Exploració per tema "Dark energy"
Ara es mostren els items 1-6 de 6
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a-attractors in quintessential inflation motivated by supergravity
(American Physical Society, 2021-06-15)
Article
Accés obertAn exponential kind of quintessential inflation potential motivated by supergravity is studied. This type belongs to the class of a-attractor models. The model was studied for the first time by Dimopoulos and Owen in [J. ... -
Brane cosmology from observational surveys and its comparison with standard FRW cosmology
(2013-09)
Article
Accés restringit per política de l'editorialSeveral simple dark energy models on the brane are investigated. They are compared with corresponding models in the frame of 4d Friedmann-Robertson-Walker cosmology. For constraining the parameters of the models considered, ... -
Finite-time cosmological singularities and the possible fate of the Universe
(Elsevier, 2023-09-14)
Article
Accés restringit per política de l'editorialSingularities in any physical theory are either remarkable indicators of the unknown underlying fundamental theory, or indicate a change in the description of the physical reality. In General Relativity there are three ... -
Supernovae and dark energy
(Astronomical Society of the Pacific, 2008)
Text en actes de congrés
Accés obertA decade ago the observations of thermonuclear supernovae at high-redhifts showed that the expansion rate of the Universe is accelerating and since then, the evidence for cosmic acceleration has gotten stronger. This ... -
Theoretical and observational bounds on some interacting vacuum energy scenarios
(American Physical Society, 2021-04-15)
Article
Accés obertThe dynamics of interacting dark matter-dark energy models is characterized through an interaction rate function quantifying the energy flow between these dark sectors. In most of the interaction functions, the expansion ... -
Understanding the phenomenology of interacting dark energy scenarios and their theoretical bounds
(American Physical Society (APS), 2020-06-15)
Article
Accés obertNongravitational interaction between dark matter and dark energy has been considered in a spatially flat Friedmann-Lemaître-Robertson-Walker (FLRW) universe. The interaction rate is assumed to be linear in the energy ...