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30 papers · 1 filter
Cylindrical wormholes in DGP gravity
Martín G. Richarte
We construct traversable thin-shell wormholes in the Dvali-Gabadadze-Porrati theory with cylindrical symmetry applying the cut and paste procedure to a flat black string solution o…
Dark radiation and dark matter coupled to holographic Ricci dark energy
Luis P. Chimento, Martín G. Richarte
We investigate a universe filled with interacting dark matter, holographic dark energy, and dark radiation for the spatially flat Friedmann-Robertson-Walker (FRW) spacetime. We use…
Modified holographic Ricci dark energy coupled to interacting dark matter and a non interacting baryonic component
Luis P. Chimento, Mónica I. Forte, Martín G. Richarte
We examine a Friedmann-Robertson-Walker universe filled with interacting dark matter, modified holographic Ricci dark energy (MHRDE), and a decoupled baryonic component.The estimat…
Charged shells in a (2+1)-dimensional spacetime
Ernesto F. Eiroa, Claudio Simeone
We study circular shells in a (2+1)-dimensional background within the framework of Einstein-Born-Infeld theory. For shells around black holes we analyze the mechanical stability un…
Explicit expressions for optical scalars in gravitational lensing from general matter sources
Emanuel Gallo, Osvaldo M. Moreschi
We present explicit expressions for the optical scalars and the deection angle in terms of the energymomentum tensor components of matter distributions. Our work generalizes standa…
Approximation Method for the Relaxed Covariant Form of the Gravitational Field Equations for Particles
Emanuel Gallo, O. M. Moreschi
We present a study of the so called relaxed field equations of general relativity in terms of a decomposition of the metric; which is designed to deal with the notion of particles.…