Abstract
We investigated the SU(2) Einstein–Yang–Mills system with a cosmological constant on a time-dependent non-diagonal cylindrical symmetric spacetime. Only for suitable negative Λ and specific initial values, we find numerically regular wave-like solutions dressed with both electric and magnetic charges. The cosmic string feature is maintained by the finite angle deficit the solutions possess. In general the solution will develop a cosmological horizon; however, it resolves for increasing negative values of the cosmological constant and increasing time. Further, the features of the dyon depend on the angular momentum flux.
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