Gravitational evolution and stability of boson halos

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We investigate the gravitational evolution of dark matter halos made up of a massless bosonic field. The coupled Einstein-Klein-Gordon equations are solved numerically, showing that such a boson halo is stable and can be formed under a large class of initial conditions. We also present an analytical proof that such objects are stable in the Newtonian limit. In the context of boson stars made of massive scalar fields, we introduce new solutions with an oscillatory scalar field, similar to boson halos. We find that these solutions are unstable.
11 pages, RevTeX, 6 Postscript figures

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General Relativity and Quantum Cosmology

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http://salesiana.dossiersoluciones.com/handle/123456789/36151

Consulte el texto completo en el siguiente enlace:

https://arxiv.org/abs/gr-qc/9802054
 http://arxiv.org/abs/gr-qc/9802054

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arXiv