The H ₀ Tension in Non-flat QCDM Cosmology

Abstract

The recent local measurement of the Hubble constant leads to a more than 3σ tension with Planck + ΛCDM. In this article we study the H ₀ tension in non-flat QCDM cosmology, where Q stands for a minimally coupled and slowly or moderately rolling quintessence field ϕ with a smooth potential V(φ ), and CDM refers to cold dark matter. By generalizing the QCDM one-parameter and three-parameter parameterizations in Huang et al. to a non-flat universe and using the latest cosmological data, we find that the H ₀ tension remains above the 3.2σ level for this class of model.