Why not a di-NUT? or Gravitational duality and rotating solutions

Understand

We study how gravitational duality acts on rotating solutions, using the Kerr-NUT black hole as an example.

• After properly reconsidering how to take into account both electric (i.e.
• mass-like) and magnetic (i.e.
• NUT-like) sources in the equations of general relativity, we propose a set of definitions for the dual Lorentz charges.