Abstract
We review two procedures for constructing the vector potential of the electromagnetic field on Kerr spacetime, namely, the classic method of Cohen and Kegeles, yielding in a radiation gauge, and the newer method of Frolov et al., yielding in Lorenz gauge. We demonstrate that the vector potentials are related by straightforward gauge transformations, which we give in closed form. We obtain a new result for a separable Hertz potential such that .
- Received 2 July 2019
DOI:https://doi.org/10.1103/PhysRevD.100.044044
© 2019 American Physical Society
Physics Subject Headings (PhySH)
Gravitation, Cosmology & AstrophysicsParticles & Fields