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Scalarized Kerr-Newman Black Holes
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In this paper, we construct scalarized rotating black holes within the framework of Einstein-Maxwell-scalar models. These models incorporate non-minimal couplings that can induce tachyonic instabilities, leading to the spontaneous scalarization of Kerr-Newman (KN) black holes. By exploring the domain of existence, we observe that the presence of scalarized KN black holes is suppressed by the black hole spin, with a maximum spin threshold beyond which scalarized solutions cease to exist. Intriguingly, we find that in specific parameter regimes, scalarized KN black holes can exhibit the presence of two unstable and one stable light rings on the equatorial plane, manifesting in both prograde and retrograde directions.
Forward citations
Cited by 3 Pith papers
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Rotating Black Holes in Einstein-Born-Infeld Theory
Exact rotating charged Einstein-Born-Infeld black holes are constructed numerically; they show charge-dependent extremal or naked-singularity endpoints, gyromagnetic ratio above 2, and ISCO radii below Kerr-Newman values.
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Angular momentum flux through post-Newtonian order for noncircular nonspinning black-hole binaries in Einstein-Maxwell-dilaton theory
The scalar, electromagnetic, and tensor contributions to the angular momentum flux from noncircular EMd binaries are derived through 1PN order.
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Spin-induced Scalarized Black Holes in Einstein-Maxwell-scalar Models
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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