Spin-induced scalarization of Kerr black holes with a massive scalar field

Understand

In the present paper we study the onset of the spin-induced scalarization of a Kerr black hole in scalar-Gauss-Bonnet gravity with a massive scalar field.

• Our approach is based on a (2+1) time evolution of the relevant linearized scalar field perturbation equation.
• We examine the region where the Kerr black hole becomes unstable giving rise to new scalarized rotating black holes with a massive scalar field.
• With increasing of the scalar field mass, the minimum value of the Gauss-Bonnet coupling parameter at which scalarization is possible, increases and thus the instability region shrinks.