Constraints on dark energy dynamics and spatial curvature from Hubble parameter and baryon acoustic oscillation data

TL;DR

This study uses baryon acoustic oscillation and Hubble parameter data to constrain dark energy properties and spatial curvature, finding that the flat Lambda-CDM model fits well but allowing for mild deviations.

Contribution

It provides updated constraints on dark energy dynamics and spatial curvature using comprehensive BAO and Hubble data, exploring model dependencies.

Findings

Flat Lambda-CDM fits data well

Mild dark energy dynamics are slightly favored

Non-flat models are within 1σ of best fit

Abstract

We use all available baryon acoustic oscillation distance measurements and Hubble parameter data to constrain the cosmological constant $\Lambda$, dynamical dark energy, and spatial curvature in simple cosmological models. We find that the consensus spatially flat $\Lambda$CDM model provides a reasonable fit to the data, but depending on the Hubble constant prior and cosmological model, it can be a little more than 1$\sigma$ away from the best-fit model, which can favor mild dark energy dynamics or non-flat spatial hypersurfaces.