Ultra-hard fluid and scalar field in the Kerr-Newman metric
E. Babichev, S. Chernov, V. Dokuchaev, Yu. Eroshenko
TL;DR
This paper presents new analytic solutions for ultra-hard fluid accretion onto Kerr-Newman black holes and scalar fields around naked singularities, extending previous models and highlighting limitations for extreme black holes.
Contribution
It generalizes existing solutions for fluid accretion to Kerr-Newman black holes and introduces a stationary scalar field solution for naked singularities.
Findings
Analytic solution for ultra-hard fluid accretion onto Kerr-Newman black holes.
Stationary scalar field solution in Kerr-Newman naked singularity metric.
Limitations identified for extreme black holes due to test fluid approximation.
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.
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