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Stationary Scalar Clouds around Kerr-Newman Black Holes

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arxiv 2408.09243 v1 pith:6SI4GHXR submitted 2024-08-17 gr-qc

Guangzhou Guo , Peng Wang , Tianshu Wu , Haitang Yang This is my paper
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keywords scalarcloudsblackaroundcloudexcitedexistenceformation
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This study investigates scalar clouds around Kerr-Newman black holes within the Einstein-Maxwell-scalar model. Tachyonic instabilities are identified as the driving mechanism for scalar cloud formation. Employing the spectral method, we numerically compute wave functions and parameter space existence domains for both fundamental and excited scalar cloud modes. Our analysis demonstrates that black hole spin imposes an upper limit on the existence of scalar clouds, with excited modes requiring stronger tachyonic instabilities for their formation. These findings lay the groundwork for exploring the nonlinear dynamics and astrophysical implications of scalar clouds.

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Cited by 1 Pith paper

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  1. Spin-induced Scalarized Black Holes in Einstein-Maxwell-scalar Models

    gr-qc 2025-06 conditional novelty 6.0 of 10

    Spin-induced scalarized Kerr-Newman black holes are constructed numerically for negative coupling, and they coexist with stable, entropically favored Kerr-Newman black holes.

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