Understand
We found quasinormal modes, both in time and frequency domains, of the Ernst black holes, that is neutral black holes immersed in an external magnetic field.
- The Ernst solution reduces to the Schwarzschild solution, when the magnetic field vanishes.
- It is found that the quasinormal spectrum for massless scalar field in the vicinity of the magnetized black holes acquires an effective "mass" $\mu = 2 B m$, where m is the azimuthal number and B is parameter describing the magnetic field.
- We shall show that in the presence of a magnetic field quasinormal modes are longer lived and have larger oscillation frequencies.
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