Abstract
We propose to study the behavior of complicated numerical solutions to Einstein's equations for generic cosmologies by following the geodesic motion of a swarm of test particles. As an example, we consider a cylinder of test particles initially at rest in the plane symmetric Gowdy universe onT 3×R. For a circle of test particles in the symmetry plane, the geodesic equations predict evolution of the circle into distortions and rotations of an ellipse as well as motion perpendicular to the plane. The evolutionary sequence of ellipses depends on the initial position of the circle of particles. We display snapshots of the evolution of the cylinder.
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Berger, B.K., Garfinkle, D. & Swamy, V. Detection of computer generated gravitational waves in numerical cosmologies. Gen Relat Gravit 27, 511–527 (1995). https://doi.org/10.1007/BF02105076
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DOI: https://doi.org/10.1007/BF02105076