Scalarized Hairy Black Holes
Burkhard Kleihaus (1), Jutta Kunz (1), and Stoytcho Yazadjiev (2) ((1), University of Oldenburg, (2) Sofia University)
TL;DR
This paper explores scalarized rotating hairy black holes in scalar-tensor theories, detailing their existence, properties, and unique features like ergosurfaces that can surpass Kerr bounds.
Contribution
It introduces the domain of existence for scalarized black holes and describes their global properties, including ergosurface structures, extending previous general relativity results.
Findings
Existence domain bounded by scalarized boson stars and hairy black holes
Angular momentum can exceed Kerr bound
Ergosurfaces can form an ergo-Saturn structure
Abstract
In the presence of a complex scalar field scalar-tensor theory allows for scalarized rotating hairy black holes. We exhibit the domain of existence for these scalarized black holes, which is bounded by scalarized rotating boson stars and ordinary hairy black holes. We discuss the global properties of these solutions. Like their counterparts in general relativity, their angular momentum may exceed the Kerr bound, and their ergosurfaces may consist of a sphere and a ring, i.e., form an ergo-Saturn.
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