Dark Energy and Some Alternatives: a Brief Overview
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| Format: | Artículo científico |
| Language: | en |
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Sociedade Brasileira de Física
2006
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| _version_ | 1876490446357659648 |
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| author | J. S. Alcaniz |
| author_facet | J. S. Alcaniz |
| contents | Dark Energy and Some Alternatives: a Brief Overview J. S. Alcaniz Física, Astronomía y Matemáticas Dark energy Extra dimensions Cosmological constant The high-quality cosmological data, which became available in the last decade, have thrusted upon us arather preposterous composition for the universe which poses one of the greatest challenges theoretical physicshas ever faced: the so-called dark energy. By focusing our attention on specific examples of dark energyscenarios, we discuss three different candidates for this dark component, namely, a decaying vacuum energyor time-varying cosmological constant [Λ(t)], a rolling homogeneous quintessence field (Φ), and modificationsin gravity due to extra spatial dimensions. As discussed, all these candidates [along with the vacuum energyor cosmological constant (Λ)] seem somewhat to be able to explain the current observational results, whichhampers any definitive conclusion on the actual nature of the dark energy. 2006 artículo científico 0103-9733 https://www.redalyc.org/articulo.oa?id=46436602 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.4A Vol.36 |
| format | Artículo científico |
| id | redalyc_46436602 |
| institution | Redalyc |
| language | en |
| publishDate | 2006 |
| publisher | Sociedade Brasileira de Física |
| spellingShingle | Dark Energy and Some Alternatives: a Brief Overview J. S. Alcaniz Física, Astronomía y Matemáticas Dark energy Extra dimensions Cosmological constant Dark Energy and Some Alternatives: a Brief Overview J. S. Alcaniz Física, Astronomía y Matemáticas Dark energy Extra dimensions Cosmological constant The high-quality cosmological data, which became available in the last decade, have thrusted upon us arather preposterous composition for the universe which poses one of the greatest challenges theoretical physicshas ever faced: the so-called dark energy. By focusing our attention on specific examples of dark energyscenarios, we discuss three different candidates for this dark component, namely, a decaying vacuum energyor time-varying cosmological constant [Λ(t)], a rolling homogeneous quintessence field (Φ), and modificationsin gravity due to extra spatial dimensions. As discussed, all these candidates [along with the vacuum energyor cosmological constant (Λ)] seem somewhat to be able to explain the current observational results, whichhampers any definitive conclusion on the actual nature of the dark energy. 2006 artículo científico 0103-9733 https://www.redalyc.org/articulo.oa?id=46436602 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.4A Vol.36 |
| title | Dark Energy and Some Alternatives: a Brief Overview |
| topic | Física, Astronomía y Matemáticas Dark energy Extra dimensions Cosmological constant |
| url | https://www.redalyc.org/articulo.oa?id=46436602 |