Speaker
Description
Cosmological tensions have questioned the validity of the concordance model, opening avenues for new physics. One possible alternative is to model the cosmological expansion of the Universe using alternative gravitational models. In this talk, the scalar-tensor and teleparallel gravity paradigms are discussed within the context of large-scale structure formation and how the growth structure equations can be used to investigate the viability of such models using various observational data sets. The derived growth structure equations shall explore how it influences the growth index parameter, hence outlining the role of modified gravity theories on the s8 discrepancy. The talk will also discuss the behaviour of the subhorizon limit and how the chosen modified gravity model ansatzes influence the wavenumber when such limit is valid.
