Galactic Halos As Boson Stars

Abstract

We investigate the boson star with the self-interacting scalar field as a model of galactic halos. The model has slightly increasing rotation curves and allows wider ranges of the mass($m$) and coupling($\lambda$) of the halo dark matter particle than the non-interacting model previously suggested(ref.\cite{sin1}). Two quantities are related by ${\lambda }^{\frac{1}{2}}(m_p/m{)}^2\text{st}>\sim 10^{50}$.

Comments: 15 pages. Standard Latex file with 2 tex figures. Revised version to be published in Phy. Rev. D. (Stability arguments are added.)