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Dynamics of black holes and scalar fields

Miguel Zilhão
Universidade de Aveiro, Portugal

New light fundamental fields are natural candidates for all or a fraction of dark matter. Self-gravitating structures of such fields might be common objects in the universe, and could comprise even galactic haloes. These structures would interact gravitationally with black holes, process of the utmost importance, since it dictates their lifetime, the black hole motion and possible gravitational radiation emission.
I will present a study on the dynamics of a black hole piercing through a much larger fully relativistic boson star, made of a complex minimally coupled massive scalar. As the black hole pierces through the bosonic structure, it is slowed down by accretion and dynamical friction, giving rise to gravitational wave emission. We find evidence of a "gravitational atom" left behind as a product of the process.

2023 October 25, 13:30

Centro de Astrofísica da Universidade do Porto (Auditorium)
Rua das Estrelas, 4150-762 Porto

Faculdade de Ciências da Universidade de Lisboa Universidade do Porto Faculdade de Ciências e Tecnologia da Universidade de Coimbra
Fundação para a Ciência e a Tecnologia COMPETE 2020 PORTUGAL 2020 União Europeia