Astronomy and Astrophysics – Astrophysics
Scientific paper
2005-12-16
Astrophys.J.644:701-708,2006
Astronomy and Astrophysics
Astrophysics
submitted to ApJ
Scientific paper
10.1086/503893
We generalize the predictions for the CMB anisotropy patterns arising in Bianchi type VIIh universes to include a dark energy component. We consider these models in light of the result of Jaffe et al. (2005a,b) in which a correlation was found on large angular scales between the WMAP data and the anisotropy structure in a low density Bianchi universe. We find that by including a term Omega_L > 0, the same best-fit anisotropy pattern is reproduced by several combinations of cosmological parameters. This sub-set of models can then be further constrained by current observations that limit the values of various cosmological parameters. In particular, we consider the so-called geometric degeneracy in these parameters imposed by the peak structure of the WMAP data itself. Apparently, despite the additional freedom allowed by the dark energy component, the modified Bianchi models are ruled out at high significance.
Banday Anthony J.
Górski Kris M.
Hervik Sigbjorn
Jaffe T. R.
No associations
LandOfFree
On the Viability of Bianchi Type VIIh Models with Dark Energy 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 On the Viability of Bianchi Type VIIh Models with Dark Energy, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and On the Viability of Bianchi Type VIIh Models with Dark Energy will most certainly appreciate the feedback.
Profile ID: LFWR-SCP-O-111617