Spinning Black Holes with Axion Hair
arXiv:2306.03662 · doi:10.1088/1361-6382/acf9d6
Abstract
In this work we construct and analyse non-perturbative stationary and axially-symmetric black hole solutions in General Relativity coupled to an electromagnetic and an axion field. The axion field is coupled to the electromagnetic field, which leads to hairy solutions in the presence of an electric charge and rotation. We investigate the existence and characteristics of these solutions for different values of the spin, charge and coupling constant. Our analysis shows the presence of violations of the Kerr-Newman bound, solutions with large positive and negative values of the gyromagnetic ratio, and the existence of multiple branches of solutions with distinct properties, demonstrating that black hole uniqueness does not hold in this scenario. The code used in this study is publicly available, providing a valuable tool for further research on this model.
17 pages, 10 figures
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Cited by in corpus (8)
- Superradiant instability of a charged regular black hole
- Shadows and Properties of Spin-Induced Scalarized Black Holes with and without a Ricci Coupling
- Probing the signature of axions through the quasinormal modes of black holes
- Purely metric Horndeski theories and spontaneous curvaturization of black holes
- Rotating scalarized black holes: the role of the coupling
- Greybody factors of charged black holes with axion hair
- Evading Cauchy horizon excision in scalarized regular black holes
- From rotating attractors to extremal black holes with axionic hair