# 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.

## Key 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.

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Source: https://tomesphere.com/paper/1902.03196