Fig. 4
From: Quasinormal modes of hot, cold and bald Einstein–Maxwell-scalar black holes
EM-led modes for axial (a, b) and polar (c, d) \(l=1\) perturbations: scaled frequency \(M\omega _R\) (a, c) and scaled damping rate \(-M\omega _I\) (b, d) vs. reduced charge q for RN (black), and cold (blue) and hot (red) scalarized black holes (\(\alpha =200\))