Baryon acoustic oscillation, Hubble parameter, and angular size measurement constraints on the Hubble constant, dark energy dynamics, and spatial curvature

TL;DR

This study uses baryon acoustic oscillation, Hubble parameter, and quasar angular size data to constrain cosmological models, suggesting mild preference for closed spatial geometries and dynamic dark energy over a cosmological constant, with implications for the Hubble constant.

Contribution

It provides comprehensive constraints on six dark energy models using multiple observational data sets, exploring spatial curvature and dark energy dynamics.

Findings

Data mildly favor closed spatial hypersurfaces.

Evidence suggests dark energy may be dynamic rather than a cosmological constant.

Results indicate a lower Hubble constant than local measurements.

Abstract

In this paper we use all available baryon acoustic oscillation, Hubble parameter, and quasar angular size data to constrain six dark energy cosmological models, both spatially flat and non-flat. Depending on the model and data combination considered, these data mildly favor closed spatial hypersurfaces (by as much as $1.7\sigma$) and dark energy dynamics (up to a little over $2\sigma$) over a cosmological constant $\Lambda$. The data also favor, at $1.8\sigma$ to $3.4\sigma$, depending on the model and data combination, a lower Hubble constant than what is measured from the local expansion rate.