Temperature and Polarization Patterns in Anisotropic Cosmologies

Details Temperature and Polarization Patterns in Anisotropic Cosmologies Temperature and Polarization Patterns in Anisotropic Cosmologies

2010-04-06

arxiv.org/abs/1004.0957v2

Astronomy and Astrophysics

Astrophysics

Cosmology and Extragalactic Astrophysics

24 pages, 7 Figures, submitted to JCAP. Revised version: numerous references added, text rewritten, and errors corrected.

Scientific paper

We study the coherent temperature and polarization patterns produced in homogeneous but anisotropic cosmological models. We show results for all Bianchi types with a Friedman-Robertson-Walker limit (i.e. Types I, V, VII$_{0}$, VII$_{h}$ and IX) to illustrate the range of possible behaviour. We discuss the role of spatial curvature, shear and rotation in the geodesic equations for each model and establish some basic results concerning the symmetries of the patterns produced. We also give examples of the time-evolution of these patterns in terms of the Stokes parameters $I$, $Q$ and $U$.

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