LIMITS ON ANISOTROPY AND INHOMOGENEITY FROM THE COSMIC BACKGROUND RADIATION,

Abstract

We consider directly the equations by which matter imposes anisotropies on freely propagating background radiation, leading to a new way of using anisotropy measurements to limit the deviations of the Universe from a Friedmann-Robertson-Walker (FRW) geometry. This approach is complementary to the usual Sachs-Wolfe approach: the limits obtained are not as detailed, but they are more model-independent. We also give new results about combined matter-radiation perturbations in an almost-FRW universe, and a new exact solution of the linearised equations.

18 pages Latex.

References in corpus (6)

• The Imprint of Gravitational Waves on the Cosmic Microwave Background
• Reconstructing the Inflaton Potential---in Principle and in Practice
• Reionization and cosmic microwave background distortions: a complete treatment of second order Compton scattering
• The Angular Bispectrum of The Cosmic Microwave Background
• Kinetic vs. Thermal-Field-Theory Approach to Cosmological Perturbations
• Testing Inflation with the Cosmic Microwave Background

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