Ultra-hard fluid and scalar field in the Kerr-Newman metric
arXiv:0807.0449 · doi:10.1103/PhysRevD.78.104027
Abstract
An analytic solution for the accretion of ultra-hard perfect fluid onto a moving Kerr-Newman black hole is found. This solution is a generalization of the previously known solution by Petrich, Shapiro and Teukolsky for a Kerr black hole. Our solution is not applicable for an extreme black hole due to violation of the test fluid approximation. We also present a stationary solution for a massless scalar field in the metric of a Kerr-Newman naked singularity.
9 pages, 3 figures, revtex4; v2: presentation improved, figures added, matches published version