Astronomy and Astrophysics – Astrophysics
Scientific paper
2006-08-24
Phys.Rev. D74 (2006) 063504
Astronomy and Astrophysics
Astrophysics
8 revtex pages, 10 eps figures. Accepted for publication in PRD
Scientific paper
10.1103/PhysRevD.74.063504
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.
Bernal Argelia
Guzman Siddhartha F.
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