560 citations · 967 across the 5 of their papers we have counts for
7 papers
Scattering effects of bumblebee gravity in metric affine formalism
N. Heidari, Caio F. B. Macedo, A. A. Araújo Filho +1
In this work, we explore a Schwarzschild-like black hole within the framework of metric--affine bumblebee gravity. First, we investigate the behavior of the Kretschmann scalar and…
Observational imprints of gravastars from accretion disks and hot-spots
João Luís Rosa, Daniela S. J. Cordeiro, Caio F. B. Macedo +1
In this work, we analyze the observational properties of thin-shell gravastars under two astrophysical frameworks, namely surrounded by optically-thin accretion disks and orbited b…
ECO-spotting: looking for extremely compact objects with bosonic fields
Vitor Cardoso, Caio F. B. Macedo, Kei-ichi Maeda +1
Black holes are thought to describe the geometry of massive, dark compact objects in the universe. To further support and quantify this long-held belief requires knowledge of possi…
Echoes of ECOs: gravitational-wave signatures of exotic compact objects and of quantum corrections at the horizon scale
Vitor Cardoso, Seth Hopper, Caio F. B. Macedo +2
Gravitational waves from binary coalescences provide one of the cleanest signatures of the nature of compact objects. It has been recently argued that the post-merger ringdown wave…
Slowly Rotating Anisotropic Neutron Stars in General Relativity and Scalar-Tensor Theory
Hector O. Silva, Caio F. B. Macedo, Emanuele Berti +1
Some models (such as the Skyrme model, a low-energy effective field theory for QCD) suggest that the high-density matter prevailing in neutron star interiors may be significantly a…
Absorption of planar massless scalar waves by Bardeen regular black holes
Caio F. B. Macedo, Luís C. B. Crispino
Accretion of fields by black holes is a subject of great interest in physics. It is known that accretion plays a fundamental role in active galactic nuclei and in the evolution of…