Alternative Dark Energy Models: An Overview
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| Format: | Artículo científico |
| Langue: | en |
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Sociedade Brasileira de Física
2004
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| _version_ | 1876423087982903296 |
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| author | J. A. S. Lima |
| author_facet | J. A. S. Lima |
| contents | Alternative Dark Energy Models: An Overview J. A. S. Lima Física, Astronomía y Matemáticas A large number of recent observational data strongly suggest that we live in a flat, accelerating Universe composedof » 1/3 of matter (baryonic + dark) and » 2/3 of an exotic component with large negative pressure,usually named Dark Energy or Quintessence. The basic set of experiments includes: observations from SNeIa, CMB anisotropies, large scale structure, X-ray data from galaxy clusters, age estimates of globular clustersand old high redshift galaxies (OHRGs). It is now widely believed that such results provide the remaining pieceof information connecting the inflationary flatness prediction (T = 1) with astronomical observations. From atheoretical viewpoint, they have also stimulated the current interest for more general models containing an extracomponent describing this unknown dark energy, and simultaneously accounting for the present acceleratingstage of the Universe. In this review we present a simplified picture of the main results and discuss briefly somedifficulties underlying the emerging dark energy paradigm. 2004 artículo científico 0103-9733 https://www.redalyc.org/articulo.oa?id=46400108 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.1A Vol.34 |
| format | Artículo científico |
| id | redalyc_46400108 |
| institution | Redalyc |
| language | en |
| publishDate | 2004 |
| publisher | Sociedade Brasileira de Física |
| spellingShingle | Alternative Dark Energy Models: An Overview J. A. S. Lima Física, Astronomía y Matemáticas Alternative Dark Energy Models: An Overview J. A. S. Lima Física, Astronomía y Matemáticas A large number of recent observational data strongly suggest that we live in a flat, accelerating Universe composedof » 1/3 of matter (baryonic + dark) and » 2/3 of an exotic component with large negative pressure,usually named Dark Energy or Quintessence. The basic set of experiments includes: observations from SNeIa, CMB anisotropies, large scale structure, X-ray data from galaxy clusters, age estimates of globular clustersand old high redshift galaxies (OHRGs). It is now widely believed that such results provide the remaining pieceof information connecting the inflationary flatness prediction (T = 1) with astronomical observations. From atheoretical viewpoint, they have also stimulated the current interest for more general models containing an extracomponent describing this unknown dark energy, and simultaneously accounting for the present acceleratingstage of the Universe. In this review we present a simplified picture of the main results and discuss briefly somedifficulties underlying the emerging dark energy paradigm. 2004 artículo científico 0103-9733 https://www.redalyc.org/articulo.oa?id=46400108 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.1A Vol.34 |
| title | Alternative Dark Energy Models: An Overview |
| topic | Física, Astronomía y Matemáticas |
| url | https://www.redalyc.org/articulo.oa?id=46400108 |