 |
 |
 |
|
|
|
| HAL : in2p3-00193780, version 1 |
| arXiv : 0711.0686 |
| DOI : 10.1007/s10773-010-0639-0 |
| Fiche détaillée |  Récupérer au format |
|
|
| International Journal of Theoretical Physics 50 (2011) 939-951 |
|
|
|
|
| Phenomenology of Λ-CDM Model: A Possibility of Accelerating Universe with Positive Pressure |
|
|
| S. RayM.Y. Khlopov1, 2P.P. GhoshU. Mukhopadhyay |
|
|
| (2011) |
|
|
|
| Among various phenomenological $\Lambda$ models, a time-dependent model $\dot \Lambda\sim H^3$ is selected here to investigate the $\Lambda$-CDM cosmology. Using this model the expressions for the time-dependent equation of state parameter $\omega$ and other physical parameters are derived. It is shown that in $H^3$ model accelerated expansion of the Universe takes place at negative energy density, but with a positive pressure. It has also been possible to obtain the change of sign of the deceleration parameter $q$ during cosmic evolution. |
|
|
|
|
|
|
|
|
|
|
|
| 1 : | APC - AstroParticule et Cosmologie |
|
|
| 2 : | Center for cosmoparticle physics "Cosmion" - Center for cosmoparticle physics "Cosmion" |
|
|
|
|
|
|
|
|
|
| APC - THEORIE |
|
|
|
|
| Thème(s) | : | Physique/Relativité Générale et Cosmologie Quantique |
|
|
| General relativity – Dark energy – Variable Λ |
|
|
|
| Lien vers le texte intégral : |
|
| http://fr.arXiv.org/abs/0711.0686 |
| in2p3-00193780, version 1 | |
| http://hal.in2p3.fr/in2p3-00193780 | |
| oai:hal.in2p3.fr:in2p3-00193780 | |
| Contributeur : Simone Lantz | |
| Soumis le : Mardi 4 Décembre 2007, 15:44:04 | |
| Dernière modification le : Mardi 28 Août 2012, 17:57:27 | |
