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arxiv: 1403.1865 · v2 · pith:YFGGXWY7new · submitted 2014-03-07 · 🌀 gr-qc

Gauss-Bonnet Boson Stars with a Single Killing Vector

classification 🌀 gr-qc
keywords bosoncentraldensityenergysolutionsalphastarsangular
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We construct asymptotically anti-de Sitter boson stars in Einstein-Gauss-Bonnet gravity coupled to a $\frac{D-1}{2}$-tuplet of complex massless scalar fields both perturbatively and numerically in D=5,7,9,11 dimensions. These solutions possess just a single helical Killing symmetry due to the choice of scalar fields. The energy density at the centre of the star characterizes the solutions, and for each choice of the Gauss-Bonnet coupling $\alpha$ we obtain a one parameter family of solutions. All solutions respect the first law of thermodynamics; in the numerical case to within 1 part in $10^6$. We describe the dependence of the angular velocity, mass, and angular momentum of the boson stars on $\alpha$ and on the dimensionality. For D>5, these quantities exhibit damped oscillations about finite central values as the central energy density tends to infinity, where the amplitude of oscillation increases nonlinearly with $\alpha$. In the limit of diverging central energy density, the Kretschmann invariant at the centre of the boson star also diverges. This is in contrast to the D=5 case, where the Kretschmann invariant diverges at a finite value of the central energy density.

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Reviewed papers in the Pith corpus that reference this work. Sorted by Pith novelty score.

  1. Dynamical Boson Stars

    gr-qc 2012-02 unverdicted novelty 2.0

    Boson stars are particle-like solutions in general relativity that model dark matter, black hole mimickers, and binary systems.