Relationship between γ-ray sources and star formation regions

A statistically significant correlation between the position of unidentified discrete γ-ray sources with star formation regions in the Galaxy has been obtained. The fraction of unidentified discrete γ-ray sources coincident with star formation regions was found to be 47 ± 8%. The coincident γ-ray sources have on average more rigid spectra and higher fluxes in comparison with other unidentified discrete γ-ray sources. A possible mechanism of γ radiation from star formation regions is the annihilation of particles of the dark matter concentrated in the star formation regions.