81 citations · 446 across the 17 of their papers we have counts for
17 papers
Born-Infeld Electrogravity and Dyonic Black Holes
Guadalupe Ahumada Acuña, Cecilia Bejarano, Rafael Ferraro
Born-Infeld electrogravity is defined through a Lagrangian that couples gravity and electromagnetism within a single determinantal structure. The field equations are derived in Pal…
supersymmetry in gravity with torsion and non-metricity
Cecilia Bejarano, Eric Lescano
We study the inclusion of fermionic degrees of freedom and supersymmetry in 4-dimensional manifolds with arbitrary torsion and non-metricity tensors deforming the conn…
Determinantal Born-Infeld Coupling of Gravity and Electromagnetism
Victor I. Afonso, Cecilia Bejarano, Rafael Ferraro +1
We study a Born-Infeld inspired model of gravity and electromagnetism in which both types of fields are treated on an equal footing via a determinantal approach in a metric-affine…
Circularly symmetric thin-shell wormholes in F(R) gravity with (2+1)-dimensions
Cecilia Bejarano, Ernesto F. Eiroa, Griselda Figueroa-Aguirre
Within the framework of theories of gravity with (2+1)-dimensions and constant scalar curvature , we construct a family of thin-shell wormholes with circular symmetry and…
Thin-shell wormholes in (2+1)-dimensional F(R) theories
Cecilia Bejarano, Ernesto F. Eiroa, Griselda Figueroa-Aguirre
We construct a broad family of thin-shell wormholes with circular symmetry in (2+1)-dimensional F(R) theories of gravity, with constant scalar curvature R. We study the stability o…
Geometric inequivalence of metric and Palatini formulations of General Relativity
Cecilia Bejarano, Adria Delhom, Alejandro Jiménez-Cano +2
Projective invariance is a symmetry of the Palatini version of General Relativity which is not present in the metric formulation. The fact that the Riemann tensor changes nontrivia…
Reflections on the covariance of modified teleparallel theories of gravity
Cecilia Bejarano, Rafael Ferraro, Franco Fiorini +1
We review the current status of the Lorentz covariance in teleparallel and modified teleparallel theories of gravity, and discuss the controversial features of the different approa…
McVittie solution in f(T) gravity
Cecilia Bejarano, Rafael Ferraro, María José Guzmán
We show that McVittie geometry, which describes a black hole embedded in a FLRW universe, not only solves Einstein equations but also remains as a non-deformable solution of f(T) g…
The role of torsion in projective invariant theories of gravity with non-minimally coupled matter fields
V. I. Afonso, Cecilia Bejarano, Jose Beltran Jimenez +2
We study a large family of metric-affine theories with a projective symmetry, including non-minimally coupled matter fields which respect this invariance. The symmetry is straightf…
What is a singular black hole beyond General Relativity?
Cecilia Bejarano, Gonzalo J. Olmo, Diego Rubiera-Garcia
Exploring the characterization of singular black hole spacetimes, we study the relation between energy density, curvature invariants, and geodesic completeness using a quadratic $f…
Palatini wormholes and energy conditions from the prism of General Relativity
Cecilia Bejarano, Francisco S. N. Lobo, Gonzalo J. Olmo +1
Wormholes are hypothetical shortcuts in spacetime that in General Relativity unavoidably violate all of the pointwise energy conditions. In this paper, we consider several wormhole…
Kerr geometry in f(T) gravity
Cecilia Bejarano, Rafael Ferraro, María José Guzmán
Null tetrads are shown to be a valuable tool in teleparallel theories of modified gravity. We use them to prove that Kerr geometry remains a solution for a wide family of f(T) theo…
Kelvin-Helmholtz versus Hall Magneto-shear instability in astrophysical flows
Daniel O. Gomez, Cecilia Bejarano, Pablo D. Mininni
We study the stability of shear flows in a fully ionized plasma. Kelvin-Helmholtz is a well known, macroscopic and ideal shear-driven instability. In sufficiently low density plasm…
General formalism for the stability of thin-shell wormholes in 2+1 dimensions
Cecilia Bejarano, Ernesto F. Eiroa, Claudio Simeone
In this article we theoretically construct circular thin-shell wormholes in a 2+1 dimensional spacetime. The construction is symmetric with respect to the throat. We present a gene…
Dilaton thin-shell wormholes supported by a generalized Chaplygin gas
Cecilia Bejarano, Ernesto F. Eiroa
In this article, we construct spherical thin-shell wormholes with charge in dilaton gravity. The exotic matter required for the construction is provided by a generalized Chaplygin…
Shear-driven instabilities in Hall-MHD plasmas
Cecilia Bejarano, Daniel Gómez, Axel Brandenburg
The large-scale dynamics of plasmas is well described within the framework of magnetohydrodynamics (MHD). However, whenever the ion density of the plasma becomes sufficiently low,…
Thin-shell wormholes associated with global cosmic strings
Cecilia Bejarano, Ernesto F. Eiroa, Claudio Simeone
In this article we construct cylindrical thin-shell wormholes in the context of global cosmic strings. We study the stability of static configurations under perturbations preservin…