12–16 Jun 2023
Asia/Yerevan timezone

Hubble Tension challenge in the modern cosmology: possible solutions

13 Jun 2023, 15:30
30m

Speaker

Gennady Bisnovatyi-Kogan (Space Research Institute Rus. Acad. Sci., Moscow, Russia)

Description

One of the problems in the modern cosmology is a so-called Hubble tension (HT), which is the difference between values of the present Hubble constant H0, measured by observation of the universe at redshift z ≤1, and the same value measured by observations of a distant universe by observations of CMB fluctuations corresponding to z ≌1100. We suggest that this Tension may be explained by deviation of the cosmological expansion from a standard 𝜦CDM model of a flat universe, due to the action of an additional variable component DEV during the post-recombination stage.
In order to maintain the almost constant DEV/DM energy density ratio during the whole time interval at $z < 1100$, it is necessary to allow the existence of a wide mass DM particle distribution.

Primary author

Gennady Bisnovatyi-Kogan (Space Research Institute Rus. Acad. Sci., Moscow, Russia)

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