Is the $w_0{w}_a$CDM cosmological parameterization evidence for dark energy dynamics partially caused by the excess smoothing of Planck PR4 CMB anisotropy data?

Javier de Cruz Pérez, Chan-Gyung Park, Bharat Ratra

We study the performance of the flat $\Lambda$CDM model and the dynamical dark energy parameterizations $w_0$CDM and $w_0{w}_a$CDM, in which the dark energy (DE) equation of state is eithe…