Accelerating Cosmology Driven by Gravitational Production of Dark Matter Particles: Constraints from SNe Ia and H(z) data

Details Accelerating Cosmology Driven by Gravitational Production of Dark Matter Particles: Constraints from SNe Ia and H(z) data Accelerating Cosmology Driven by Gravitational Production of Dark Matter Particles: Constraints from SNe Ia and H(z) data

2011-03-25

arxiv.org/abs/1103.4988v1

Astronomy and Astrophysics

Astrophysics

Cosmology and Extragalactic Astrophysics

3 pages, 3 figures, to appear in the 12th Marcel Grossman Proceedings

Scientific paper

The free parameters of a flat accelerating model without dark energy are constrained by using Supernovae type Ia and observational H(z) data. Instead of the vacuum dominance, the present accelerating stage in this modified Einstein-de Sitter cosmology is a consequence of the gravitationally-induced particle production of cold dark matter. The model present a transition from a decelerating to an accelerating regime at low redshifts, and is also able to harmonize a cold dark matter picture with the latest measurements of the Hubble constant H_0, the Supernovae observations (Constitution sample), and the H(z) data.

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