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- Bradley, Michael, et al.
(författare)
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Perturbations of Kantowski-Sachs models
- 2015
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Ingår i: Proceedings of the thirteenth Marcel Grossman meeting on general relativity. - Singapore : World Scientific. - 9789814612142 - 9789814630009 ; , s. 2547-2549
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Konferensbidrag (refereegranskat)abstract
- Perturbations of Kantowski-Sachs models with a positive cosmological constant are considered in a harmonic decomposition, in the framework of gauge invariant 1+3 and 1+1+2 covariant splits of spacetime. Scalar, vector and tensor modes are allowed, however they remain vorticity-free and of perfect fluid type. The dynamics is encompassed in six evolution equations for six harmonic coefficients.
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