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Ultra-hard fluid and scalar field in the Kerr-Newman metric

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arxiv 0807.0449 v2 pith:4XTJ2CLR submitted 2008-07-02 gr-qc astro-ph

Ultra-hard fluid and scalar field in the Kerr-Newman metric

classification gr-qc astro-ph
keywords solutionblackfluidholekerr-newmanfieldmetricscalar
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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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