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<p>We construct a three-parameter family of smooth and horizonless rotating solutions of Einstein-Maxwell theory with Chern-Simons term in five dimensions and discuss their stringy origin in terms of three-charge brane systems in Type IIB and M-theory. The general solution encompasses Kerr and static Topological Star geometries. We show that for specific choices of the parameters and quantized values of the angular momentum the geometry terminates on a smooth five-dimensional cap, and it displays neither ergoregion nor closed timelike curves. The solution asymptotes to ℝ<sup>1<i>,</i>3</sup> × <i>S</i><sup>1</sup> up to a freely acting orbifold twist. We discuss the propagation of particles and waves showing that geodetic motion is integrable and the radial and angular propagation of scalar perturbations can be separated and described in terms of two ordinary differential equations of confluent Heun type.</p>

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Rotating Topological Stars

  • 期刊论文

  • 出版模式：

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  • 发表日期：

    2026年1月7日

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  • Massimo Bianchi,
  • Giuseppe Dibitetto,
  • Jose F. Morales,
  • Alejandro Ruipérez

摘要

We construct a three-parameter family of smooth and horizonless rotating solutions of Einstein-Maxwell theory with Chern-Simons term in five dimensions and discuss their stringy origin in terms of three-charge brane systems in Type IIB and M-theory. The general solution encompasses Kerr and static Topological Star geometries. We show that for specific choices of the parameters and quantized values of the angular momentum the geometry terminates on a smooth five-dimensional cap, and it displays neither ergoregion nor closed timelike curves. The solution asymptotes to ℝ1,3 × S1 up to a freely acting orbifold twist. We discuss the propagation of particles and waves showing that geodetic motion is integrable and the radial and angular propagation of scalar perturbations can be separated and described in terms of two ordinary differential equations of confluent Heun type.