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Very recently, it was pointed out that there exists a population of gamma-raysources without associations at other wavelengths which exhibit spectralfeatures consistent with mono-energetic lines at energies of approximately 111and 129 GeV. Given recent evidence of similar gamma-ray lines from the InnerGalaxy, it is tempting to interpret these unassociated sources as nearby darkmatter subhalos, powered by ongoing annihilations. In this paper, we study thespectrum, luminosity, and angular distribution of these sources, with theintention of testing the hypothesis that they are, in fact, dark mattersubhalos. We find that of the 12 sources containing at least one prospectiveline photon, only 2 exhibit an overall gamma-ray spectrum which is consistentwith that predicted from dark matter annihilations (2FGL J2351.6-7558 and 2FGLJ0555.9-4348). After discounting the 10 clearly non-dark matter sources, thestatistical significance of the remaining two prospective line photons isnegligible. That being said, we cannot rule out the possibility that either orboth of these sources are dark matter subhalos; their overall luminosity andgalactic latitude distribution are not inconsistent with a dark matter origin.

Are Lines From Unassociated Gamma-Ray Sources Evidence For Dark Matter Annihilation?