Constraints on alternative models to dark energy

Details Constraints on alternative models to dark energy Constraints on alternative models to dark energy

2003-11-19

arxiv.org/abs/gr-qc/0311060v2

Class.Quant.Grav. 21 (2004) 3655

Astronomy and Astrophysics

Astrophysics

General Relativity and Quantum Cosmology

10 pages, 1 figure, revtex4

Scientific paper

10.1088/0264-9381/21/15/003

The recent observations of type Ia supernovae strongly support that the universe is accelerating now and decelerated in the recent past. This may be the evidence of the breakdown of the standard Friemann equation. We consider a general modified Friedmann equation. Three different models are analyzed in detail. The current supernovae data and the Wilkinson microwave anisotropy probe data are used to constrain these models. A detailed analysis of the transition from the deceleration phase to the acceleration phase is also performed.

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