Studies on dark energy evolution

Understand

In this work we explore signatures of evolution for the dark energy density $X(z)=\rho_{de}(z)/\rho_{de}(0)$ 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$\sigma$ for $X(z)$.
• Extending the analysis up to 2$\sigma$, the evidence for evolution of $X(z)$ dilute in both cases.