Astronomy and Astrophysics – Astrophysics
Scientific paper
2008-04-05
Phys.Rev.D77:123540,2008
Astronomy and Astrophysics
Astrophysics
4 pages, 2 figs
Scientific paper
10.1103/PhysRevD.77.123540
We present an analysis of anisotropic baryon acoustic oscillations and elucidate how a mis-estimation of the cosmology, which leads to incorrect values of the angular diameter distance, d_A, and Hubble parameter, H, manifest themselves in changes to the monopole and quadrupole power spectrum of biased tracers of the density field. Previous work has focused on the monopole power spectrum, and shown that the isotropic "dilation" combination d_A^2/H is robustly constrained by an overall shift in the scale of the baryon feature. We extend this by demonstrating that the quadrupole power spectrum is sensitive to an anisotropic "warping" mode d_A H, allowing one to break the degeneracy between d_A and H. We describe a method for measuring this warping, explicitly marginalizing over the form of redshift space distortions. We verify this method on N-body simulations and estimate that d_A H can be measured with a fractional accuracy of ~ 3/sqrt(V) % where the survey volume is estimated in (Gpc/h)^3.
Padmanabhan Nikhil
White Martin
No associations
LandOfFree
Constraining Anisotropic Baryon Oscillations 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 Constraining Anisotropic Baryon Oscillations, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Constraining Anisotropic Baryon Oscillations will most certainly appreciate the feedback.
Profile ID: LFWR-SCP-O-269937