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arxiv: astro-ph/9909150 · v1 · submitted 1999-09-09 · 🌌 astro-ph · gr-qc

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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