Constraining Anisotropic Baryon Oscillations

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dc.creatorPadmanabhan, Nikhil
dc.creatorWhite, Martin
dc.date2008-04-05
dc.date.accessioned2026-07-07T11:49:37Z
dc.date.available2026-07-07T11:49:37Z
dc.descriptionWe 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.
dc.description4 pages, 2 figs
dc.identifierhttps://arxiv.org/abs/0804.0799
dc.identifierhttp://arxiv.org/abs/0804.0799
dc.identifierPhys.Rev.D77:123540,2008
dc.identifierdoi:10.1103/PhysRevD.77.123540
dc.identifier.urihttp://salesiana.dossiersoluciones.com/handle/123456789/203297
dc.subjectAstrophysics
dc.titleConstraining Anisotropic Baryon Oscillations
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