A Whole Cosmology View of the Hubble Constant

2023/01/23 by Eric V. Linder, Linder, Eric V.
Physics and Astronomy · #Advanced Mathematical Theories and Applications #Cosmology and Gravitation Theories #Cosmology and Nongalactic Astrophysics (astro-ph.CO) #FOS: Physical sciences #Relativity and Gravitational Theory

paper · pdf · doi:10.48550/arxiv.2301.09695

openalex publication_date 2023/01/23 · openalex created_date 2025/10/10 · openalex updated_date 2026/07/28

Abstract

The Hubble constant H₀ is the value of the cosmic expansion rate at one time (the present), and cannot be adjusted successfully without taking into account the entire expansion history and cosmology. We outline some conditions, that if not quite ``no go'' are ``no thanks'', showing that changing the expansion history, e.g. employing dynamical dark energy, cannot reconcile disparate deductions of H₀ without upsetting some other cosmological measurement.

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