Using Pantheon and DES supernova, baryon acoustic oscillation, and Hubble parameter data to constrain the Hubble constant, dark energy dynamics, and spatial curvature

Journal Article · 05 April 2021 · Monthly Notices of the Royal Astronomical Society

DOI: https://doi.org/10.1093/mnras/stab942 · OSTI ID:1806344

Cao, Shulei  ^[1]; Ryan, Joseph ^[1]; Ratra, Bharat ^[1]

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1. Kansas State Univ., Manhattan, KS (United States)

We use Pantheon Type Ia supernova (SN Ia) apparent magnitude, DES-3 yr binned SN Ia apparent magnitude, Hubble parameter, and baryon acoustic oscillation measurements to constrain six spatially flat and non-flat cosmological models. These sets of data provide mutually consistent cosmological constraints in the six cosmological models we study. A joint analysis of these data sets provides model-independent estimates of the Hubble constant, $$H_0=68.8\pm 1.8\ \rm {km \, s^{-1} \ Mpc^{-1}}$$, and the non-relativistic matter density parameter, $$\Omega _{\rm m_0}=0.294\pm 0.020$$. Although the joint constraints prefer mild dark energy dynamics and a little spatial curvature, they do not rule out dark energy being a cosmological constant and flat spatial hypersurfaces. Here, we also add quasar angular size and Hii starburst galaxy measurements to the combined data set and find more restrictive constraints.

• Research Organization: Kansas State Univ., Manhattan, KS (United States)
• Sponsoring Organization: USDOE Office of Science (SC); USDOE
• Grant/Contract Number: SC0011840
• OSTI ID: 1806344
• Alternate ID(s): OSTI ID: 1851558
• Journal Information: Monthly Notices of the Royal Astronomical Society, Vol. 504, Issue 1; ISSN 0035-8711
• Publisher: Oxford University PressCopyright Statement
• Country of Publication: United States
• Language: English