Can Stiff Matter Solve the Hubble Tension?

Can Stiff Matter Solve the Hubble Tension?

A new form of the mathematical expression for the co-moving volume element of a flat universe with cosmological constant, cold matter, and stiff matter is presented. It is used to determine the constraints from the Planck measurements of the Hubble parameter on the amount of stiff matter in the univ...

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Veröffentlicht in:Axioms 2024-08, Vol.13 (8), p.526
1. Verfasser: Grøn, Øyvind G.
Format: Artikel
Sprache:eng
Schlagworte:
Astronomical research
co-moving volume element
Constraints
Cosmological constant
cosmology
Dark energy
Density
Dust
Hubble parameter
Hubble tension
Mathematical research
Parameters
Planck measurements
Present value
Radiation
stiff matter
Universe
Upper bounds
Viscosity
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Beschreibung
Zusammenfassung:A new form of the mathematical expression for the co-moving volume element of a flat universe with cosmological constant, cold matter, and stiff matter is presented. It is used to determine the constraints from the Planck measurements of the Hubble parameter on the amount of stiff matter in the universe. These constraints are used to investigate whether the presence of stiff matter can solve the Hubble tension. It is found that the Planck measurements lead to an upper bound on the present value of the density parameter of stiff matter ΩS0
ISSN:2075-1680
2075-1680
DOI:10.3390/axioms13080526