Measuring the Hubble constant and spatial curvature from supernova apparent magnitude, baryon acoustic oscillation, and Hubble parameter data

• Published in: Astrophysics and space science Vol. 364; no. 8; pp. 1 - 10
• Main Authors: Park, Chan-Gyung, Ratra, Bharat
• Format: Journal Article
• Language: English
• Published: Dordrecht Springer Netherlands 01.08.2019; Springer Nature B.V; Springer
• Subjects: Anisotropy; Astrobiology; Astronomical models; Astronomy; Astronomy & Astrophysics; Astrophysics; Astrophysics and Astroparticles; Baryons; Big Bang theory; Cosmic microwave background; Cosmology; Curvature; Dark energy; Evolution; Hubble constant; Hyperspaces; Inhomogeneity; Observations and Techniques; Original Article; Parameters; Physics; Physics and Astronomy; Space Exploration and Astronautics; Space Sciences (including Extraterrestrial Physics; Spatial data; Supernova; Cosmological parameters; Observations; Large-scale structure of universe; Methods: statistical
• ISSN: 0004-640X; 1572-946X
• DOI: 10.1007/s10509-019-3627-8

Cosmic microwave background (CMB) anisotropy (spatial inhomogeneity) data provide the tightest constraints on the Hubble constant, matter density, spatial curvature, and dark energy dynamics. Other data, sensitive to the evolution of only the spatially homogeneous part of the cosmological model, such as Type Ia supernova apparent magnitude, baryon acoustic oscillation distance, and Hubble parameter measurements, can be used in conjunction with the CMB data to more tightly constrain parameters. Recent joint analyses of CMB and such non-CMB data indicate that slightly closed spatial hypersurfaces are favored in nonflat untilted inflation models and that dark energy dynamics cannot be ruled out, and favor a smaller Hubble constant. We show that the constraints that follow from these non-CMB data alone are consistent with those that follow from the CMB data alone and so also consistent with, but weaker than, those that follow from the joint analyses of the CMB and non-CMB data.