560 citations · 3.5k across the 39 of their papers we have counts for
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Axion boson stars
Davide Guerra, Caio F. B. Macedo, Paolo Pani
We study novel solitonic solutions to Einstein-Klein-Gordon theory in the presence of a periodic scalar potential arising in models of axion-like particles. The potential depends o…
Absorption by black hole remnants in metric-affine gravity
Adria Delhom, Caio F. B. Macedo, Gonzalo J. Olmo +1
Using numerical methods, we investigate the absorption properties of a family of nonsingular solutions {which arise in different metric-affine theories, such as quadratic and Born-…
Parametrized black hole quasinormal ringdown. II. Coupled equations and quadratic corrections for nonrotating black holes
Ryan McManus, Emanuele Berti, Caio F. B. Macedo +3
Linear perturbations of spherically symmetric spacetimes in general relativity are described by radial wave equations, with potentials that depend on the spin of the perturbing fie…
Ultralight boson cloud depletion in binary systems
Emanuele Berti, Richard Brito, Caio F. B. Macedo +2
Ultralight scalars can extract rotational energy from astrophysical black holes through superradiant instabilities, forming macroscopic boson clouds. This process is most efficient…
Self-interactions and Spontaneous Black Hole Scalarization
Caio F. B. Macedo, Jeremy Sakstein, Emanuele Berti +3
It has recently been shown that nontrivial couplings between a scalar and the Gauss-Bonnet invariant can give rise to black hole spontaneous scalarization. Theories that exhibit th…
Black holes with surrounding matter and rainbow scattering
Luiz C. S. Leite, Caio F. B. Macedo, Luís C. B. Crispino
The scattering of light by water droplets can produce one of the most beautiful phenomena in Nature: the rainbow. This optical phenomenon has analogues in molecular, atomic and nuc…
Parametrized black hole quasinormal ringdown. I. Decoupled equations for nonrotating black holes
Vitor Cardoso, Masashi Kimura, Andrea Maselli +3
Black hole solutions in general relativity are simple. The frequency spectrum of linear perturbations around these solutions (i.e., the quasinormal modes) is also simple, and there…