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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| Format: | Article |
| Language: | English |
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MDPI AG
2024-02-01
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| Series: | Universe |
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| Online Access: | https://www.mdpi.com/2218-1997/10/2/83 |
| _version_ | 1797296888773345280 |
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| author | Vinícius Guilherme Oliveira Gil de Oliveira Neto Ilya L. Shapiro |
| author_facet | Vinícius Guilherme Oliveira Gil de Oliveira Neto Ilya L. Shapiro |
| author_sort | Vinícius Guilherme Oliveira |
| collection | DOAJ |
| description | 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. |
| first_indexed | 2024-03-07T22:11:19Z |
| format | Article |
| id | doaj.art-afbe0d5430f24bcd8d9e3322a934980a |
| institution | Directory Open Access Journal |
| issn | 2218-1997 |
| language | English |
| last_indexed | 2024-03-07T22:11:19Z |
| publishDate | 2024-02-01 |
| publisher | MDPI AG |
| record_format | Article |
| series | Universe |
| spelling | doaj.art-afbe0d5430f24bcd8d9e3322a934980a2024-02-23T15:36:48ZengMDPI AGUniverse2218-19972024-02-011028310.3390/universe10020083Kantowski–Sachs Model with a Running Cosmological Constant and RadiationVinícius Guilherme Oliveira0Gil de Oliveira Neto1Ilya L. Shapiro2Departamento de Física, Instituto de Ciências Exatas, Universidade Federal de Juiz de Fora, Juiz de Fora 36036-330, BrazilDepartamento de Física, Instituto de Ciências Exatas, Universidade Federal de Juiz de Fora, Juiz de Fora 36036-330, BrazilDepartamento de Física, Instituto de Ciências Exatas, Universidade Federal de Juiz de Fora, Juiz de Fora 36036-330, BrazilThe 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.https://www.mdpi.com/2218-1997/10/2/83early universeanisotropic modelsrunning cosmological constant |
| spellingShingle | Vinícius Guilherme Oliveira Gil de Oliveira Neto Ilya L. Shapiro Kantowski–Sachs Model with a Running Cosmological Constant and Radiation Universe early universe anisotropic models running cosmological constant |
| title | Kantowski–Sachs Model with a Running Cosmological Constant and Radiation |
| title_full | Kantowski–Sachs Model with a Running Cosmological Constant and Radiation |
| title_fullStr | Kantowski–Sachs Model with a Running Cosmological Constant and Radiation |
| title_full_unstemmed | Kantowski–Sachs Model with a Running Cosmological Constant and Radiation |
| title_short | Kantowski–Sachs Model with a Running Cosmological Constant and Radiation |
| title_sort | kantowski sachs model with a running cosmological constant and radiation |
| topic | early universe anisotropic models running cosmological constant |
| url | https://www.mdpi.com/2218-1997/10/2/83 |
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