Starting from a recently constructed stealth Kerr solution of higher order scalar tensor theory, I will discuss disformal versions of the Kerr spacetime with a constant disformal factor and a regular scalar field. While the disformed metric has only a ring singularity and asymptotically is quite similar to Kerr, it is neither Ricci flat nor circular. Non-circularity has far reaching consequences on the structure of the solution. In particular, I will discuss the properties of important hypersurfaces in the disformed spacetime: ergosphere, stationary limit and event horizon, and highlight the differences with the Kerr metric.
Event organized by CEICO, Central European Institute for Cosmology and Fundamental Physics.
Please contact Roberto Oliveri or Gizem Sengor for further info.