Evolution of Scale-invariant Inhomogeneities in Standard Cosmology

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dc.creatorAbdalla, Elcio
dc.creatorMohayaee, Roya
dc.date1997-11-14
dc.date.accessioned2026-07-07T02:25:06Z
dc.date.available2026-07-07T02:25:06Z
dc.descriptionIt is shown that density fluctuations obey a scaling law in an open Friedmann universe. In a flat universe, the fluctuations are not scale-invariant. We compute the growth rate of adiabatic scale-invariant density fluctuations in flat, open and inflationary universes. We find that, given a sufficiently long time, the density perturbations decay away in the Einstein-de-Sitter universe. On the contrary, the rapid growth of the density instabilities makes an open universe inhomogeneous in a time scale comparable to the age of our universe. We also find that the fluctuations grow exponentially in a flat inflationary universe.
dc.descriptionlatex file, 19 pages
dc.identifierhttps://arxiv.org/abs/astro-ph/9711162
dc.identifierhttp://arxiv.org/abs/astro-ph/9711162
dc.identifier.urihttp://salesiana.dossiersoluciones.com/handle/123456789/11800
dc.subjectAstrophysics
dc.subjectGeneral Relativity and Quantum Cosmology
dc.subjectHigh Energy Physics - Theory
dc.titleEvolution of Scale-invariant Inhomogeneities in Standard Cosmology
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