Cosmological constraints from higher redshift gamma-ray burst, H ii starburst galaxy, and quasar (and other) data. Issue 1 (3rd December 2020)

• Record Type: Journal Article
• Authors: Cao, Shulei; Ryan, Joseph; Khadka, Narayan; Ratra, Bharat
• Is Part Of: Monthly notices of the Royal Astronomical Society. Volume 501:Issue 1(2021)
• Page Start: 1520
• Page End: 1538
• Publication Date: 2020-12-03
• Subjects: cosmological parameters -- dark energy -- cosmology: observations; Astronomy -- Periodicals; Periodicals; 520.5
• DOI: 10.1093/mnras/staa3748
• Languages: English
• ISSNs: 0035-8711

Abstract

ABSTRACT: We use higher redshift gamma-ray burst (GRB), H ii starburst galaxy (H ii G), and quasar angular size (QSO-AS) measurements to constrain six spatially flat and non-flat cosmological models. These three sets of cosmological constraints are mutually consistent. Cosmological constraints from a joint analysis of these data sets are largely consistent with currently accelerating cosmological expansion and with cosmological constraints derived from a combined analysis of Hubble parameter ( H ( z )) and baryon acoustic oscillation (BAO, with Planck -determined baryonic matter density) measurements. A joint analysis of the H ( z ) + BAO + QSO-AS + H ii G + GRB data provides fairly model-independent determinations of the non-relativistic matter density parameter $\Omega _{\rm m_0}=0.313\pm 0.013$ and the Hubble constant $H_0=69.3\pm 1.2\, \rm {km \, s^{-1} \, Mpc^{-1}}$ . These data are consistent with the dark energy being a cosmological constant and with spatial hypersurfaces being flat, but they do not rule out mild dark energy dynamics or a little spatial curvature. We also investigate the effect of including quasar flux measurements in the mix and find no novel conclusions.