Submitted by Automa??o e Estat?stica (sst@bczm.ufrn.br) on 2017-04-17T23:01:22Z No. of bitstreams: 1 KelderCavalcantiDeVasconcelos_TESE.pdf: 1109145 bytes, checksum: 0466a61f09e9772960e9a9b712348a10 (MD5) / Approved for entry into archive by Arlan Eloi Leite Silva (eloihistoriador@yahoo.com.br) on 2017-04-20T18:37:43Z (GMT) No. of bitstreams: 1 KelderCavalcantiDeVasconcelos_TESE.pdf: 1109145 bytes, checksum: 0466a61f09e9772960e9a9b712348a10 (MD5) / Made available in DSpace on 2017-04-20T18:37:43Z (GMT). No. of bitstreams: 1 KelderCavalcantiDeVasconcelos_TESE.pdf: 1109145 bytes, checksum: 0466a61f09e9772960e9a9b712348a10 (MD5) Previous issue date: 2016-12-19 / Coordena??o de Aperfei?oamento de Pessoal de N?vel Superior (CAPES) / Nesta tese, a propaga??o de ondas eletromagn?ticas no contexto de eletrodin?micas n?o lineares, ? cuidadosamente analisada dentro de um espa?o-tempo criado por uma massa esfericamente sim?trica e eletricamente carregada. Dentro de certas aproxima??es, verificamos a exist?ncia da auto intera??o eletromagn?tica entre o campo eletrost?tico de fundo e a radia??o que nele se propaga, e adotamos para esta an?lise uma abordagem conhecida como m?trica efetiva. Observamos que a m?trica efetiva n?o gera horizontes de eventos efetivos, por?m as n?o linearidades alteram as posi??es usuais dos horizontes de eventos de buracos negros tipo Reissner-Nordstr?m. Na aproxima??o linear, calculamos como a auto intera??o afeta o desvio geod?sico e o redshift da propaga??o de f?tons pr?ximo destes objetos massivos carregados. Por fim, utilizando a Lagrangeana efetiva de Euler-Heinsenberg, estimamos a contribui??o da auto intera??o no redshift geom?trico perto de objetos compactos extremais. / In this thesis, the propagation of non-linear electromagnetic waves is careful analyzed on a curved spacetime created by spherically symmetric mass and charge distribution. Using certain approximations we verified the existence of electromagnetic selfinteraction between the background electrostatic field and the radiation that propagates on it, and we adopted for this analysis an approach known as effective metric. We observed that the effective metric does not generate effective events horizons, but the non linearities changes the event horizons usual positions of Reissner-Nordstr?m black holes. In linear approximation, we compute how the self-interaction affects the geodesic deviation and the redshift of photons propagating near this massive charged object. Using the Euler-Heisenberg effective Lagrangian, we estimate the contribution of these self-interactions in the geometrical reshift near extremal compact objects.