Studies On Dark Energy Evolution

Abstract In this work we explore signatures of evolution for the dark energy density X ( z ) = ρ de ( z )/ ρ de (0) using latest observations on SNIa and H ( z ). The models consist of parametrizations of the dark energy density and consequently a reconstruction for the EoS parameter w ( z ) as a function of redshift. Both parametrization methods using the SH0Es prior results in a small deviation from LCDM at 1 σ for X ( z ). Extending the analysis up to 2 σ , the evidence for evolution of X ( z ) dilute in both cases. We have also studied an interacting dark model where this trend is also found.