Dark energy models toward observational tests and data

Details Dark energy models toward observational tests and data Dark energy models toward observational tests and data

2007-06-25

arxiv.org/abs/0706.3587v1

ECONF C0602061:04,2006; Int.J.Geom.Meth.Mod.Phys.4:53-78,2007

Astronomy and Astrophysics

Astrophysics

17 pages, 9 figures, Lectures for 42nd Karpacz Winter School of Theoretical Physics: Current Mathematical Topics in Gravitatio

Scientific paper

10.1142/S0219887807001886

A huge amount of good quality astrophysical data converges towards the picture of a spatially flat universe undergoing the today observed phase of accelerated expansion. This new observational trend is commonly addressed as Precision Cosmology. Despite of the quality of astrophysical surveys, the nature of dark energy dominating the matter-energy content of the universe is still unknown and a lot of different scenarios are viable candidates to explain cosmic acceleration. Methods to test these cosmological models are based on distance measurements and lookback time toward astronomical objects used as standard candles. I discuss the characterizing parameters and constraints of three different classes of dark energy models pointing out the related degeneracy problem which is the signal that more data at low (z= 0- 1), medium (1

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