Orador: João Rosa (Universidade de Aveiro).
Data, hora e local: 11 de fevereiro de 2016, às 11h30m na sala de reuniões do Departamento de Matemática.
Resumo: I will discuss the generic properties of gravitational plane wave scattering in the Kerr spacetime. I will then show how these results can be applied to realistic astrophysical systems involving a rotating black hole and a companion that emits gravitational radiation, and examine the conditions under which an overall amplification of the companion’s luminosity due to superradiant scattering may occur. I will then discuss examples of systems where observational signatures of black hole superradiance may potentially be found and which may allow for novel tests of general relativity with compact objects.
For those that cannot make it, the seminar will be transmitted online and also stored on our youtube channel: https://www.youtube.com/channel/UC4xL-eUZGAUxpKCPsqLAddA