Spin-Induced Black Hole Spontaneous Scalarization
Spin-Induced Black Hole Spontaneous Scalarization
We study scalar fields in a black hole background and show that, when the scalar is suitably coupled to curvature, rapid rotation can induce a tachyonic instability. This instability, which is the hallmark of spontaneous scalarization in the linearized regime, is expected to be quenched by nonlinearities and endow the …