Duality and mu separability of Maxwell equations in Kerr-NUT-(A)dS spacetimes

Abstract

We study properties of a recently proposed new ansatz for separation of variables in the Maxwell equations in four-dimensional Kerr-NUT-(A)dS spacetime. We demonstrate that a dual field, which is also a solution of the source-free Maxwell equations, can be presented in a similar form.

This result implies that the corresponding separated equations possess a discrete symmetry under a special transform of the separation parameters.

Keywords

• Duality
• separability
• Maxwell equations
• Kerr-NUT-AdS spacetimes