Conserved quantities in the perturbed Friedmann world model
classification
🌌 astro-ph
gr-qc
keywords
conservedmodelperturbedquantitiesscaleworldamplitudeangular
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The evolutions of linear structures in a spatially homogeneous and isotropic world model are characterized by some conserved quantities: the amplitude of gravitational wave is conserved in the super-horizon scale, the perturbed three-space curvature in the comoving gauge is conserved in the super-sound-horizon scale, and the angular momentum of rotational perturbation is generally conserved.
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