Paper detail

Exploring the effects of a double reconstruction on the geometrical parameters of coupled models, using observational data

In this work we study the effects of the non-gravitational exchange energy (Q) between dark matter (DM) fluid and dark energy (DE) fluid on the background evolution of the cosmological parameters. A varying equation of state (EOS) parameter, ω, for DE is proposed. Considering an universe spatially flat, two distinct coupled models were examined to explore the main cosmological effects generated by the simultaneous reconstruction of Q and ω on the shape of the jerk parameter, j, through a slight enhancement or suppression of their amplitudes with respect to noncoupled scenarios, during its evolution from the past to the near future. In consequence, j could be used to distinguish any coupled DE models. Otherwise, the observational data were used to put stringent constraints on Q and ω, respectively. In such a way, we used our results as evidences to search possible deviations from the standard concordance model (ΛCDM), examining their predictions and improving our knowledge of the cosmic evolution of the universe.