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arXiv · 1304.1010

Perturbations of Kantowski-Sachs models with a cosmological constant

Zoltán Keresztes·Mats Forsberg·Michael Bradley·Peter K. S. Dunsby·László Á. Gergely
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Abstract

We investigate perturbations of Kantowski-Sachs models with a positive cosmological constant, using the gauge invariant 1+3 and 1+1+2 covariant splits of spacetime together with a harmonic decomposition. The perturbations are assumed to be vorticity-free and of perfect fluid type, but otherwise include general scalar, vector and tensor modes. In this case the set of equations can be reduced to six evolution equations for six harmonic coefficients.

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Zoltán Keresztes, Mats Forsberg, Michael Bradley, Peter K. S. Dunsby, László Á. Gergely. 2013-04-03. Perturbations of Kantowski-Sachs models with a cosmological constant. https://doi.org/10.1007/978-3-642-40157-2_40

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