English

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

Cosmology and Nongalactic Astrophysics 2019-09-10 v2 General Relativity and Quantum Cosmology High Energy Physics - Phenomenology High Energy Physics - Theory

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 1.7σ1.7\sigma) and dark energy dynamics (up to a little over 2σ2\sigma) over a cosmological constant Λ\Lambda. The data also favor, at 1.8σ1.8\sigma to 3.4σ3.4\sigma, depending on the model and data combination, a lower Hubble constant than what is measured from the local expansion rate.

Keywords

Cite

@article{arxiv.1902.03196,
  title  = {Baryon acoustic oscillation, Hubble parameter, and angular size measurement constraints on the Hubble constant, dark energy dynamics, and spatial curvature},
  author = {Joseph Ryan and Yun Chen and Bharat Ratra},
  journal= {arXiv preprint arXiv:1902.03196},
  year   = {2019}
}

Comments

13 pages, 6 figures. This version has been updated to reflect referee comments, and to correct a mistake that was present in an earlier version (results largely unchanged). Accepted for publication in MNRAS