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Rotating scalarized black holes: the role of the coupling

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arxiv 2503.15206 v1 pith:HIPD5XRC submitted 2025-03-19 gr-qc

Kalin V. Staykov , Daniela D. Doneva , Pedro G. S. Fernandes , Stoytcho S. Yazadjiev This is my paper
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keywords blackrotatingscalarizedcouplingholesscalarizationstatictheory
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We perform an in-depth analysis of rotating scalarized black holes in scalar-Gauss-Bonnet gravity, where scalarization is induced by the spacetime curvature. Our results show that even for very large spins, the scalar charge can reach values comparable to those in the static limit, meaning it is not significantly suppressed. Consequently, curvature-induced scalarization can lead to non-GR signatures of similar magnitude in both static and rapidly rotating cases. For certain coupling parameters, these scalarized black hole solutions remain within the regime of validity of the effective field theory, where the theory has well-posed formulations.

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  1. Supermassive black hole scalarization and effective field theory

    gr-qc 2025-06 accept novelty 6.0 of 10

    A canonical two-scalar EFT cannot naturally produce supermassive-only black hole scalarization, because the generated G^2 term has the wrong sign and is suppressed.

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