Gravitational evolution and stability of boson halos

Details Gravitational evolution and stability of boson halos Gravitational evolution and stability of boson halos

1998-02-20

arxiv.org/abs/gr-qc/9802054v1

Astronomy and Astrophysics

Astrophysics

General Relativity and Quantum Cosmology

11 pages, RevTeX, 6 Postscript figures

Scientific paper

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.

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