Gamma rays from the galactic halo

A re-analysis of the EGRET data by Dixon et al. [1] has shown the existence of a statistically significant diffuse gamma-ray emission from the galacti c halo. This emission is naturally explained within a previously-proposed m odel for baryonic dark matter, in which gamma-rays are produced through the interaction of high-energy cosmic-ray protons with cold gas clouds clumped along with brown dwarfs into dark clusters. These dark clusters supposedly populate the outer galactic halo and can show up in microlensing observati ons.