Light propagation and the average expansion rate in near-FRW universes

Details Light propagation and the average expansion rate in near-FRW universes Light propagation and the average expansion rate in near-FRW universes

2011-07-06

arxiv.org/abs/1107.1176v1

Astronomy and Astrophysics

Astrophysics

Cosmology and Extragalactic Astrophysics

26 pages, no figures

Scientific paper

We consider universes which are close to Friedmann-Robertson-Walker in the sense that metric perturbations, their time derivatives and first spatial derivatives are small, but second spatial derivatives are not constrained. We show that if we in addition assume that the observer four-velocity is close to its background value and close to the four-velocity which defines the hypersurface of averaging, the redshift and the average expansion rate remain close to the FRW case, but this is not true for the angular diameter distance. The four-velocity assumption implies certain conditions on second derivatives of the metric and/or the matter content.

Affiliated with

Also associated with

No associations

Rating

Light propagation and the average expansion rate in near-FRW universes 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 Light propagation and the average expansion rate in near-FRW universes, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Light propagation and the average expansion rate in near-FRW universes will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFWR-SCP-O-678732