1+1+2 gravitational perturbations on LRS class II space-times: GEM vector harmonic amplitudes

Details 1+1+2 gravitational perturbations on LRS class II space-times: GEM vector harmonic amplitudes 1+1+2 gravitational perturbations on LRS class II space-times: GEM vector harmonic amplitudes

2007-08-19

arxiv.org/abs/0708.2558v1

Astronomy and Astrophysics

Astrophysics

General Relativity and Quantum Cosmology

Scientific paper

This is the second in a series of papers which considers first-order gauge-invariant and covariant gravitational perturbations to locally rotationally symmetric (LRS) class II space-times. This paper shows how to decouple a complex combination of the gravito-electromagnetic (GEM) 2-vectors with the 2-tensors describing the shear of the 2/3-sheets. An arbitrary harmonic expansion is then used along with an eigen-vector/value analysis of the first-order GEM system, analogous to the first paper in this series. This results in four real decoupled equations governing four real combinations of the harmonic amplitudes of the GEM 2-vectors and the (2/3-sheet) shear 2-tensors. Finally, these are categorized into polar and axial perturbations.

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