Title

Bayesian Limits on Primordial Isotropy Breaking

Author(s)/Creator(s)

Christian Armendariz-Picon, Department of Physics, Syracuse University, Syracuse, NYFollow
Larne Pekowsky, Syracuse University

Document Type

Article

Date

7-17-2008

Language

English

Disciplines

Physics

Description/Abstract

It is often assumed that primordial perturbations are statistically isotropic, which implies, among other properties, that their power spectrum is invariant under rotations. In this article, we test this assumption by placing model-independent bounds on deviations from rotational invariance of the primordial spectrum. Using five-year WMAP cosmic microwave anisotropy maps, we set limits on the overall norm and the amplitude of individual components of the primordial spectrum quadrupole. We find that there is no significant evidence for primordial isotropy breaking, and that an eventually non-vanishing quadrupole has to be subdominant.

Additional Information

6 double-column pages, 2 figues and 2 tables. Uses REVTeX4 More information at http://arxiv.org/abs/0807.2687

Recommended Citation

Armendariz-Picon, Christian and Pekowsky, Larne, "Bayesian Limits on Primordial Isotropy Breaking" (2008). Physics - All Scholarship. 226.
https://surface.syr.edu/phy/226

Source

Harvested from Arxiv.org