Kantowski–Sachs Model with a Running Cosmological Constant and Radiation

The simplest anisotropic model of the early universe is the one with two conformal factors, which can be identified as the Kantowski–Sachs metric, or the reduced version of the Bianchi-I metric. To fit the existing observational data, it is important that the anisotropy is washed out in the early st...

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Bibliographic Details
Main Authors: Vinícius Guilherme Oliveira, Gil de Oliveira Neto, Ilya L. Shapiro
Format: Article
Language:English
Published: MDPI AG 2024-02-01
Series:Universe
Subjects:
Online Access:https://www.mdpi.com/2218-1997/10/2/83
Description
Summary:The simplest anisotropic model of the early universe is the one with two conformal factors, which can be identified as the Kantowski–Sachs metric, or the reduced version of the Bianchi-I metric. To fit the existing observational data, it is important that the anisotropy is washed out in the early stage of the evolution. We explore the possible effects of the running cosmological constant on the dynamics of isotropy in the case of space filled by radiation.
ISSN:2218-1997