The Possibility of Cosmic Acceleration via Spatial Averaging in Lemaitre-Tolman-Bondi Models

Details The Possibility of Cosmic Acceleration via Spatial Averaging in Lemaitre-Tolman-Bondi Models The Possibility of Cosmic Acceleration via Spatial Averaging in Lemaitre-Tolman-Bondi Models

2006-05-08

arxiv.org/abs/astro-ph/0605195v3

Class.Quant.Grav.23:6955-6969,2006

Astronomy and Astrophysics

Astrophysics

15 pages, 5 figures; (v2) figures 2 and 3 corrected, references added, main conclusions remain unchanged; (v3) some clarificat

Scientific paper

10.1088/0264-9381/23/23/022

We investigate the possible occurrence of a positive cosmic acceleration in a
spatially averaged, expanding, unbound Lemaitre-Tolman-Bondi cosmology. By
studying an approximation in which the contribution of three-curvature
dominates over the matter density, we construct numerical models which exhibit
acceleration.

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