Analytic Solutions for Cosmological Perturbations in Multi-Dimensional Space-Time

Details Analytic Solutions for Cosmological Perturbations in Multi-Dimensional Space-Time Analytic Solutions for Cosmological Perturbations in Multi-Dimensional Space-Time

1993-06-07

arxiv.org/abs/gr-qc/9306009v2

Int.J.Mod.Phys.D3:265-268,1994

Astronomy and Astrophysics

Astrophysics

General Relativity and Quantum Cosmology

6 pages (incl. 3 figures), LaTeX (epsf), TUW-93-07, two misprints corrected (one formula, one reference)

Scientific paper

10.1142/S0218271894000423

We obtain analytic solutions for the density contrast and the anisotropic pressure in a multi-dimensional FRW cosmology with collisionless, massless matter. These are compared with perturbations of a perfect fluid universe. To describe the metric perturbations we use manifest gauge invariant metric potentials. The matter perturbations are calculated by means of (automatically gauge invariant) finite temperature field theory, instead of kinetic theory. (Talk given at the Journ\'ees Relativistes '93, 5 -- 7 April, Brussels, Belgium)

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