The effect of structure formation on the expansion of the universe

Details The effect of structure formation on the expansion of the universe The effect of structure formation on the expansion of the universe

2008-05-17

arxiv.org/abs/0805.2670v1

Int.J.Mod.Phys.D17:2543-2548,2008

Astronomy and Astrophysics

Astrophysics

6 pages, 1 figure. Awarded Honorable Mention in the 2008 Gravity Research Foundation essay competition. More extended treatmen

Scientific paper

10.1142/S0218271808014059

Observations of the expansion rate of the universe at late times disagree by a factor of 1.5-2 with the prediction of homogeneous and isotropic models based on ordinary matter and gravity. We discuss how the departure from linearly perturbed homogeneity and isotropy due to structure formation could explain this discrepancy. We evaluate the expansion rate in a dust universe which contains non-linear structures with a statistically homogeneous and isotropic distribution. The expansion rate is found to increase relative to the exactly homogeneous and isotropic case by a factor of 1.1-1.3 at some tens of billion of years. The timescale follows from the cold dark matter transfer function and the amplitude of primordial perturbations without additional free parameters.

Affiliated with

Also associated with

No associations

Rating

The effect of structure formation on the expansion of the universe does not yet have a rating. At this time, there are no reviews or comments for this scientific paper.

If you have personal experience with The effect of structure formation on the expansion of the universe, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and The effect of structure formation on the expansion of the universe will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFWR-SCP-O-614512