Hubble Tension: The Evidence of New Physics

The ΛCDM model provides a good fit to most astronomical observations but harbors large areas of phenomenology and ignorance. With the improvements in the precision and number of observations, discrepancies between key cosmological parameters of this model have emerged. Among them, the most notable t...

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Bibliographic Details
Published inUniverse (Basel) Vol. 9; no. 2; p. 94
Main Authors Hu, Jian-Ping, Wang, Fa-Yin
Format Journal Article
LanguageEnglish
Published Basel MDPI AG 01.02.2023
Subjects
Astronomical research
Big Bang theory
Cosmic background radiation
cosmological parameters
cosmology
Hubble constant
Physics
Space telescopes
Tension
Universe
China
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Summary:The ΛCDM model provides a good fit to most astronomical observations but harbors large areas of phenomenology and ignorance. With the improvements in the precision and number of observations, discrepancies between key cosmological parameters of this model have emerged. Among them, the most notable tension is the 4σ to 6σ deviation between the Hubble constant (H0) estimations measured by the local distance ladder and the cosmic microwave background (CMB) measurement. In this review, we revisit the H0 tension based on the latest research and sort out evidence from solutions to this tension that might imply new physics beyond the ΛCDM model. The evidence leans more towards modifying the late-time universe.
ISSN:2218-1997
2218-1997
DOI:10.3390/universe9020094