Cosmological constraints from H ii starburst galaxy, quasar angular size, and other measurements. Issue 4 (15th November 2021)

• Record Type: Journal Article
• Authors: Cao, Shulei; Ryan, Joseph; Ratra, Bharat
• Is Part Of: Monthly notices of the Royal Astronomical Society. Volume 509:Issue 4(2022)
• Page Start: 4745
• Page End: 4757
• Publication Date: 2021-11-15
• Subjects: cosmological parameters -- dark energy -- cosmology: observations; Astronomy -- Periodicals; Periodicals; 520.5
• DOI: 10.1093/mnras/stab3304
• Languages: English
• ISSNs: 0035-8711

Abstract

ABSTRACT: We compare the constraints from two (2019 and 2021) compilations of H ii starburst galaxy (H ii G) data and test the model independence of quasar (QSO) angular size data using six spatially flat and non-flat cosmological models. We find that the new 2021 compilation of H ii G data generally provides tighter constraints and prefers lower values of cosmological parameters than those from the 2019 H ii G data. QSO data by themselves give relatively model-independent constraints on the characteristic linear size, l m, of the QSOs within the sample. We also use Hubble parameter [ H ( z )], baryon acoustic oscillation (BAO), Pantheon Type Ia supernova (SN Ia) apparent magnitude (SN-Pantheon), and DES-3 yr binned SN Ia apparent magnitude (SN-DES) measurements to perform joint analyses with H ii G and QSO angular size data, since their constraints are not mutually inconsistent within the six cosmological models we study. A joint analysis of H ( z ), BAO, SN-Pantheon, SN-DES, QSO, and the newest compilation of H ii G data provides almost model-independent summary estimates of the Hubble constant, $H_0=69.7\pm 1.2\ \rm {km\, s^{-1}\, Mpc^{-1}}$, the non-relativistic matter density parameter, $\Omega _{\rm m_0}=0.293\pm 0.021$, and l m = 10.93 ± 0.25 pc.