120 citations · 854 across the 24 of their papers we have counts for
7 papers · 1 filter
Non-exotic traversable wormhole solutions in linear gravity
João Luís Rosa, Paul Martin Kull
In this work we analyze traversable wormhole solutions in the linear form of gravity satisfying the Null, Weak, Strong, and Dominant Energy Conditions (NEC…
Multi-kink braneworld configurations in the scalar-tensor representation of gravity
D. Bazeia, A. S. Lobão, João Luís Rosa
In this work we investigate the brane in the scalar-tensor representation, where the solutions of the equations of motions for the source field engender topological defect…
Observational signatures of hot spots orbiting horizonless objects
João Luís Rosa, Paulo Garcia, Frédéric H. Vincent +1
Pushed by a number of advances, electromagnetic observatories have now reached the horizon scale of supermassive black holes. The existence and properties of horizons in our univer…
Shadows of boson and Proca stars with thin accretion disks
João Luís Rosa, Diego Rubiera-Garcia
In this work, we obtain the shadow images of spherically symmetric scalar boson and Proca stars using analytical fittings of numerical solutions, when illuminated by a geometricall…
Junction conditions of Palatini gravity
João Luís Rosa, Diego Rubiera-Garcia
We work out the junction conditions for the Palatini extension of General Relativity, where is an arbitrary function of the curvature scalar of…
Cosmological sudden singularities in gravity
Tiago B. Gonçalves, João Luís Rosa, Francisco S. N. Lobo
In this work, we study the possibility of finite-time future cosmological singularities appearing in gravity, where is the Ricci scalar and is the trace of the str…