Testing and selection cosmological models with dark energy

Details Testing and selection cosmological models with dark energy Testing and selection cosmological models with dark energy

2006-03-20

arxiv.org/abs/astro-ph/0603538v1

Astronomy and Astrophysics

Astrophysics

Talk at Albert Einstein Century International Conference at Palais de l'Unesco, Paris, France, 18-23 July 2005; to appear in t

Scientific paper

10.1063/1.2399695

It is described dynamics of a large class of accelerating cosmological models in terms of dynamical systems of the Newtonian type. The evolution of the models is reduced to the motion of a particle in a potential well parameterized by the scale factor. This potential function can be reconstructed from distant supernovae type Ia data and many cosmological models represented in terms of the potential becomes in a good agreement with current observational data. It is proposed to use the information criteria to overcome this degeneracy within a class of A) dark energy models and B) simple models basing on modification of the FRW equation. Two class of models can be recommended by the Akaike (AIC) and Schwarz (BIC) information criteria: the phantom and $\Lambda$CDM models.

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