2026-07-072026-07-07http://salesiana.dossiersoluciones.com/handle/123456789/211346An 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 versionGeneral Relativity and Quantum CosmologyAstrophysicstext