Cosmological Perturbation Theory With Background Anisotropic Curvature

Details Cosmological Perturbation Theory With Background Anisotropic Curvature Cosmological Perturbation Theory With Background Anisotropic Curvature

2011-07-02

arxiv.org/abs/1107.0389v1

Astronomy and Astrophysics

Astrophysics

General Relativity and Quantum Cosmology

Scientific paper

The theory of cosmological perturbations is extended to spacetimes displaying isotropic expansion but anisotropic curvature. The perturbed Einstein equation and Boltzmann equations for massless and massive particles are derived in a general gauge and a decomposition of perturbations into harmonic modes and moments is proposed. Generalization to the case where anisotropic expansion is also present in the background is discussed.

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