Cosmological dynamics and observational constraints: Parameter constraints

24 May 2024

This paper is available on arxiv under CC 4.0 license.

Authors:

(1) A. Oliveros, Programa de F´ısica, Universidad del Atl´antico;

(2) Mario A. Acero, Programa de F´ısica, Universidad del Atl´antico.

Table of Links

4. Parameter constraints

Table 2: Resulting 1σ allowed intervals for the fitted parameters from the MCMC analysis. The values for the ΛCDM model are from Planck 2018 [56].

Now, as one would expect, the constraints on the parameters is stronger

when the two datasets are combined in a joint analysis using

Figure 6: Evolution of the Hubble parameter (top) and the SN magnitude (bottom) with the redshift, z, as predicted for the f(Q) model presented in this work (dot-dashed blue), compared against observational data (black dots with the vertical lines indicating the uncertainty). The predicted evolution by the ΛCDM (full red and dashed gold) model is also shown for comparison, as detailed in the text.

Figure 7: Evolution of some cosmological parameters vs. the redshift, z, as predicted for the f(Q) model presented in this work, compared with the ΛCDM predictions (red-full line). In each panel, the dot-dashed orange, dotted violet and dashed green lines are the result of the parameter constraints from H(z), Pantheon and H(z)+ Pantheon samples, respectively.