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Extreme -boson stars
Miguel Alcubierre, Juan Barranco, Argelia Bernal +6
A new class of complex scalar field objects, which generalize the well known boson stars, was recently found as solutions to the Einstein-Klein-Gordon system. The generalization co…
A stabilization mechanism for excited fermion-boson stars
Fabrizio Di Giovanni, Saeed Fakhry, Nicolas Sanchis-Gual +2
We study numerically the nonlinear stability of {\it excited} fermion-boson stars in spherical symmetry. Such compound hypothetical stars, composed by fermions and bosons, are grav…
Gravitational and electromagnetic perturbations of a charged black hole in a general gauge condition
Claudia Moreno, Juan Carlos Degollado, Darío Núñez +1
We derive a set of coupled equations for the gravitational and electromagnetic perturbation in the Reissner-Nordström geometry using the Newman Penrose formalism. We show that the…
On the linear stability of -boson stars with respect to radial perturbations
Miguel Alcubierre, Juan Barranco, Argelia Bernal +5
In previous work we constructed new boson star solutions consisting of a family of massive complex scalar fields minimally coupled to gravity in which the individual fields have an…
Stability study of a model for the Klein-Gordon equation in Kerr space-time II
Horst Reinhard Beyer, Miguel Alcubierre, Miguel Megevand
The present paper is a follow-up of our previous paper that derives a slightly simplified model equation for the Klein-Gordon equation, describing the propagation of a scalar field…