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Scalar Field Dark Matter: non-spherical collapse and late time behavior

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arxiv astro-ph/0608523 v1 pith:2LKW7SJU submitted 2006-08-24 astro-ph gr-qchep-th

Scalar Field Dark Matter: non-spherical collapse and late time behavior

classification astro-ph gr-qchep-th
keywords fieldscalarsymmetricinitialnon-sphericalsystembehaviorcollapse
verification ladder T0 review T1 audit T2 compute T3 formal T4 reserved
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We show the evolution of non-spherically symmetric balls of a self-gravitating scalar field in the Newtonian regime or equivalently an ideal self-gravitating condensed Bose gas. In order to do so, we use a finite differencing approximation of the Shcr\"odinger-Poisson (SP) system of equations with axial symmetry in cylindrical coordinates. Our results indicate: 1) that spherically symmetric ground state equilibrium configurations are stable against non-spherical perturbations and 2) that such configurations of the SP system are late-time attractors for non-spherically symmetric initial profiles of the scalar field, which is a generalization of such behavior for spherically symmetric initial profiles. Our system and the boundary conditions used, work as a model of scalar field dark matter collapse after the turnaround point. In such case, we have found that the scalar field overdensities tolerate non-spherical contributions to the profile of the initial fluctuation.

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Cited by 2 Pith papers

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  1. The three dynamical fates of Boson Stars

    gr-qc 2019-07 unverdicted novelty 3.0

    Numerical classification of spherically symmetric boson star evolutions into stable, black-hole-forming, and exploding categories via constrained evolution of the Einstein-Klein-Gordon system.

  2. 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.