Diffuse inverse Compton and synchrotron emission from dark matter annihilations in galactic satellites

Annihilating dark matter particles produce roughly as much power in electronsand positrons as in gamma ray photons. The charged particles lose essentiallyall of their energy to inverse Compton and synchrotron processes in thegalactic environment. We discuss the diffuse signature of dark matterannihilations in satellites of the Milky Way (which may be optically dark withfew or no stars), providing a tail of emission trailing the satellite in itsorbit. Inverse Compton processes provide X-rays and gamma rays, and synchrotronemission at radio wavelengths might be seen. We discuss the possibility ofdetecting these signals with current and future observations, in particularEGRET and GLAST for the gamma rays.Comment: 13 pages, 5 figure