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Journal of High Energy Physics

, 2017:37 | Cite as

Skyrmions, Skyrme stars and black holes with Skyrme hair in five spacetime dimension

  • Yves Brihaye
  • Carlos Herdeiro
  • Eugen Radu
  • D.H. Tchrakian
Open Access
Regular Article - Theoretical Physics

Abstract

We consider a class of generalizations of the Skyrme model to five spacetime dimensions (d = 5), which is defined in terms of an O(5) sigma model. A special ansatz for the Skyrme field allows angular momentum to be present and equations of motion with a radial dependence only. Using it, we obtain: 1) everywhere regular solutions describing localised energy lumps (Skyrmions); 2) Self-gravitating, asymptotically flat, everywhere non-singular solitonic solutions (Skyrme stars), upon minimally coupling the model to Einstein’s gravity; 3) both static and spinning black holes with Skyrme hair, the latter with rotation in two orthogonal planes, with both angular momenta of equal magnitude. In the absence of gravity we present an analytic solution that satisfies a BPS-type bound and explore numerically some of the non-BPS solutions. In the presence of gravity, we contrast the solutions to this model with solutions to a complex scalar field model, namely boson stars and black holes with synchronised hair. Remarkably, even though the two models present key differences, and in particular the Skyrme model allows static hairy black holes, when introducing rotation, the synchronisation condition becomes mandatory, providing further evidence for its generality in obtaining rotating hairy black holes.

Keywords

Black Holes Classical Theories of Gravity 

Notes

Open Access

This article is distributed under the terms of the Creative Commons Attribution License (CC-BY 4.0), which permits any use, distribution and reproduction in any medium, provided the original author(s) and source are credited.

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© The Author(s) 2017

Authors and Affiliations

  1. 1.Physique-Mathématique, Universite de Mons-HainautMonsBelgium
  2. 2.Departamento de Física da Universidade de Aveiro and Centre for Research and Development in Mathematics and Applications (CIDMA)AveiroPortugal
  3. 3.School of Theoretical Physics — Dublin Institute for Advanced StudiesDublin 4Ireland
  4. 4.Department of Computer ScienceMaynooth UniversityMaynoothIreland

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