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Shadows and Properties of Spin-Induced Scalarized Black Holes with and without a Ricci Coupling

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arxiv 2403.14596 v1 pith:WVGBS2XT submitted 2024-03-21 gr-qc astro-ph.HEhep-th

Pedro G. S. Fernandes , Clare Burrage , Astrid Eichhorn , Thomas P. Sotiriou This is my paper · ORCID
classification gr-qcastro-ph.HEhep-th
keywords blackholescouplingdeviationskerrricciscalarizedshadows
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In this work, we explore the properties and shadows of spin-induced scalarized black holes, as well as investigate how a Ricci coupling influences them. Our findings reveal significant deviations from the Kerr metric in terms of the location and geodesic frequencies of the innermost stable circular orbit and light ring, with the former exhibiting more pronounced disparities. The shadows of scalarized black holes exhibit relatively minor deviations when compared to those of Kerr black holes with the same mass and spin. Overall, the presence of a Ricci coupling is observed to mitigate deviations from the Kerr metric.

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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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