Newtonian Limits of the Relativistic Cosmological Perturbations

Details Newtonian Limits of the Relativistic Cosmological Perturbations Newtonian Limits of the Relativistic Cosmological Perturbations

1997-01-20

arxiv.org/abs/astro-ph/9701137v1

Astronomy and Astrophysics

Astrophysics

11 pages, revtex, no figures

Scientific paper

Relativistic cosmological perturbation analyses can be made based on several different fundamental gauge conditions. In the pressureless limit the variables in certain gauge conditions show the correct Newtonian behaviors. We consider the general curvature and the cosmological constant in the background medium. The perturbed density in the comoving gauge, and the perturbed velocity and the perturbed potential in the zero-shear gauge show the same behavior as the Newtonian ones in a general scale. Far inside horizon, except for the uniform-density gauge, density perturbations in all the fundamental gauge conditions show the correct Newtonian behavior. In this paper we elaborate these Newtonian correspondences. We also present the relativistic results considering general pressures in the background and perturbation.

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