Asymptotic Behavior of a Class of Expanding Gowdy Spacetimes

Details Asymptotic Behavior of a Class of Expanding Gowdy Spacetimes Asymptotic Behavior of a Class of Expanding Gowdy Spacetimes

2002-07-07

arxiv.org/abs/gr-qc/0207035v1

Astronomy and Astrophysics

Astrophysics

General Relativity and Quantum Cosmology

21 pages, 14 figures, uses RevTeX 4, submitted to Phys. Rev. D

Scientific paper

A systematic asymptotic expansion is developed for the gravitational wave degrees of freedom of a class of expanding, vacuum Gowdy cosmological spacetimes. In the wave map description of these models, the evolution of the gravitational wave amplitudes defines an orbit in the target space. The circumference of this orbit decays to zero indicating that the asymptotic spacetime is spatially homogeneous. A prescription is given to identify the asymptotic cosmological model for the gravitational wave degrees of freedom using the asymptotic point in the target space. The remaining metric function of the asymptotic cosmological model, found by solving the constraints, is determined by an effective energy of the gravitational waves rather than from the asymptotic point in the target space.

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