Uma discussão da acústica de fluidos como modelo análogo da gravidade

• Ano de defesa: 2019
• Autor(a) principal: Santos, Fagner Justiniano de Andrade
• Tipo de documento: Dissertação
• Tipo de acesso: Acesso aberto
• Idioma: por
• Instituição de defesa: Universidade Federal de Alagoas; Brasil; Programa de Pós-Graduação em Física; UFAL
• Palavras-chave em Português: Acústica de fluidos; Dinâmica dos fluidos; Gravidade (Física); Fluid Acoustics; Fluid Dynamics; Gravity (Physics); CNPQ::CIENCIAS EXATAS E DA TERRA::FISICA
• Link de acesso: http://www.repositorio.ufal.br/handle/riufal/5399

Analogous models of gravity is a research program that investigates analogues of gravitational felds in general relativity, considering other non-relativistic physical systems. The motivation is mainly due to the fact that it is not possible to experimentally verify the Hawking radiation (radiation emitted by a black hole). This implies that the black hole is not completely black, it emits something, and from the physical point of view it raises the question if I can detect that emission, the answer is no, and not because technology is still not sophisticated enough for that , can not because it is never possible, because the properties of this radiation is proportional to the inverse of the square of the mass of the black hole, which has fantastic mass. So any signal type Hawking radiation coming from that black hole will be so attenuated that it can not be measured, comparing, for example, with background radiation that is already greatly attenuated. In this dissertation we bring a discussion about acoustic analogs, a study that deals with models from the propagation of waves in uid medium. A classical approach that captures inherent aspects of relativistic gravity, especially the existence of what defines a black hole, the event horizon.