Scalarized black holes in Einstein-scalar-Gauss-Bonnet-Ricci theory exhibit a continuous hierarchy of angular instabilities, starting in the eikonal regime and extending down to the quadrupole mode.
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A hairy black hole solution is constructed in Einstein-Gauss-Bonnet gravity and shown to be stable under odd parity perturbations when a scalar field profile parameter satisfies a positivity condition on the Regge-Wheeler potential.
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Hierarchy of Angular Instabilities in Scalarized Black Holes
Scalarized black holes in Einstein-scalar-Gauss-Bonnet-Ricci theory exhibit a continuous hierarchy of angular instabilities, starting in the eikonal regime and extending down to the quadrupole mode.
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Hairy black hole stability under odd parity perturbations in the Einstein-Gauss-Bonnet model
A hairy black hole solution is constructed in Einstein-Gauss-Bonnet gravity and shown to be stable under odd parity perturbations when a scalar field profile parameter satisfies a positivity condition on the Regge-Wheeler potential.