Dark mini-halos, micro-halos and intermediate-mass black holes in the solar neighborhood

Galaxies like the Milky Way may each be host to 103—104 intermediate mass black holes (102 M⊙—103 M⊙) and 103 minihalos of 106 M⊙ or 1015 microhalos of 10-6 M⊙. Our nearest micro/mini-halos or black holes might be only 0.3—3000 light years away. If dark matter is composed of self-annihilating neutralinos, then these substructures hold the promise of being detectable by next generation γ-ray detectors such as GLAST.