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Absorption of planar massless scalar waves by Kerr black holes
Caio F. B. Macedo, Luiz C. S. Leite, Ednilton S. Oliveira +2
We consider planar massless scalar waves impinging upon a Kerr black hole, for general angles of incidence. We compute the absorption cross section via the partial wave approach, a…
Astrophysical signatures of boson stars: quasinormal modes and inspiral resonances
Caio F. B. Macedo, Paolo Pani, Vitor Cardoso +1
Compact bosonic field configurations, or boson stars, are promising dark matter candidates which have been invoked as an alternative description for the supermassive compact object…
Greybody factors for non-minimally coupled scalar fields in Schwarzschild-de Sitter spacetime
Luís C. B. Crispino, Atsushi Higuchi, Ednilton S. Oliveira +1
We compute the greybody factors for non-minimally coupled scalar fields in four-dimensional Schwarzschild-de Sitter spacetime. In particular, we demonstrate that the zero-angular-m…
Into the lair: gravitational-wave signatures of dark matter
Caio F. B. Macedo, Paolo Pani, Vitor Cardoso +1
The nature and properties of dark matter (DM) are both outstanding issues in physics. Besides clustering in halos, the universal character of gravity implies that self-gravitating…