The Limits on Cosmological Anisotropies and Inhomogeneities from COBE Data

Details The Limits on Cosmological Anisotropies and Inhomogeneities from COBE Data The Limits on Cosmological Anisotropies and Inhomogeneities from COBE Data

1999-04-25

arxiv.org/abs/astro-ph/9904346v1

Astrophys.J. 476 (1997) 435

Astronomy and Astrophysics

Astrophysics

Original paper with corrections. ApJ 476 435 (1997) erratum to appear ApJ Sept 1999

Scientific paper

10.1086/303633

Assuming that the cosmological principle holds, Maartens, Ellis and Stoeger (MES) recently constructed a detailed scheme linking anisotropies in the cosmic background radiation (CMB) with anisotropies and inhomogeneities in the large scale structure of the universe and showed how to place limits on those anisotropies and inhomogeneities simply by using CMB quadrupole and octupole limits. First we indicate and discuss the connection between the covariant multipole moments of the temperature anisotropy used in the MES scheme and the quadrupole and octupole results from COBE. Then we introduce those results into the MES limit equations to obtain definite quantitative limits on the complete set of cosmological measures of anisotropy and inhomogeneity. We find that all the anisotropy measures are less than 10^{-4} in the case of those not affected by the expansion rate H, and less than 10^{-6} Mpc^{-1} in the case of those which are. These results quantitatively demonstrate that the observable universe is indeed close to Friedmann-Lemaitre-Robertson-Walker (FLRW) on the largest scales, and can be adequately modelled by an almost-FLRW model -- that is, the anisotropies and inhomogeneities characterizing the observable universe on the largest scales are not too large to be considered perturbations to FLRW.

Affiliated with

Also associated with

No associations

Rating

The Limits on Cosmological Anisotropies and Inhomogeneities from COBE Data 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 Limits on Cosmological Anisotropies and Inhomogeneities from COBE Data, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and The Limits on Cosmological Anisotropies and Inhomogeneities from COBE Data will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFWR-SCP-O-299206