In a recent paper "Spontaneous scalarisation of charged black holes: coupling dependence and dynamical features", [arXiv:1902.05079], by Gr@v members A. Pombo and E. Radu, in collaboration with a group at IST-Lisbon (P. Fernandes, C. Herdeiro and N. Sanchis-Gual), fully non-linear evolutions of the process of spontaneous scalarisation of charged black holes.
Such type of scalarisation process was first studied in Phys. Rev. Lett. 121 (2018) 101102.
This webpage exhibits visualisations of the numerical simulations presented in the paper showing the scalarisation phenomenon under different types of perturbations.
Video 1: Scalarisation of a Reissner-Nordstrom black hole with charge to mass ratio q=0.2 under a spherically symmetric Gaussian scalar field perturbation. This evolution was done for an Einstein-Maxwell-scalar model with an non-minimal coupling of exponential form between the scalar and the Maxwell field. See [arXiv:1902.05079] for details.
Video 2: Scalarisation of a Reissner-Nordstrom black hole with charge to mass ratio q=0.2 under a dipolar scalar field perturbation. This evolution was done for an Einstein-Maxwell-scalar model with an non-minimal coupling of exponential form between the scalar and the Maxwell field. See [arXiv:1902.05079] for details.
Video 3: Scalarisation of a Reissner-Nordstrom black hole with charge to mass ratio q=0.2 under a quadrupolar scalar field perturbation. This evolution was done for an Einstein-Maxwell-scalar model with an non-minimal coupling of exponential form between the scalar and the Maxwell field. See [arXiv:1902.05079] for details.