Speaker: Rodrigo Fontana (Universidade Federal da Fronteira do Sul, UFFS Chapecó)
Title: Field propagation around black hole geometries: quasinormal modes and stability issues.
Abstract: The field propagation around known solutions of Einstein Equations of general relativity is a well stablished method, with interesting results in the last decades. The scalar, Dirac, electromagnetic or Weyl field equations can be reduced in general to a one dimensional wave equation with potentials to be integrated chosen 'proper' boundary conditions. As simple as the method is, it gives us valuable information about the stability of the geometry e. g. In this talk I will explore examples of field propagation and the destabilization of it, given 'plane waves' and approach the quasinormal modes oscillations of such systems as the 'natural frequencies' that emerge when they are perturbed.