Noether symmetry approach in phantom quintessence cosmology

Details Noether symmetry approach in phantom quintessence cosmology Noether symmetry approach in phantom quintessence cosmology

2009-08-15

arxiv.org/abs/0908.2362v2

Phys.Rev.D80:104030,2009

Astronomy and Astrophysics

Astrophysics

Cosmology and Extragalactic Astrophysics

26 pages, 13 figures

Scientific paper

10.1103/PhysRevD.80.104030

In the framework of phantom quintessence cosmology, we use the Noether Symmetry Approach to obtain general exact solutions for the cosmological equations. This result is achieved by the quintessential (phantom) potential determined by the existence of the symmetry itself. A comparison between the theoretical model and observations is worked out. In particular, we use type Ia supernovae and large scale structure parameters determined from the 2-degree Field Galaxy Redshift Survey (2dFGRS)and from the Wide part of the VIMOS-VLT Deep Survey (VVDS). It turns out that the model is compatible with the presently available observational data. Moreover we extend the approach to include radiation. We show that it is compatible with data derived from recombination and it seems that quintessence do not affect nucleosynthesis results.

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