120 citations · 1.2k across the 37 of their papers we have counts for
8 papers · 1 filter
Spherically symmetric vacuum solutions in 1-Parameter New General Relativity and their phenomenology
Helen Asuküla, Sebastian Bahamonde, Manuel Hohmann +3
In this work, we study spherically symmetric vacuum solutions in 1-parameter New General Relativity (NGR), a specific theory in teleparallel gravity which is constructed from the t…
Traversable wormholes with double layer thin shells in quadratic gravity
Joao Luís Rosa, Rui André, José P. S. Lemos
In quadratic gravity, the junction conditions are six and permit the appearance of double layer thin shells. Double layers arise typically in theories with dipoles, i.e., two oppos…
Dynamical reconstruction of the CDM model in scalar-tensor gravity
Tiago B. Gonçalves, João Luís Rosa, Francisco S. N. Lobo
In this work, we use the dynamical system approach to explore the cosmological background evolution of the scalar-tensor representation of gravity, where is the Ricci…
Imaging compact boson stars with hot-spots and thin accretion disks
João Luís Rosa, Caio F. B. Macedo, Diego Rubiera-Garcia
In this work we consider the observational properties of compact boson stars with self-interactions orbited by isotropically emitting (hot-spot) sources and optically thin accretio…
Scalar-tensor representation to brane with Gauss-Bonnet gravity
A. S. Lobão, João Luís Rosa, D. Bazeia
In this paper, we generalize the analysis of the brane via the inclusion of a term proportional to the Gauss-Bonnet invariant. We consider an action of the form $F(R,G,T)=…
Junction conditions for LRS spacetimes in the covariant formalism
João Luís Rosa, Sante Carloni
We use the distribution formalism to derive the complete set of junction conditions for general Local Rotationally Symmetric (LRS) spacetimes in the covariant formalism. We…
Observational properties of relativistic fluid spheres with thin accretion disks
João Luís Rosa
In this work we analyze the observational properties of incompressible relativistic fluid spheres with and without thin-shells, when surrounded by thin accretion disks. We consider…
Shadows and photon rings of regular black holes and geonic horizonless compact objects
Gonzalo J. Olmo, João Luís Rosa, Diego Rubiera-Garcia +1
The optical appearance of a body compact enough to feature an unstable bound orbit, when surrounded by an accretion disk, is expected to be dominated by a luminous ring of radiatio…