Kantowski-Sachs Universes sourced by a Skyrme fluid [CL]


The Kantowski-Sachs cosmological model sourced by a Skyrme field and a cosmological constant is considered in the framework of General Relativity. Assuming a constant radial profile function for the hedgehog ansatz, the Skyrme contribution to Einstein equations is shown to be equivalent to an anisotropic fluid. Using dynamical system techniques, a qualitative analysis of the cosmological equations is presented. Physically interesting features of the model such as isotropization, bounce and recollapse are discussed.

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L. Parisi, N. Radicella and G. Vilasi
Tue, 9 Dec 14

Comments: p pages, 7 figures, 3 tables