Kantowski-Sachs Universes sourced by a Skyrme fluid

Abstract

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.

9 pages, 7 figures, 3 tables; v2 Sec. II extended, typos corrected. Matches the published version

References in corpus (8)

• Loop Quantum Dynamics of the Schwarzschild Interior
• Hedgehog ansatz and its generalization for self-gravitating Skyrmions
• Dynamical systems analysis of anisotropic cosmologies in $R^n$-gravity
• Kantowski-Sachs spacetime in loop quantum cosmology: bounds on expansion and shear scalars and the viability of quantization
• On the Possibility of Anisotropic Curvature in Cosmology
• Exact multi-soliton solutions in the four dimensional Skyrme model
• Stability of the Schwarzschild Interior in Loop Quantum Gravity
• Cosmological dynamics of gravitating hadron matter

Cited by in corpus (2)

• Exact solution of the Einstein-Skyrme model in a Kantowski-Sachs spacetime
• Dynamics of gravitating hadron matter in Bianchi-IX cosmological model