Density perturbations in a flat universe

Details Density perturbations in a flat universe Density perturbations in a flat universe

Apr 1990

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1990gregr..22..389b&link_type=abstract

General Relativity and Gravitation, Volume 22, Issue 4, pp.389-392

Physics

2

Scientific paper

A well-known solution, for a flat model in general relativity obeying the Robertson-Walker metric, a perfect fluid energy-tensor and a perfect gas law of state, with constant deceleration parameter, is now shown to yield growing scalar density perturbations, provided thatq > 0. This study generalizes Weinberg's results for the radiation phase, and shows that any realistic model of this kind contains gravitational instabilities

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