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| Format: | Artículo científico |
| Language: | en |
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Sociedade Brasileira de Física
2003
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| Online Access: | https://www.redalyc.org/articulo.oa?id=46413573039 |
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| _version_ | 1866815544470011904 |
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| author | Júlio César Fabris |
| author_facet | Júlio César Fabris |
| contents | Evolution of Perturbations in a Domain Wall Cosmology Júlio César Fabris Sérgio Vitorino de Borba Gonçalves Física, Astronomía y Matemáticas A fluid of domain walls may have an effective equation of state pw = ¡2 3 ½w. This equation of state is qualitatively in agreement with the supernova type Ia observations. We exploit a cosmological model where the matter content is given by a dust fluid and a domain wall fluid. The process of formation of galaxies is essentially preserved. On the other hand, the behaviour of the density contrast in the ordinary fluid is highly altered when domain walls begin to dominate the matter content of the Universe. This domain wall phase occurs at relative recent era, and its possible consequences are discussed, specially concerning the Sachs-Wolfe effect. 2003 artículo científico 0103-9733 https://www.redalyc.org/articulo.oa?id=46413573039 en http://www.redalyc.org/revista.oa?id=464 Brazilian Journal of Physics application/pdf Sociedade Brasileira de Física Brazilian Journal of Physics (Brasil) Num.4 Vol.33 |
| format | Artículo científico |
| id | redalyc_46413573039 |
| language | en |
| publishDate | 2003 |
| publisher | Sociedade Brasileira de Física |
| spellingShingle | Evolution of Perturbations in a Domain Wall Cosmology Júlio César Fabris Física, Astronomía y Matemáticas Evolution of Perturbations in a Domain Wall Cosmology Júlio César Fabris Sérgio Vitorino de Borba Gonçalves Física, Astronomía y Matemáticas A fluid of domain walls may have an effective equation of state pw = ¡2 3 ½w. This equation of state is qualitatively in agreement with the supernova type Ia observations. We exploit a cosmological model where the matter content is given by a dust fluid and a domain wall fluid. The process of formation of galaxies is essentially preserved. On the other hand, the behaviour of the density contrast in the ordinary fluid is highly altered when domain walls begin to dominate the matter content of the Universe. This domain wall phase occurs at relative recent era, and its possible consequences are discussed, specially concerning the Sachs-Wolfe effect. 2003 artículo científico 0103-9733 https://www.redalyc.org/articulo.oa?id=46413573039 en http://www.redalyc.org/revista.oa?id=464 Brazilian Journal of Physics application/pdf Sociedade Brasileira de Física Brazilian Journal of Physics (Brasil) Num.4 Vol.33 |
| title | Evolution of Perturbations in a Domain Wall Cosmology |
| topic | Física, Astronomía y Matemáticas |
| url | https://www.redalyc.org/articulo.oa?id=46413573039 |