An almost isotropic cosmic microwave temperature does not imply an almost isotropic universe

Details An almost isotropic cosmic microwave temperature does not imply an almost isotropic universe An almost isotropic cosmic microwave temperature does not imply an almost isotropic universe

1999-04-19

arxiv.org/abs/astro-ph/9904252v1

Astrophys.J. 522 (1999) L1

Astronomy and Astrophysics

Astrophysics

5 pages (AASTeX, aaspp4.sty), submitted to Astrophysical Journal Letters

Scientific paper

10.1086/312209

In this letter we will show that, contrary to what is widely believed, an almost isotropic cosmic microwave background (CMB) temperature does not imply that the universe is ``close to a Friedmann-Lemaitre universe''. There are two important manifestations of anisotropy in the geometry of the universe, (i) the anisotropy in the overall expansion, and (ii) the intrinsic anisotropy of the gravitational field, described by the Weyl curvature tensor, although the former usually receives more attention than the latter in the astrophysical literature. Here we consider a class of spatially homogeneous models for which the anisotropy of the CMB temperature is within the current observational limits but whose Weyl curvature is not negligible, i.e. these models are not close to isotropy even though the CMB temperature is almost isotropic.

Affiliated with

Also associated with

No associations

Rating

An almost isotropic cosmic microwave temperature does not imply an almost isotropic 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 An almost isotropic cosmic microwave temperature does not imply an almost isotropic universe, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and An almost isotropic cosmic microwave temperature does not imply an almost isotropic universe will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFWR-SCP-O-328589