62 citations · 350 across the 22 of their papers we have counts for
21 papers · 1 filter
Nonlinear electrodynamics in Kerr-Newman-NUT- spacetime: exact solutions, horizons, and energy conditions
Oscar Galindo-Uriarte, Nora Breton, Claus Lämmerzahl +1
We construct two exact nonlinear-electrodynamic generalizations of the Kerr-Newman-NUT- spacetime. Imposing alignment between the principal directions of the electromagnetic fie…
Shadow of a noncommutative inspired Einstein-Euler-Heisenberg black hole
Marco Maceda, Alfredo Macías, Daniel Martínez-Carbajal
Using a noncommutative inspired Einstein-Euler-Heisenberg black hole, we analyse the associated graviton and light rings that together with the event horizon, provide the necessary…
Non-commutative inspired black holes in Euler-Heisenberg non-linear electrodynamics
Marco Maceda, Alfredo Macías
We find non-commutative inspired electrically and magnetically charged black hole solutions in Euler-Heisenberg non-linear electrodynamics. For these solutions, we determine the no…
On slowly rotating black holes and nonlinear electrodynamics
Claus Lämmerzahl, Marco Maceda, Alfredo Macías
We discuss the solution to Einstein's equations for a Lense-Thirring inspired metric describing a slowly rotating black hole coupled to nonlinear electrodynamics. We show that diff…
Bose-Einstein Condensates in Charged Black-Hole Spacetimes
Elías Castellanos, Juan Carlos Degollado, Claus Lämmerzahl +2
We analyze Bose-Einstein condensates on three types of spherically symmetric and static charged black-hole spacetimes: The Reissner-Nordström spacetime, Hoffmann's Born-Infeld blac…
Scalar field as a Bose-Einstein condensate in a Schwarzschild-de Sitter spacetime
Elías Castellanos, Celia Escamilla-Rivera, Claus Lämmerzahl +1
In this paper we analyze some properties of a scalar field configuration, where it is considered as a trapped Bose-Einstein condensate in a Schwarzschild-de Sitter background space…
On naked singularities in the extreme double Reissner-Nordström solution
I. Cabrera-Munguia, Alfredo Macías
We present a quite simple analytical study on the appearance or absence of naked singularities in binary systems. As an example we consider the double Reissner-Nordström solution a…
Generalized black diholes
I. Cabrera-Munguia, Claus Lämmerzahl, L. A. López +1
A 5-parametric exact solution, describing a binary system composed of identical counter-rotating black holes endowed with opposite electromagnetic charges, is constructed. The addi…
Scalar Field as a Bose-Einstein Condensate?
Elías Castellanos, Celia Escamilla-Rivera, Alfredo Macías +1
We discuss the analogy between a classical scalar field with a self-interacting potential, in a curved spacetime described by a quasi--bounded state, and a trapped Bose-Einstein co…
Opposite charged two-body system of identical counter-rotating black holes
I. Cabrera-Munguia, Claus Lämmerzahl, L. A. López +1
A 4-parametric exact solution describing a two-body system of identical Kerr-Newman counter-rotating black holes endowed with opposite electric/magnetic charges is presented. The a…
Motion of test particles in a regular black hole space--time
Alberto García, Eva Hackmann, Jutta Kunz +2
We consider the motion of test particles in the regular black hole space-time given by Ayón-Beato and Garc\'ıa in Phys. Rev. Lett. 80:5056 (1998). The complete set of orbits for ne…
Exact solution for a binary system of unequal counter-rotating black holes
I. Cabrera-Munguia, Claus Lämmerzahl, Alfredo Macías
A complete solution describing a binary system constituted by two unequal counter-rotating black holes with a massless strut inbetween is presented. It is expressed in terms of fou…
Exact solution for two unequal counter-rotating black holes
I. Cabrera-Munguia, Claus Lämmerzahl
The complete solution for two unequal counter-rotating black holes separated by a massless strut, is developed in terms of four arbitrary parameters involving two quantities σ1 and…
Static Black Holes of Metric-Affine Gravity in the Presence of Matter
Eloy Ayón-Beato, Alberto García, Alfredo Macías +1
We investigate spherically symmetric and static gravitational fields representing black hole configurations in the framework of metric-affine gauge theories of gravity (MAG) in the…
Note on Scalar Fields Non-Minimally Coupled to (2+1)-Gravity
Eloy Ayón-Beato, Alberto García, Alfredo Macías +1
Scalar fields non--minimally coupled to (2+1)-gravity, in the presence of cosmological constant term, are considered. Non-minimal couplings are described by the term in th…
Uniqueness theorems for static black holes in metric-affine gravity
Eloy Ayón-Beato, Alberto García, Alfredo Macías +1
Using the equivalence theorem for the triplet ansatz sector of metric-affine gravity (MAG) theories and the Einstein-Proca system, it is shown that the only static black hole of th…
Generalized Reissner-Nordström solution in Metric-Affine Gravity
Alfredo Macías, José Socorro
We present the generalized Reissner-Nordström solution of the field equations of metric-affine gravity (MAG), endowed with electric and magnetic charges, as well as with gravito-el…
Multipole solutions in metric--affine gravity
José Socorro, Claus Lämmerzahl, Alfredo Macías +1
Above Planck energies, the spacetime might become non--Riemannian, as it is known fron string theory and inflation. Then geometries arise in which nonmetricity and torsion appear a…
Volume elements of spacetime and a quartet of scalar fields
Frank Gronwald, Uwe Muench, Alfredo Macías +1
Starting with a `bare' 4-dimensional differential manifold as a model of spacetime, we discuss the options one has for defining a volume element which can be used for physical theo…
Colliding waves in metric-affine gravity
Alberto García, Claus Lämmerzahl, Alfredo Macías +2
We generalize the formulation of the colliding gravitational waves to metric-affine theories and present an example of such kind of exact solutions. The plane waves are equipped wi…
Supersymmetric quantum cosmology for Bianchi class A models
Alfredo Macías, Eckehard W. Mielke, José Socorro
The canonical theory of (N=1) supergravity, with a matrix representation for the gravitino covector-spinor, is applied to the Bianchi class A spatially homogeneous cosmologies. The…