Using non-DESI data to confirm and strengthen the DESI 2024 spatially-flat w₀wₐCDM cosmological parameterization result

We use a combination of Planck cosmic microwave background (CMB) anisotropy data and non-CMB data that include Pantheon+ type Ia supernovae, Hubble parameter H (z), growth factor (f₈) measurements, and a collection of baryon acoustic oscillation (BAO) data, but not recent DESI 2024 BAO measurements, to confirm the DESI 2024 (DESI+CMB+PantheonPlus) data compilation support for dynamical dark energy with an evolving equation of state parameter w (z) = w₀ + wₐ z/ (1+z). From our joint compilation of CMB and non-CMB data, in a spatially-flat cosmological model, we obtain w₀ = -0. 850 0. 059 and wₐ = -0. 59^+0. 26-₀. ₂₂ and find that this dynamical dark energy is favored over a cosmological constant by 2. Our data constraints on the flat w₀wₐCDM model are slightly more restrictive than the DESI 2024 constraints, with the DESI 2024 and our values of w₀ and wₐ differing by -0. 27 and 0. 44, respectively. Our data compilation slightly more strongly favors the flat w₀wₐCDM model over the flat CDM model than does the DESI 2024 data compilation.