Parametrization for the Scale Dependent Growth in Modified Gravity

Details Parametrization for the Scale Dependent Growth in Modified Gravity Parametrization for the Scale Dependent Growth in Modified Gravity

2010-04-27

arxiv.org/abs/1004.4905v4

JCAP 1009:021,2010

Astronomy and Astrophysics

Astrophysics

Cosmology and Extragalactic Astrophysics

10 pages, 5 figures. Minor modifications and references added to match published version

Scientific paper

10.1088/1475-7516/2010/09/021

We propose a scale dependent analytic approximation to the exact linear growth of density perturbations in Scalar-Tensor (ST) cosmologies. In particular, we show that on large subhorizon scales, in the Newtonian gauge, the usual scale independent subhorizon growth equation does not describe the growth of perturbations accurately, as a result of scale-dependent relativistic corrections to the Poisson equation. A comparison with exact linear numerical analysis indicates that our approximation is a significant improvement over the standard subhorizon scale independent result on large subhorizon scales. A comparison with the corresponding results in the Synchronous gauge demonstrates the validity and consistency of our analysis.

Affiliated with

Also associated with

No associations

Rating

Parametrization for the Scale Dependent Growth in Modified Gravity 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 Parametrization for the Scale Dependent Growth in Modified Gravity, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Parametrization for the Scale Dependent Growth in Modified Gravity will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFWR-SCP-O-67381