosmological scenarios. The key strengths and weaknesses of standard cosmography are discussed in view of healing the convergence problem endangering the high-redshift expansions of cosmological distances. We focus especially on rational cosmographic approximations to reconstruct the dark energy behaviour under the $f(R)$, $f(T)$ and $f(Q)$ gravity frameworks. Based on observational constraints over the cosmographic series, we investigate the origin of cosmic acceleration and the possibility of going beyond the standard cosmological model to explain the dark energy problem.
S. Capozziello and R. D’Agostino
Thu, 1 Dec 22
20/85
Comments: 16 pages, 5 figures. Proceeding of XVIII Vulcano Workshop on Frontier Objects in Astrophysics and Particle Physics, to appear in Frascati Physics Series 2023