Charged boson stars revisited
Por:
Damian Lopez, Jose, ALCUBIERRE, MIGUEL
Publicada:
1 jun 2023
Categoría:
Physics and astronomy (miscellaneous)
Resumen:
We consider again stationary solutions to the spherically symmetric
Einstein-Maxwell-Klein-Gordon system, commonly known as ``charged boson
stars'', originally studied by Jetzer and Van Der Bij (Phys Lett B
227:341, 1989). We construct families of charged boson stars in the
ground state, for different values of the charge parameter q, and
different values of the central scalar field. Following Jetzer and Van
Der Bij, one can define a critical value for the charge q = q(c) that
corresponds to the value for which the Coulomb repulsion of the bosonic
particles exactly cancels their newtonian gravitational attraction. We
confirm the claim made by Pugliese et al. (Phys Rev D, 2013.
https://doi.org/10.1103/physrevd.88.024053) that super-critical
solutions exist for a limited range of charges above the critical value
q > q(c) (though we find an even smaller range of q for which this is
possible). Our analysis indicates, however, that all such super-critical
solutions are gravitationally unbound, and are therefore expected to be
unstable. One of the main results of our analysis is the fact that, even
though we do find a family of slightly super-critical solutions in the
sense that q > q(c), there are no super-critical solutions in the sense
that the total charge Q is larger than the total mass M of the system.
Filiaciones:
Damian Lopez, Jose:
Univ Nacl Autonoma Mexico, Inst Ciencias Nucl, AP 70-543, Mexico City 04510, Mexico
ALCUBIERRE, MIGUEL:
Univ Nacl Autonoma Mexico, Inst Ciencias Nucl, AP 70-543, Mexico City 04510, Mexico
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